In this paper, a spectral feature extraction algorithm is proposed for palm-print recognition, which can efficiently capture the detail spatial variations in a palm-print image. The entire image is segmented into several spatial modules and the task of feature extraction is carried out using two dimensional Fourier transform within those spatial modules. A dominant spectral feature selection algorithm is proposed, which offers an advantage of very low feature dimension and results in a very high within-class compactness and between-class separability of the extracted features. A principal component analysis is performed to further reduce the feature dimension. From our extensive experimentations on different palm-print databases, it is found that the performance of the proposed method in terms of recognition accuracy and computational complexity is superior to that of some of the recent methods.
An Effective Tea Leaf Recognition Algorithm for Plant Classification Using Ra...IJMER
A leaf is an organ of a vascular plant, as identified in botanical terms, and in particular in plant morphology. Naturally a leaf is a thin, flattened organ bear above ground and it is mainly used for photosynthesis. Recognition of plants has become an active area of research as most of the plant species are at the risk of extinction. Most of the leaves cannot be recognized easily since some are not flat (e.g. succulent leaves and conifers), some does not grow above ground (e.g. bulb scales), and some does not undergo photosynthetic function (e.g. cataphylls, spines, and cotyledons).In this paper, we mainly focused on tea leaves to identify the leaf type for improving tea leaf classification. Tea leaf images are loaded from digital cameras or scanners in the system. This proposed approach consists of three phases such as preprocessing, feature extraction and classification to process the loaded image. The tea leaf images can be identified accurately in the preprocessing phase by fuzzy denoising using Dual Tree Discrete Wavelet Transform (DT-DWT) in order to remove the noisy features and boundary enhancement to obtain the shape of leaf accurately. In the feature extraction phase, Digital Morphological Features (DMFs) are derived to improve the classification accuracy. Radial Basis Function (RBF) is used for efficient classification. The RBF is trained by 60 tea leaves to classify them into 6 types. Experimental results proved that the proposed method classifies the tea leaves with more accuracy in less time. Thus, the proposed method achieves more accuracy in retrieving the leaf type.
Implementation of features dynamic tracking filter to tracing pupilssipij
The objective of this paper is to show the implementation of an artificial vision filter capable of tracking the
pupils of a person in a video sequence. There are several algorithms that can achieve this objective, for this
case, features dynamic tracking selected, which is a method that traces patterns between each frame that
form a video scene, this type of processing offers the advantage of eliminating the problems of occlusion
patterns of interest. The implementation was tested on a base of videos of people with different physical
characteristics of the eyes. An additional goal is to obtain information of the eye movements that are
captured and pupil coordinates for each of these movements. These data could help some studies related to
eye health.
This document provides a review of different methods for palmprint recognition. It begins with an introduction to palmprint recognition and the general architecture of a palmprint recognition system, which includes image acquisition, preprocessing, feature extraction, and matching. The document then reviews several related works on palmprint recognition methods. These methods extract different features from palmprint images such as principal lines, minutiae, orientation, and texture. Feature extraction is followed by matching, where templates are compared to determine similarity. The document analyzes and compares the different palmprint recognition approaches.
Segmentation of Brain MR Images for Tumor Extraction by Combining Kmeans Clus...CSCJournals
Segmentation of images holds an important position in the area of image processing. It becomes more important while typically dealing with medical images where pre-surgery and post surgery decisions are required for the purpose of initiating and speeding up the recovery process [5] Computer aided detection of abnormal growth of tissues is primarily motivated by the necessity of achieving maximum possible accuracy. Manual segmentation of these abnormal tissues cannot be compared with modern day’s high speed computing machines which enable us to visually observe the volume and location of unwanted tissues. A well known segmentation problem within MRI is the task of labeling voxels according to their tissue type which include White Matter (WM), Grey Matter (GM) , Cerebrospinal Fluid (CSF) and sometimes pathological tissues like tumor etc. This paper describes an efficient method for automatic brain tumor segmentation for the extraction of tumor tissues from MR images. It combines Perona and Malik anisotropic diffusion model for image enhancement and Kmeans clustering technique for grouping tissues belonging to a specific group. The proposed method uses T1, T2 and PD weighted gray level intensity images. The proposed technique produced appreciative results
Instant fracture detection using ir-raysijceronline
International Journal of Computational Engineering Research (IJCER) is dedicated to protecting personal information and will make every reasonable effort to handle collected information appropriately. All information collected, as well as related requests, will be handled as carefully and efficiently as possible in accordance with IJCER standards for integrity and objectivity.
A Novel Method for Detection of Architectural Distortion in MammogramIDES Editor
Among various breast abnormalities architectural
distortion is the most difficult type of tumor to detect. When
area of interest is medical image data, the major concern is to
develop methodologies which are faster in computation and
relatively noise free in processing. This paper is an extension
of our own work where we propose a hybrid methodology that
combines a Gabor filtration with directional filters over the
directional spectrum for digitized mammogram processing.
The most commendable thing in comparison to other
approaches is that complexity has been lowered as well as the
computation time has also been reduced to a large extent. On
the MIAS database we achieved a sensitivity of 89 %.
IRJET- Image Processing for Brain Tumor Segmentation and ClassificationIRJET Journal
This document presents a method for segmenting and classifying brain tumors in MR images using image processing techniques. It involves pre-processing images using adaptive histogram equalization, extracting features using discrete wavelet transform (DWT) and principal component analysis (PCA) for dimension reduction. Texture and statistical features are then extracted and classifiers like support vector machine (SVM), K-nearest neighbors (KNN) and neural networks are used to classify tumors as benign, malignant or pituitary. The method is evaluated on a brain tumor dataset containing MR images of different tumor types and shows promise for automatic brain tumor segmentation and classification.
Multimodal Medical Image Fusion Based On SVDIOSR Journals
Image fusion is a promising process in the field of medical image processing, the idea behind is to
improve the content of medical image by combining two or more multimodal medical images. In this paper a
novel fusion framework based on singular value decomposition - based image fusion algorithm is proposed.
SVD is an image adaptive transform, it transforms the matrix of the given image into product USVT
, which
allows to refactor a digital image into three matrices called tensors. The proposed algorithm picks out
informative image patches of source images to constitute the fused image by processing the divided subtensors
rather than the whole tensor and a novel sigmoid-function-like coefficient-combining scheme is applied to
construct the fused result. Experimental results show that the proposed algorithm is an alternative image fusion
approach.
An Effective Tea Leaf Recognition Algorithm for Plant Classification Using Ra...IJMER
A leaf is an organ of a vascular plant, as identified in botanical terms, and in particular in plant morphology. Naturally a leaf is a thin, flattened organ bear above ground and it is mainly used for photosynthesis. Recognition of plants has become an active area of research as most of the plant species are at the risk of extinction. Most of the leaves cannot be recognized easily since some are not flat (e.g. succulent leaves and conifers), some does not grow above ground (e.g. bulb scales), and some does not undergo photosynthetic function (e.g. cataphylls, spines, and cotyledons).In this paper, we mainly focused on tea leaves to identify the leaf type for improving tea leaf classification. Tea leaf images are loaded from digital cameras or scanners in the system. This proposed approach consists of three phases such as preprocessing, feature extraction and classification to process the loaded image. The tea leaf images can be identified accurately in the preprocessing phase by fuzzy denoising using Dual Tree Discrete Wavelet Transform (DT-DWT) in order to remove the noisy features and boundary enhancement to obtain the shape of leaf accurately. In the feature extraction phase, Digital Morphological Features (DMFs) are derived to improve the classification accuracy. Radial Basis Function (RBF) is used for efficient classification. The RBF is trained by 60 tea leaves to classify them into 6 types. Experimental results proved that the proposed method classifies the tea leaves with more accuracy in less time. Thus, the proposed method achieves more accuracy in retrieving the leaf type.
Implementation of features dynamic tracking filter to tracing pupilssipij
The objective of this paper is to show the implementation of an artificial vision filter capable of tracking the
pupils of a person in a video sequence. There are several algorithms that can achieve this objective, for this
case, features dynamic tracking selected, which is a method that traces patterns between each frame that
form a video scene, this type of processing offers the advantage of eliminating the problems of occlusion
patterns of interest. The implementation was tested on a base of videos of people with different physical
characteristics of the eyes. An additional goal is to obtain information of the eye movements that are
captured and pupil coordinates for each of these movements. These data could help some studies related to
eye health.
This document provides a review of different methods for palmprint recognition. It begins with an introduction to palmprint recognition and the general architecture of a palmprint recognition system, which includes image acquisition, preprocessing, feature extraction, and matching. The document then reviews several related works on palmprint recognition methods. These methods extract different features from palmprint images such as principal lines, minutiae, orientation, and texture. Feature extraction is followed by matching, where templates are compared to determine similarity. The document analyzes and compares the different palmprint recognition approaches.
Segmentation of Brain MR Images for Tumor Extraction by Combining Kmeans Clus...CSCJournals
Segmentation of images holds an important position in the area of image processing. It becomes more important while typically dealing with medical images where pre-surgery and post surgery decisions are required for the purpose of initiating and speeding up the recovery process [5] Computer aided detection of abnormal growth of tissues is primarily motivated by the necessity of achieving maximum possible accuracy. Manual segmentation of these abnormal tissues cannot be compared with modern day’s high speed computing machines which enable us to visually observe the volume and location of unwanted tissues. A well known segmentation problem within MRI is the task of labeling voxels according to their tissue type which include White Matter (WM), Grey Matter (GM) , Cerebrospinal Fluid (CSF) and sometimes pathological tissues like tumor etc. This paper describes an efficient method for automatic brain tumor segmentation for the extraction of tumor tissues from MR images. It combines Perona and Malik anisotropic diffusion model for image enhancement and Kmeans clustering technique for grouping tissues belonging to a specific group. The proposed method uses T1, T2 and PD weighted gray level intensity images. The proposed technique produced appreciative results
Instant fracture detection using ir-raysijceronline
International Journal of Computational Engineering Research (IJCER) is dedicated to protecting personal information and will make every reasonable effort to handle collected information appropriately. All information collected, as well as related requests, will be handled as carefully and efficiently as possible in accordance with IJCER standards for integrity and objectivity.
A Novel Method for Detection of Architectural Distortion in MammogramIDES Editor
Among various breast abnormalities architectural
distortion is the most difficult type of tumor to detect. When
area of interest is medical image data, the major concern is to
develop methodologies which are faster in computation and
relatively noise free in processing. This paper is an extension
of our own work where we propose a hybrid methodology that
combines a Gabor filtration with directional filters over the
directional spectrum for digitized mammogram processing.
The most commendable thing in comparison to other
approaches is that complexity has been lowered as well as the
computation time has also been reduced to a large extent. On
the MIAS database we achieved a sensitivity of 89 %.
IRJET- Image Processing for Brain Tumor Segmentation and ClassificationIRJET Journal
This document presents a method for segmenting and classifying brain tumors in MR images using image processing techniques. It involves pre-processing images using adaptive histogram equalization, extracting features using discrete wavelet transform (DWT) and principal component analysis (PCA) for dimension reduction. Texture and statistical features are then extracted and classifiers like support vector machine (SVM), K-nearest neighbors (KNN) and neural networks are used to classify tumors as benign, malignant or pituitary. The method is evaluated on a brain tumor dataset containing MR images of different tumor types and shows promise for automatic brain tumor segmentation and classification.
Multimodal Medical Image Fusion Based On SVDIOSR Journals
Image fusion is a promising process in the field of medical image processing, the idea behind is to
improve the content of medical image by combining two or more multimodal medical images. In this paper a
novel fusion framework based on singular value decomposition - based image fusion algorithm is proposed.
SVD is an image adaptive transform, it transforms the matrix of the given image into product USVT
, which
allows to refactor a digital image into three matrices called tensors. The proposed algorithm picks out
informative image patches of source images to constitute the fused image by processing the divided subtensors
rather than the whole tensor and a novel sigmoid-function-like coefficient-combining scheme is applied to
construct the fused result. Experimental results show that the proposed algorithm is an alternative image fusion
approach.
IRJET- Blood Vessel Segmentation & Analysis in Retinal Images using Image Pro...IRJET Journal
This document discusses a proposed method for segmenting and analyzing blood vessels in retinal images using image processing techniques. It begins with an abstract that outlines segmenting retinal images to extract blood vessels in order to analyze features like thickness and width that can help in diagnosing diseases. It then provides more details on the proposed method which includes steps like image segmentation, vessel enhancement filtering using techniques like median filtering, morphological reconstruction filtering, and using a K-nearest neighbors algorithm for classification. The key steps and techniques are illustrated through a flowchart and example results of applying the method to a retinal image.
Abstract:
A technique for exudate detectionin fundus image is been presented in this paper. Due to diabetic retinopathy an abnormality is caused known as exudates.The loss of vision can be prevented by detecting the exudates as early as possible. The work mainly aims at detecting exudates which is present in the green channel of the RGB image by applying few preprocessing steps, DWT and feature extraction. The extracted features are fed to 3 different classifiers such as KNN, SVM and NN. Based on the classifier result if an exudate is present the extraction of exudate ROI is done based on canny edge detection followed by morphological operations. The severity of the exudates is established on the area of the detected exudate.
Keywords:Exudates, Fundus image, Diabetic retinopathy, DWT, KNN, SVM, NN, Canny edge detection, Morphological operations.
IRJET- A Plant Identification and Recommendation SystemIRJET Journal
This document describes a plant identification and recommendation system that uses image recognition techniques. The system takes an image of a leaf as input, preprocesses it by resizing, converting to grayscale, and extracting features. It then uses a convolutional neural network with the Inception-v3 model to identify the plant by comparing features to those in its database. Based on the identified plant, it recommends other plants that could grow in that location. The system is implemented as both a mobile app and web application to be accessible anywhere.
Brain tumor detection and segmentation using watershed segmentation and morph...eSAT Journals
This document describes a method for detecting and segmenting brain tumors from MRI images using watershed segmentation and morphological operations. The method involves preprocessing the MRI image, removing the skull via thresholding, segmenting the brain tissue using marker-controlled watershed segmentation, detecting the tumor region using erosion-based morphological operations, calculating the tumor area, and determining the tumor location. The method was implemented in MATLAB and experimental results demonstrated that it could accurately extract and detect tumor regions from brain MRI images.
There are three major complications of diabetes which lead to blindness. They are retinopathy, cataracts, and glaucoma among which diabetic retinopathy is considered as the most serious complication affecting the blood vessels in the retina. Diabetic retinopathy (DR) occurs when tiny vessels swell and leak fluid or abnormal new blood vessels grow hampering normal vision.
Diabetic retinopathy is a widespread problem of visual impairment. The abnormalities like microaneurysms, hemorrhages and exudates are the key symptoms which play an important role in diagnosis of diabetic retinopathy. Early detection of these abnormalities may prevent the blurred vision or vision loss due to diabetic retinopathy. Basically exudates are lipid lesions able to be seen in optical images. Exudates are categorized into hard exudates and soft exudates based on its appearance. Hard exudates come out as intense yellow regions and soft exudates have fuzzy manifestations. Automatic detection of exudates may aid ophthalmologists in diagnosis of diabetic retinopathy and its early treatment. Fig. 1 shows the key symptoms of diabetic retinopathy.
11.segmentation and feature extraction of tumors from digital mammogramsAlexander Decker
This document summarizes a proposed computer-aided detection (CAD) system for segmenting tumors and extracting features from digital mammograms to help radiologists diagnose breast cancer. The proposed CAD system includes five stages: 1) collecting input images and extracting regions of interest, 2) enhancing the regions of interest, 3) segmenting the tumors, 4) filtering noises, and 5) extracting texture and statistical features. Texture features like Haralick features extracted from gray-level co-occurrence matrices are calculated to classify tumors as benign or malignant. The system is tested on mammogram images from the Mammographic Image Analysis Society database to evaluate the segmentation and feature extraction methods.
Mri brain tumour detection by histogram and segmentationiaemedu
This document summarizes a research paper on detecting brain tumors in MRI images using a combination of histogram thresholding, modified gradient vector field (GVF), and morphological operators. The non-brain regions are removed using morphological operators. Histogram thresholding is then used to detect if the brain is normal or abnormal/contains a tumor. If abnormal, the modified GVF is used to detect the tumor contour. The proposed method aims to be computationally efficient by only performing segmentation if a tumor is detected. It was tested on many MRI brain images and performance was validated against human expert segmentation.
IRJET - Skin Disease Predictor using Deep LearningIRJET Journal
This document presents a skin disease prediction system built using a deep learning model. The system was trained on the Harvard HAM dataset containing images of 7 common skin diseases. Data augmentation techniques like rotation, shearing, zooming were used to improve the quality and size of the dataset. A convolutional neural network model with convolution, pooling, ReLU and fully connected layers was developed using Keras. The model achieved an accuracy of 82% and was integrated into a web-based user interface to allow users to upload images for disease prediction. Further improvements to increase accuracy require enhancing the model with more data and computational resources.
IRJET-Analysis of Face Recognition System for Different ClassifierIRJET Journal
M.Manimozhi, A. John Dhanaseely "Analysis of Face Recognition System for Different Classifier ", International Research Journal of Engineering and Technology (IRJET), Volume2,issue-01 April 2015.e-ISSN:2395-0056, p-ISSN:2395-0072. www.irjet.net .published by Fast Track Publications
Abstract
Face recognition plays vital role for authenticating system. Human Face recognition is a challenging task in computer vision and pattern recognition. Face recognition has attracted much attention due to its potential value in security and law enforcement applications and its theoretical challenges. Different methods are used for feature extraction and classification. Kernel fisher analysis is used for feature extraction. The performance analysis for Euclidean, support vector machine is evaluated. The whole process is done using MATLAB software. A set of 10 person real time images is taken for our work. The classifier recognizes the similar posture as an output.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
Intrinsic biometric, nowadays, has become a trend
in research on human identification due to some disadvantages of
the extrinsic biometric features. Extrinsic biometric features are
easily imitated and lost as they are located outside the human
body and are easy to change due to accidents. Therefore, in this
paper we focus on a method which can extract a feature from an
image of intrinsic biometric. Moreover, we use palm skin vein as
the intrinsic biometric feature for human recognition application.
The feature of an image can be extracted by using a specific
method, such as Local binary pattern (LBP), which has been
commonly used in many research works. A modified LBP, called
cross-LBP (DVHLBP), has been proposed in our previous paper.
DVHLBP has better performance compared with the
conventional LBP. In this paper, we further optimize the
DVHLBP method. In this paper, DVHLBP is used as the
extraction feature algorithm on palm vein and histogram
intersection is used for the matching process. In the simulation,
the ratio of data model to data testing was 5:5. Testing was done
by applying some scenarios. The optimization is done by
examining the number of regions that yield the optimal threshold
value. The optimal configuration is achieved when we use 8
neighborhood pixels with radius of 12, 16 regions. Simulation
results show that the false accepted rate (FAR) and false rejected
rate (FRR) are 0.01 and 0.01, respectively, with recognition rate
of 99%. In addition, we show that the optimized DVHLBP has
improvement in the accuracy and equal error rate (EER).
IRJET - Simulation of Colour Image Processing Techniques on VHDLIRJET Journal
This document summarizes research on simulating color image processing techniques using VHDL. It discusses using VHDL to implement thresholding, brightness, and inversion operations on images. The goal is to perform these operations faster than software by taking advantage of the reconfigurability and parallelism of hardware. The paper reviews related work on image processing using FPGAs and proposes simulating the image processing system using a link between MATLAB and VHDL for testing and verification.
Development and Implementation of VLSI Reconfigurable Architecture for Gabor ...Dr. Amarjeet Singh
This document presents a development of a VLSI reconfigurable architecture for a Gabor filter to be used in medical image applications, specifically for tonsillitis detection. It first provides background on Gabor filtering and its use in applications like texture analysis, object recognition, and medical image processing. It then reviews related works that have implemented Gabor filters. The document goes on to describe the proposed tonsillitis detection system, which includes modules for preprocessing, CORDIC filtering, filter generation, and convolution. It discusses simulating and synthesizing the design in Verilog and FPGA implementation. The results showed the design could operate at 394.563 MHz on an Artix 7 board.
Brain Tumor Segmentation and Extraction of MR Images Based on Improved Waters...IOSR Journals
This document summarizes a research paper about segmenting and extracting brain tumors from MR images using an improved watershed transform technique. It first preprocesses the MR images using techniques like edge enhancement to improve image quality. It then applies a marker-controlled watershed segmentation using foreground and background markers to avoid oversegmentation. The watershed transform is further improved by removing noise, adjusting pixel values, and introducing neighborhood relations between boundaries. Finally, mathematical morphology operations like erosion, dilation, opening and closing are used to get clear edges of the extracted brain tumor in the MR image.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Multitude Regional Texture Extraction for Efficient Medical Image Segmentationinventionjournals
Image processing plays a major role in evaluation of images in many concerns. Manual interpretation of the image is time consuming process and it is susceptible to human errors. Computer assisted approaches for analyzing the images have increased in latest evolution of image processing. Also it has highlighted its performance more in the field of medical sciences. Many techniques are available for the involvement in processing of images, evaluation, extraction etc. The main goal of image segmentation is cluster pixeling the regions corresponding to individual surfaces, objects, or natural parts of objects and to simplify and/or change the representation of an image into something that is more meaningful and easier to analyze. The proposed method is to conquer segmentation and texture extraction with Regional and Multitude and techniques involved in it. Ultrasound (US) is increasingly considered as a viable alternative imaging modality in computer-assisted brain segmentation and disease diagnosis applications.First for ultra sound we present region based segmentation.Homogeneous regions depends on image granularity features. Second a local threshold based multitude texture regional seed segmentation for medical image segmentation is proposed. Here extraction is done with dimensions comparable to the speckle size are to be extracted. The algorithm provides a less medical metrics awareness in a minimum user interaction environment. The shape and size of the growing regions depend on look up table entries.
Automatic detection of optic disc and blood vessels from retinal images using...eSAT Journals
Abstract Diabetic retinopathy is the common cause of blindness. This paper presents the mathematical morphology method to detect and eliminate the optic disc (OD) and the blood vessels. Detection of optic disc and the blood vessels are the necessary steps in the detection of diabetic retinopathy because the blood vessels and the optic disc are the normal features of the retinal image. And also, the optic disc and the exudates are the brightest portion of the image. Detection of optic disc and the blood vessels can help the ophthalmologists to detect the diseases earlier and faster. Optic disc and the blood vessels are detected and eliminated by using mathematical morphology methods such as closing, filling, morphological reconstruction and Otsu algorithm. The objective of this paper is to detect the normal features of the image. By using the result, the ophthalmologists can detect the diseases easily. Keywords: Blood vessels, Diabetic retinopathy, mathematical morphology, Otsu algorithm, optic disc (OD)
Microarray Data Classification Using Support Vector MachineCSCJournals
DNA microarrays allow biologist to measure the expression of thousands of genes simultaneously on a small chip. These microarrays generate huge amount of data and new methods are needed to analyse them. In this paper, a new classification method based on support vector machine is proposed. The proposed method is used to classify gene expression data recorded on DNA microarrays. It is found that the proposed method is faster than neural network and the classification performance is not less than neural network.
MRI Image Segmentation by Using DWT for Detection of Brain Tumorijtsrd
Brain tumor segmentation is one of the critical tasks in the medical image processing. Some early diagnosis of brain tumor helps in improving the treatment and also increases the survival rate of the patients. The manual segmentation for cancer diagnosis of brain tumor and generation of MRI images in clinical routine is difficult and time consuming. The aim of this research paper is to review of MRI based brain tumor segmentation methods for the treatment of cancer like diseases. The magnetic resonance imaging used for detection of tumor and diagnosis of tissue abnormalities. The computerized medical image segmentation helps the doctors in treatment in a simple way with fast decision making. The brain tumor segmentation assessed by computer based surgery, tumor growth, developing tumor growth models and treatment responses. This research focuses on the causes of brain tumor, brain tumor segmentation and its classification, MRI scanning process and different segmentation methodologies. Ishu Rana | Gargi Kalia | Preeti Sondhi ""MRI Image Segmentation by Using DWT for Detection of Brain Tumor"" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-4 , June 2019, URL: https://www.ijtsrd.com/papers/ijtsrd25116.pdf
Paper URL: https://www.ijtsrd.com/computer-science/bioinformatics/25116/mri-image-segmentation-by-using-dwt-for-detection-of-brain-tumor/ishu-rana
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
1) A study evaluated variable thinning treatments designed to restore forest structural heterogeneity and enhance ecosystem services in a mixed conifer forest in California's Sierra Nevada mountains.
2) Preliminary results found that variable thinning produced within-stand heterogeneity closest to historical conditions and the strongest understory vegetation response when combined with prescribed burning.
3) Early findings also included a slight but non-significant increase in snow accumulation and retention with variable thinning treatments. Long-term impacts on forest resilience remain to be seen.
This document summarizes an presentation on industrial protocols for penetration testers. It discusses several common industrial protocols including Modbus, Siemens S7, PROFINET, and provides information on analyzing them such as looking for patterns in hex dumps. Specific attacks are mentioned like extracting password hashes from TIA Portal project files or intercepting S7 authentication challenges and responses. Tools for scanning devices and manipulating protocols are also introduced. The presentation aims to help penetration testers evaluate security of industrial control systems.
IRJET- Blood Vessel Segmentation & Analysis in Retinal Images using Image Pro...IRJET Journal
This document discusses a proposed method for segmenting and analyzing blood vessels in retinal images using image processing techniques. It begins with an abstract that outlines segmenting retinal images to extract blood vessels in order to analyze features like thickness and width that can help in diagnosing diseases. It then provides more details on the proposed method which includes steps like image segmentation, vessel enhancement filtering using techniques like median filtering, morphological reconstruction filtering, and using a K-nearest neighbors algorithm for classification. The key steps and techniques are illustrated through a flowchart and example results of applying the method to a retinal image.
Abstract:
A technique for exudate detectionin fundus image is been presented in this paper. Due to diabetic retinopathy an abnormality is caused known as exudates.The loss of vision can be prevented by detecting the exudates as early as possible. The work mainly aims at detecting exudates which is present in the green channel of the RGB image by applying few preprocessing steps, DWT and feature extraction. The extracted features are fed to 3 different classifiers such as KNN, SVM and NN. Based on the classifier result if an exudate is present the extraction of exudate ROI is done based on canny edge detection followed by morphological operations. The severity of the exudates is established on the area of the detected exudate.
Keywords:Exudates, Fundus image, Diabetic retinopathy, DWT, KNN, SVM, NN, Canny edge detection, Morphological operations.
IRJET- A Plant Identification and Recommendation SystemIRJET Journal
This document describes a plant identification and recommendation system that uses image recognition techniques. The system takes an image of a leaf as input, preprocesses it by resizing, converting to grayscale, and extracting features. It then uses a convolutional neural network with the Inception-v3 model to identify the plant by comparing features to those in its database. Based on the identified plant, it recommends other plants that could grow in that location. The system is implemented as both a mobile app and web application to be accessible anywhere.
Brain tumor detection and segmentation using watershed segmentation and morph...eSAT Journals
This document describes a method for detecting and segmenting brain tumors from MRI images using watershed segmentation and morphological operations. The method involves preprocessing the MRI image, removing the skull via thresholding, segmenting the brain tissue using marker-controlled watershed segmentation, detecting the tumor region using erosion-based morphological operations, calculating the tumor area, and determining the tumor location. The method was implemented in MATLAB and experimental results demonstrated that it could accurately extract and detect tumor regions from brain MRI images.
There are three major complications of diabetes which lead to blindness. They are retinopathy, cataracts, and glaucoma among which diabetic retinopathy is considered as the most serious complication affecting the blood vessels in the retina. Diabetic retinopathy (DR) occurs when tiny vessels swell and leak fluid or abnormal new blood vessels grow hampering normal vision.
Diabetic retinopathy is a widespread problem of visual impairment. The abnormalities like microaneurysms, hemorrhages and exudates are the key symptoms which play an important role in diagnosis of diabetic retinopathy. Early detection of these abnormalities may prevent the blurred vision or vision loss due to diabetic retinopathy. Basically exudates are lipid lesions able to be seen in optical images. Exudates are categorized into hard exudates and soft exudates based on its appearance. Hard exudates come out as intense yellow regions and soft exudates have fuzzy manifestations. Automatic detection of exudates may aid ophthalmologists in diagnosis of diabetic retinopathy and its early treatment. Fig. 1 shows the key symptoms of diabetic retinopathy.
11.segmentation and feature extraction of tumors from digital mammogramsAlexander Decker
This document summarizes a proposed computer-aided detection (CAD) system for segmenting tumors and extracting features from digital mammograms to help radiologists diagnose breast cancer. The proposed CAD system includes five stages: 1) collecting input images and extracting regions of interest, 2) enhancing the regions of interest, 3) segmenting the tumors, 4) filtering noises, and 5) extracting texture and statistical features. Texture features like Haralick features extracted from gray-level co-occurrence matrices are calculated to classify tumors as benign or malignant. The system is tested on mammogram images from the Mammographic Image Analysis Society database to evaluate the segmentation and feature extraction methods.
Mri brain tumour detection by histogram and segmentationiaemedu
This document summarizes a research paper on detecting brain tumors in MRI images using a combination of histogram thresholding, modified gradient vector field (GVF), and morphological operators. The non-brain regions are removed using morphological operators. Histogram thresholding is then used to detect if the brain is normal or abnormal/contains a tumor. If abnormal, the modified GVF is used to detect the tumor contour. The proposed method aims to be computationally efficient by only performing segmentation if a tumor is detected. It was tested on many MRI brain images and performance was validated against human expert segmentation.
IRJET - Skin Disease Predictor using Deep LearningIRJET Journal
This document presents a skin disease prediction system built using a deep learning model. The system was trained on the Harvard HAM dataset containing images of 7 common skin diseases. Data augmentation techniques like rotation, shearing, zooming were used to improve the quality and size of the dataset. A convolutional neural network model with convolution, pooling, ReLU and fully connected layers was developed using Keras. The model achieved an accuracy of 82% and was integrated into a web-based user interface to allow users to upload images for disease prediction. Further improvements to increase accuracy require enhancing the model with more data and computational resources.
IRJET-Analysis of Face Recognition System for Different ClassifierIRJET Journal
M.Manimozhi, A. John Dhanaseely "Analysis of Face Recognition System for Different Classifier ", International Research Journal of Engineering and Technology (IRJET), Volume2,issue-01 April 2015.e-ISSN:2395-0056, p-ISSN:2395-0072. www.irjet.net .published by Fast Track Publications
Abstract
Face recognition plays vital role for authenticating system. Human Face recognition is a challenging task in computer vision and pattern recognition. Face recognition has attracted much attention due to its potential value in security and law enforcement applications and its theoretical challenges. Different methods are used for feature extraction and classification. Kernel fisher analysis is used for feature extraction. The performance analysis for Euclidean, support vector machine is evaluated. The whole process is done using MATLAB software. A set of 10 person real time images is taken for our work. The classifier recognizes the similar posture as an output.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
Intrinsic biometric, nowadays, has become a trend
in research on human identification due to some disadvantages of
the extrinsic biometric features. Extrinsic biometric features are
easily imitated and lost as they are located outside the human
body and are easy to change due to accidents. Therefore, in this
paper we focus on a method which can extract a feature from an
image of intrinsic biometric. Moreover, we use palm skin vein as
the intrinsic biometric feature for human recognition application.
The feature of an image can be extracted by using a specific
method, such as Local binary pattern (LBP), which has been
commonly used in many research works. A modified LBP, called
cross-LBP (DVHLBP), has been proposed in our previous paper.
DVHLBP has better performance compared with the
conventional LBP. In this paper, we further optimize the
DVHLBP method. In this paper, DVHLBP is used as the
extraction feature algorithm on palm vein and histogram
intersection is used for the matching process. In the simulation,
the ratio of data model to data testing was 5:5. Testing was done
by applying some scenarios. The optimization is done by
examining the number of regions that yield the optimal threshold
value. The optimal configuration is achieved when we use 8
neighborhood pixels with radius of 12, 16 regions. Simulation
results show that the false accepted rate (FAR) and false rejected
rate (FRR) are 0.01 and 0.01, respectively, with recognition rate
of 99%. In addition, we show that the optimized DVHLBP has
improvement in the accuracy and equal error rate (EER).
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International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Multitude Regional Texture Extraction for Efficient Medical Image Segmentationinventionjournals
Image processing plays a major role in evaluation of images in many concerns. Manual interpretation of the image is time consuming process and it is susceptible to human errors. Computer assisted approaches for analyzing the images have increased in latest evolution of image processing. Also it has highlighted its performance more in the field of medical sciences. Many techniques are available for the involvement in processing of images, evaluation, extraction etc. The main goal of image segmentation is cluster pixeling the regions corresponding to individual surfaces, objects, or natural parts of objects and to simplify and/or change the representation of an image into something that is more meaningful and easier to analyze. The proposed method is to conquer segmentation and texture extraction with Regional and Multitude and techniques involved in it. Ultrasound (US) is increasingly considered as a viable alternative imaging modality in computer-assisted brain segmentation and disease diagnosis applications.First for ultra sound we present region based segmentation.Homogeneous regions depends on image granularity features. Second a local threshold based multitude texture regional seed segmentation for medical image segmentation is proposed. Here extraction is done with dimensions comparable to the speckle size are to be extracted. The algorithm provides a less medical metrics awareness in a minimum user interaction environment. The shape and size of the growing regions depend on look up table entries.
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DNA microarrays allow biologist to measure the expression of thousands of genes simultaneously on a small chip. These microarrays generate huge amount of data and new methods are needed to analyse them. In this paper, a new classification method based on support vector machine is proposed. The proposed method is used to classify gene expression data recorded on DNA microarrays. It is found that the proposed method is faster than neural network and the classification performance is not less than neural network.
MRI Image Segmentation by Using DWT for Detection of Brain Tumorijtsrd
Brain tumor segmentation is one of the critical tasks in the medical image processing. Some early diagnosis of brain tumor helps in improving the treatment and also increases the survival rate of the patients. The manual segmentation for cancer diagnosis of brain tumor and generation of MRI images in clinical routine is difficult and time consuming. The aim of this research paper is to review of MRI based brain tumor segmentation methods for the treatment of cancer like diseases. The magnetic resonance imaging used for detection of tumor and diagnosis of tissue abnormalities. The computerized medical image segmentation helps the doctors in treatment in a simple way with fast decision making. The brain tumor segmentation assessed by computer based surgery, tumor growth, developing tumor growth models and treatment responses. This research focuses on the causes of brain tumor, brain tumor segmentation and its classification, MRI scanning process and different segmentation methodologies. Ishu Rana | Gargi Kalia | Preeti Sondhi ""MRI Image Segmentation by Using DWT for Detection of Brain Tumor"" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-4 , June 2019, URL: https://www.ijtsrd.com/papers/ijtsrd25116.pdf
Paper URL: https://www.ijtsrd.com/computer-science/bioinformatics/25116/mri-image-segmentation-by-using-dwt-for-detection-of-brain-tumor/ishu-rana
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This document summarizes an presentation on industrial protocols for penetration testers. It discusses several common industrial protocols including Modbus, Siemens S7, PROFINET, and provides information on analyzing them such as looking for patterns in hex dumps. Specific attacks are mentioned like extracting password hashes from TIA Portal project files or intercepting S7 authentication challenges and responses. Tools for scanning devices and manipulating protocols are also introduced. The presentation aims to help penetration testers evaluate security of industrial control systems.
The document discusses how a company called Woople builds products using an Agile design and development process. It outlines Woople's release cycle which includes requirements gathering, goal-centered design, prioritization, implementation in 2-week iterations, testing and acceptance. The presentation aims to explain Woople's methods and challenges in meeting estimates so stakeholders understand when reporting features will be ready. It emphasizes the importance of effective communication and making decisions collaboratively within the constraints of a fixed budget and priority of quality.
Emmett Smith has over 10 years of experience in research, investigations, and fraud detection. He currently works as a Research Manager for Barrow Wise Consulting, where he develops research reports, sets policies and practices for gathering research, and analyzes and presents findings to management. Previously, he worked as a Fraud Manager for HP Tech Consultants, where he developed fraud detection analytics and strategies. He also has 12 years of experience as the owner of an investigative firm, where he conducted surveillance, recorded observations, and filed court documents. Smith has strong research, analysis, communication, and technical skills.
Flowering plants reproduce sexually through a process involving flowers, pollen grains, and double fertilization. Flowers contain male stamens and female pistils that produce pollen grains and ovules. Pollen grains contain sperm cells that can fertilize the ovules, leading to the formation of seeds. Stamens contain microsporangia that undergo meiosis to form microspores, which develop into pollen grains containing vegetative and generative cells. Pollen lands on the pistil, and the generative cells divide to produce sperm cells. Double fertilization occurs when one sperm cell fuses with the egg cell to form the embryo, and another with the central cells to form the endosperm. This
PV2 Tools & Technology for Permaculture HomesteadsGrant Schultz
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Este documento presenta una introducción al concepto de DevOps. Explica que DevOps se refiere a una cultura que promueve la comunicación y colaboración entre desarrolladores de software y operaciones IT. También discute herramientas como la virtualización, contenedores como Docker, y cómo estas herramientas pueden ayudar a automatizar el proceso de desarrollo de software. El documento concluye invitando a un laboratorio práctico sobre Docker.
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This document provides an introduction to Google BigQuery, a cloud-based data warehouse that allows users to interactively query and analyze massive datasets. It begins with background on big data and technologies like Hadoop, Hive, and Spark. It then explains the differences between row-based and column-based data stores, with BigQuery using a columnar approach. The rest of the document demonstrates BigQuery through an example query on public datasets and provides pricing and resource information.
This document summarizes a presentation about dairy farm business planning. It discusses evaluating key areas of a dairy farm business, including herd production and health, facilities, and financial position. Specific factors that affect dry matter intake and milk production are examined, such as reproduction rates, udder health, milking frequency, and genetics. Financial ratios for evaluating a farm business's equity, liquidity, solvency, debt service capacity, and profitability are also outlined. The presentation provides tools and programs to help dairy farmers assess their current business and develop plans to improve profitability.
This document discusses two techniques for finger knuckle print recognition: Gabor filtering and Dual Tree Complex Wavelet Transform (DT-CWT). Gabor filtering is applied to extract spatial-frequency and orientation information from finger knuckle print images. DT-CWT is also used for feature extraction and is found to provide more discriminative features while being less computationally complex than Gabor filtering. The document analyzes the PolyU FKP database of 7920 images using both techniques and compares their performance based on metrics like false acceptance rate, true acceptance rate, and false rejection rate to evaluate the pros and cons of each approach.
A Spectral Domain Local Feature Extraction Algorithm for Face RecognitionCSCJournals
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The International Journal of Engineering and Science (The IJES)theijes
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
COMPARATIVE ANALYSIS OF MINUTIAE BASED FINGERPRINT MATCHING ALGORITHMSijcsit
Biometric matching involves finding similarity between fingerprint images.The accuracy and speed of the
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as compared to matching based on algorithm (a) with an average of 563.76 milliseconds. On accuracy,algorithm(a) performs better with an average accuracy of 0.142433 as compared to algorithm (b) with an average accuracy score of 0.004202.
OBJECT DETECTION, EXTRACTION AND CLASSIFICATION USING IMAGE PROCESSING TECHNIQUEJournal For Research
Domestic refrigerators are widely used household appliances and a large extent of energy is consumed by this system. A phase change material is a substances that can store or release significant amount of heat energy by changing the phase liquid to vapour or vice versa. So, reduction of temperature fluctuation and improvement of system performances is that main reason of using PCM enhances the heat transfer rate thus improves the COP of refrigeration as well as the quality frozen food. The release and storage rate of a refrigerator is depends upon the characteristics of refrigerators and its properties using phase change material for a certain thermal load it is found that COP of conventional refrigerator is increased . The phase change material used in chamber built manually and which surrounds the evaporator chamber of a conventional refrigerator the whole heat transfer for load given to refrigerator cabin (to evaporator) evaporator to phase change material by conduction. This system hence improves the performances of household refrigerator by increasing its compressor cut-off time and thereby minimizing electrical energy usage. The main objective is to improve the performance, cooling time period, storage capacity and to maintain the constant cooling effect for more time during power cut off hours using phase change material.
IRJET - Facial Recognition based Attendance System with LBPHIRJET Journal
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International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Face Recognition Smart Attendance System: (InClass System)IRJET Journal
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A Face Recognition Scheme Using Wavelet Based Dominant Featuressipij
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Contour evolution method for precise boundary delineation of medical imagesTELKOMNIKA JOURNAL
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Enhanced Thinning Based Finger Print RecognitionIJCI JOURNAL
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between the sample fingerprint & fingerprint under question. The main functional blocks of this system
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point Matching. The procedure of Enhanced Thinning included for the purpose of decreasing the size of the
memory space used by the fingerprint image database.
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A Spectral Domain Dominant Feature Extraction Algorithm for Palm-print Recognition
1. Hafiz Imtiaz & Shaikh Anowarul Fattah
International Journal of Image Processing (IJIP), Volume (5) : Issue (2) : 2011 130
A Spectral Domain Dominant Feature Extraction Algorithm for
Palm-print Recognition
Hafiz Imtiaz hafiz.imtiaz@live.com
Bangladesh University of Engineering and Technology
Dhaka-1000, Bangladesh
Shaikh Anowarul Fattah sfattah@princeton.edu
Bangladesh University of Engineering and Technology
Dhaka-1000, Bangladesh
Abstract
In this paper, a spectral feature extraction algorithm is proposed for palm-print recognition, which
can efficiently capture the detail spatial variations in a palm-print image. The entire image is
segmented into several spatial modules and the task of feature extraction is carried out using two
dimensional Fourier transform within those spatial modules. A dominant spectral feature selection
algorithm is proposed, which offers an advantage of very low feature dimension and results in a
very high within-class compactness and between-class separability of the extracted features. A
principal component analysis is performed to further reduce the feature dimension. From our
extensive experimentations on different palm-print databases, it is found that the performance of
the proposed method in terms of recognition accuracy and computational complexity is superior
to that of some of the recent methods.
Keywords: Spectral Feature extraction, Principal Component Analysis (PCA), Two-dimensional
Fourier Transform, Classification, Palm-print Recognition, Entropy, Modularization.
1. INTRODUCTION
Conventional ID card and password based identification methods, although very popular, are no
more reliable as before because of the use of several advanced techniques of forgery and
password-hacking. As an alternative, biometrics, such as palm-print, finger-print, face and iris
being used for authentication and criminal identification [1]. The main advantage of biometrics is
that these are not prone to theft and loss, and do not rely on the memory of their users. Moreover,
they do not change significantly over time and it is difficult for a person to alter own physiological
biometric or imitate that of other person’s. Among different biometrics, in security applications
with a scope of collecting digital identity, the palm-prints are recently getting more attention
among researchers [2, 3].
Palm-print recognition is a complicated visual task even for humans. The primary difficulty arises
from the fact that different palm-print images of a particular person may vary largely, while those
of different persons may not necessarily vary significantly. Moreover, some aspects of palm-
prints, such as variations in illumination, position, and scale, make the recognition task more
complicated [4].
Palm-print recognition methods are based on extracting unique major and minor line structures
that remain stable throughout the lifetime. In this regard, generally, either line-based or texture-
based feature extraction algorithms are employed [5]. In the line-based schemes, generally,
different edge detection methods are used to extract palm lines (principal lines, wrinkles, ridges,
etc.) [6, 7]. The extracted edges, either directly or being represented in other formats, are used
for template matching. In cases where more than one person possess similar principal lines, line
based algorithms may result in ambiguous identification. In order to overcome this limitation, the
texture-based feature extraction schemes can be used, where the variations existing in either the
2. Hafiz Imtiaz & Shaikh Anowarul Fattah
International Journal of Image Processing (IJIP), Volume (5) : Issue (2) : 2011 131
different blocks of images or the features extracted from those blocks are computed [8, 9]. In this
regard, generally, principal component analysis (PCA) or linear discriminant analysis (LDA) are
employed directly on palm-print image data or some popular transforms, such as Fourier and
discrete cosine transforms (DCT), are used for extracting features from the image data. Given the
extracted features, various classifiers, such as decision-based neural networks and Euclidean
distance based classifier, are employed for palm-print recognition [6, 7]. Despite many relatively
successful attempts to implement face or palm-print recognition system, a single approach, which
combines accuracy, robustness, and low computational burden, is yet to be developed.
In this paper, the main objective is to extract precisely spatial variations from each segment of the
entire palm-print image instead of considering a global variation pattern. An efficient feature
extraction scheme using two dimensional Fourier transform is developed, which operates within
those spatial modules to obtain dominant spectral features. It is shown that the discriminating
capabilities of the proposed features, that are extracted from the sub-images, are enhanced
because of modularization of the palm-print image. Moreover, the improvement of the quality of
the extracted features as a result of illumination adjustment has also been analyzed. Apart from
considering only the dominant spectral features, further reduction of the feature dimension is
obtained by employing the PCA. Finally, recognition task is carried out using a distance based
classifiers.
2. BRIEF DESCRIPTION OF THE PROPOSED SCHEME
A typical palm-print recognition system consists of some major steps, namely, input palm-print
image collection, pre-processing, feature extraction, classification and template storage or
database, as illustrated in Fig. 1. The input palm-print image can be collected generally by using
a palm-print scanner. In the process of capturing palm images, distortions including rotation, shift
and translation may be present in the palm images, which make it difficult to locate at the correct
position. Pre-processing sets up a coordinate system to align palm-print images and to segment a
part of palm-print image for feature extraction. For the purpose of classification, an image
database is needed to be prepared consisting template palm-images of different persons. The
recognition task is based on comparing a test palm-print image with template data. It is obvious
that considering images themselves would require extensive computations for the purpose of
comparison. Thus, instead of utilizing the raw palm-print images, some characteristic features are
extracted for preparing the template. It is to be noted that the recognition accuracy strongly
depends upon the quality of the extracted features. Therefore, the main focus of this research is
to develop an efficient feature extraction algorithm.
The proposed feature extraction algorithm is based on extracting spatial variations precisely from
the spatial modules of the palm-print image instead of utilizing the image as a whole. In view of
this, a modularization technique is employed first to segment the entire palm-print into several
small segments. It should be noted that variation of illumination of different palm-print images of
the same person may affect their similarity. Therefore, prior to feature extraction, an illumination
adjustment step is included in the proposed algorithm. After feature extraction, a classifier
compares two palm-print features and a database is used to store registered templates and also
for verification purposes.
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International Journal of Image Processing (IJIP), Volume (5) : Issue (2) : 2011 132
FIGURE 1: Block diagram of the proposed method
3. PROPOSED METHOD
For any type of biometric recognition, the most important task is to extract distinguishing features
from the template data, which directly dictates the recognition accuracy. In comparison to person
recognition based on face or voice biometrics, palm-print recognition is very challenging even for
a human being. For the case of palm-print recognition, obtaining a significant feature space with
respect to the spatial variation in a palm-print image is very crucial. Moreover, a direct subjective
correspondence between palm-print features in the spatial domain and those in the frequency
domain is not very apparent. In what follows, we are going to demonstrate the proposed feature
extraction algorithm for palm-print recognition, where spatial domain local variation is extracted
from frequency domain transform.
3.1 Spectral Feature Extraction from Spatial Modules
For biometric recognition, feature extraction can be carried out using mainly two approaches,
namely, the spatial domain approach and the frequency domain approach. The spatial domain
approach utilizes the spatial data directly from the palm-print image or employs some statistical
measure of the spatial data. On the other hand, frequency domain approaches employ some kind
of transform over the palm-print images for feature extraction and have been widely discussed
and applied in image processing [10].
It is well-known that Fourier transform based algorithms offer ease of implementation in practical
applications. Hence, we intend to develop an efficient feature extraction scheme using two
dimensional Fourier transform. For a function of size with two-dimensional (2D)
variation, the 2D discrete Fourier transform (2D-DFT) is given by [11]
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International Journal of Image Processing (IJIP), Volume (5) : Issue (2) : 2011 133
(1)
where and . Palm-prints of a person possess some
major and minor line structures along with some ridges and wrinkles. A person can be
distinguished from another person based on the differences of these major and minor line
structures. Fig. 2 shows sample palm-print images of two different persons. The three major lines
of the two persons are quite similar. They differ only in minor line structure. In this case, if we
considered the line structures of the two images locally, we may distinguish the two images.
FIGURE 2: Sample palm-print images of two persons. Square block contains portion of images
(a) without any minor line (b) with a minor line
For example, if we looked closely within the bordered regions of the palm-print images in Fig. 2,
they would seem are different. Moreover, it is evident that a small block of the palm-print image
may or may not contain the major lines but will definitely contain several minor lines. These minor
lines may not be properly enhanced or captured when operating on an image as a whole and
may not contribute to the feature vector. Hence, in that case, the feature vectors of the palm-
prints shown in Fig. 2 may be similar enough to be wrongfully identified as if they belong to the
same person. Therefore, we propose to extract features from local zones of the palm-print
images.
Figures 3(a) and 3(b) show the 400 lowest 2D-DFT coefficients of the palm-prints images of
person 1 and person 2 considered as a whole, respectively. From these figures, it is evident that
there exists no significant difference between the two transforms and hence, they are difficult to
distinguish, although the palm-print images differ in the bordered region (Fig. 2). On the other
hand, Figs. 4(a) and 4(b) show the 400 lowest 2D-DFT coefficients of the bordered regions of the
palm-print images of person 1 and person 2, respectively (shown in Fig. 2). In these two figures,
the spatial difference in the images are clearly signified in the spectral domain. Next, we compute
the Euclidean distance between the DFT coefficients shown in Figs. 3(a) and 3(b) as a measure
of similarity. Similarly, the Euclidean distance is computed for the DFT coefficients shown in Figs.
4(a) and 4(b). Fig. 5 shows a comparison between these Euclidean distances. In the former case,
where the palm-print image is considered as a whole, the value of the Euclidean distance is
smaller than that obtained in the latter case, where only the DFT coefficients of the bordered
regions are considered. This clearly indicates that better distinguishable features are extracted
from smaller modules than from the entire palm-print image as a whole. It can be observed that
within a particular palm-print image, the change in information over the entire image may not be
properly captured if the DFT operation is performed upon the image as a whole, because of the
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difference in patterns and positions of principal lines, ridges and wrinkles. Even if it is performed,
it may offer spectral features with very low between-class separation. In order to obtain high
within-class compactness as well as high between-class separability, we propose to segment the
palm-print image into some small segments, which are capable of extracting variations in image
geometry locally.
FIGURE 3: 400 lowest 2D-DFT coefficients of the entire palm-prints of (a) Person 1 shown in Fig.
2(a) and (b) Person 2 shown in Fig. 2(b)
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FIGURE 4: 400 lowest 2D-DFT coefficients of the segment of palm-prints of (a) Person 1,
corresponding to the square block shown in Fig. 2(a) and (b) Person 2, corresponding to the
square block shown in Fig. 2(b)
FIGURE 5: Comparison of Euclidean distances of the 2D-DFT coefficients of separate palm-
prints shown in Fig. 2
3.2 Effect of Illumination
Light source is one of the key components in the system to capture enough of discriminant
information for palm-print recognition. Hence, illumination adjustment is performed to eliminate
the dependence of recognition accuracy upon intensity variation. In view of analyzing the effect of
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International Journal of Image Processing (IJIP), Volume (5) : Issue (2) : 2011 136
illumination adjustment on the proposed extracted features, in Fig. 6, two sample palm-print
images of the same person are shown. The images have different illumination conditions. It is
required for a robust feature extraction scheme to ignore the difference in illumination and provide
with similar feature vectors for these two images. We perform 2D-DFT upon each image, first
without any illumination adjustment and then after performing illumination adjustment. In Fig. 7(a),
the correlation of the 2D-DFT coefficients of the two images without any illumination adjustment is
shown and in Fig. 7(b), the correlation of the 2D-DFT coefficients of the two images after
illumination adjustment is shown. Since the correlation is a measure of similarity, it is evident from
these two figures that the latter case exhibits more similarity between the DFT coefficients
indicating that the features belong to the same person. In Fig. 8, the similarity measure in terms
of Euclidian distance between the 2D-DFT coefficients of the two images for the aforementioned
two cases is shown. In case of illumination adjustment, lower value of Euclidean distance is
obtained, which clearly indicates a better similarity as well.
FIGURE 6: Two sample palm-print images of the same person under different illumination
3.3 Proposed Dominant Spectral Feature
In the proposed method, instead of taking the DFT coefficients of the entire image, the
coefficients obtained from each module of an image are considered to form a feature vector.
However, if all of these coefficients were used, it would definitely result in a feature vector with a
very large dimension. In view of reducing the feature dimension, we propose to utilize the
magnitudes corresponding to the dominant DFT coefficients as spectral features. The 2D-DFT
coefficient corresponding to the maximum magnitude is treated as the dominant coefficient.
Considering the magnitudes of the 2D-DFT coefficients in descending order, magnitude values
other than the dominant one may also be treated as possible candidates for desired features. In
accordance with their magnitude values, these dominant magnitudes are termed as second-
dominant , third-dominant , and so on. If the magnitude variations along all the
segments for the case of different dominant magnitudes remain similar, it would be very difficult to
select one of those dominant magnitudes as a desired feature.
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FIGURE 7: Correlation of the 2D-DFT coefficients of the sample palm-print images shown in Fig.
6: (a) with no illumination adjustment and (b) with illumination adjusted
FIGURE 8: Euclidian distance between 2D-DFT coefficients of sample palm-print images shown
in Fig. 6
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International Journal of Image Processing (IJIP), Volume (5) : Issue (2) : 2011 138
In order to demonstrate the characteristics of the dominant magnitudes in different modules,
sample palm-print images of two different persons are shown in Fig. 9. In Fig. 10, four dominant
magnitudes obtained from all the modules of the sample palm-print
image of Person 1 appeared in Fig. 9 are shown. In this figure, the sample palm-print image is
divided into 30 segments. It is found that the first dominant magnitude exhibits completely
different characteristics in comparison to other dominant magnitudes. The characteristics of all
other dominant magnitudes, in comparison to those of , remain almost similar. An
analogous behavior is obtained for Person 2 of Fig. 9. It is evident from the figure that is the
most significant among all the dominant magnitudes and thus, it is sufficient to consider only
as a desired feature, which also offers an advantage of reduced feature dimension. For a palm-
print image of dimension with number of segments (with dimension ),
considering only will reduce the length of feature vector from to , an order of
reduction. Computing in each narrow-width band of a palm-print image, the proposed
feature vector is obtained.
FIGURE 9: Sample palm-print images of two persons
Next, we present an experimental result in order to demonstrate the advantage of extracting the
dominant feature from the segments of a palm-print image instead of considering the entire
image as a whole. In Fig. 11, centroids of the dominant features obtained from several sample
palm-print images of two different persons (as appeared in Fig. 9) are shown considering two
different cases: (i) when features are extracted considering the entire palm-print image as a
whole and (ii) when features are extracted from each segment separately. It is observed from the
figure that, in the first case, the distance between the feature-centroids is extremely small, which
strongly discourages to extract a single global variation pattern from the entire image at a time.
However, the large between-class-separability in the second case supports the proposed feature
selection algorithm, which extracts the features from the entire image considering each local zone
separately.
It is observed that a significant variation may occur in the palm-print images of a single person
taken under different conditions. In view of demonstrating the effect of such variations on the
proposed dominant features, we consider five sample palm-prints for each of the two persons as
appeared in Fig. 9. In Fig. 12, the proposed dominant features obtained from different segments
of all the sample palm-prints of two different persons are shown. For each person, the centroid of
the proposed feature vectors is also shown in the figure (in thick continuous lines). It is to be
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International Journal of Image Processing (IJIP), Volume (5) : Issue (2) : 2011 139
noted that the feature centroids of the two different persons are well-separated even though the
major lines of the two palm-print images are quite similar considering the pattern and position. It
is also observed that a low degree of scattering exists among the features around their
corresponding centroids. Hence, the dominant features extracted locally within a palm-print image
offer not only a high degree of between-class separability but also satisfactory within-class
compactness.
FIGURE 10: Proposed dominant magnitude-features corresponding to palm-prints shown in Fig.
9
FIGURE 11: Centroids of dominant features corresponding to palm-prints shown in Fig. 9
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International Journal of Image Processing (IJIP), Volume (5) : Issue (2) : 2011 140
FIGURE 12: Variation of dominant features with segments for several palm-print images of two
persons corresponding Fig. 9
3.4 Feature Dimensionality Reduction
For the cases where the acquired palm-print are of very high resolution, even after selection of
dominant features from the small segments of the palm-print image, the feature vector length may
still be very high. Further dimensionality reduction may be employed for reduction in
computational burden.
Principal component analysis (PCA) is a very well-known and efficient orthogonal linear
transformation [12]. It reduces the dimension of the feature space and the correlation among the
feature vectors by projecting the original feature space into a smaller subspace through a
transformation. The PCA transforms the original p-dimensional feature vector into the L-
dimensional linear subspace that is spanned by the leading eigenvectors of the covariance matrix
of feature vector in each cluster (L<p). PCA is theoretically the optimum transform for given data
in the least square sense. For a data matrix, X
T
, with zero empirical mean, where each row
represents a different repetition of the experiment, and each column gives the results from a
particular probe, the PCA transformation is given by:
YT
=XT
W=VΣT
(2)
where the matrix Σ is an m×n diagonal matrix with nonnegative real numbers on the diagonal and
is the singular value decomposition of . If sample palm-print images of each person
are considered and a total of dominant DFT coefficients are selected per image, the feature
space per person would have a dimension of . For the proposed dominant spectral
features, implementation of PCA on the derived feature space could efficiently reduce the feature
dimension without losing much information. Hence, PCA is employed to reduce the dimension of
the proposed feature space.
3.5 Distance Based Classifier
In the proposed method, for the purpose of recognition using the extracted dominant features, a
distance-based similarity measure is utilized. The recognition task is carried out based on the
distances of the feature vectors of the training palm-images from the feature vector of the test
palm-image. Given the -dimensional feature vector for the -th sample image of the -th person
be and a test sample image with a feature vector
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International Journal of Image Processing (IJIP), Volume (5) : Issue (2) : 2011 141
, a similarity measure between the test image of the unknown
person and the sample images of the -th person, namely average sum-squares distance, D, is
defined as
(3)
where a particular class represents a person with number of sample palm-print images.
Therefore, according to (3), given the test sample image , the unknown person is classified as
the person among the number of classes when
(4)
4. EXPERIMENTAL RESULTS
Extensive simulations are carried out in order to demonstrate the effectiveness of the proposed
method of palm-print recognition using the palm-print images of several well-known databases.
Different analyses showing the effectiveness of the proposed feature extraction algorithm have
been shown. The performance of the proposed method in terms of recognition accuracy is
obtained and compared with those of some recent methods [9, 13].
4.1 Palm-print Databases
FIGURE 13: Sample palm-print images from the IITD database
FIGURE 14: Sample palm-print images from the IITD database after cropping
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International Journal of Image Processing (IJIP), Volume (5) : Issue (2) : 2011 142
FIGURE 15: Sample palm-print images from the PolyU database
FIGURE 16: Sample palm-print images from the PolyU database after cropping
In this section, palm-print recognition performance obtained by different methods has been
presented using two standard databases, namely, the PolyU palm-print database (version 2) [14]
and the IITD palm-print database [15]. In Figs. 13 and 15, sample palm-print images from the
PolyU database and the IITD database are shown, respectively. The PolyU database (version 2)
contains a total of 7752 palm-print images of 386 persons. Each person has 18 to 20 different
sample palm-print images taken in two different instances. The IITD database, on the other hand,
consists a total of 2791 images of 235 persons, each person having 5 to 6 different sample palm-
print images for both left hand and right hand. It can be observed from Figs. 13 and 15 that not all
the portions of the palm-print images are required to be considered for feature extraction [2]. The
portions of the images containing fingers and the black regions are discarded from the original
images to form the regions of interest (ROI) as shown in Figs. 14 and 16.
4.2 Performance Comparison
In the proposed method, dominant spectral features that are obtained from all the modules of a
particular palm-print image are used to form the feature vector of that image and the recognition
task is carried out on the reduced feature space as described in Section 3.5. The experiments
were performed following the leave-one-out cross validation rule. For simulation purposes, the
module size for the PolyU database and the IITD database has been chosen as 20x20 pixels and
15x15 pixels, respectively. For the purpose of comparison, recognition accuracy obtained using
the proposed method along with those reported in [9] and [13] are listed in Table 1. It is evident
from the table that the recognition accuracy of the proposed method is comparatively higher than
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International Journal of Image Processing (IJIP), Volume (5) : Issue (2) : 2011 143
those obtained by the other methods. The performance of the proposed method is also very
satisfactory for the IITD database (for both left hand and right hand palm-print images). An overall
recognition accuracy of 99.91% is achieved.
TABLE 1: Comparison of recognition accuracies.
5. CONCLUSIONS
In the proposed palm-print recognition scheme, instead of operating on the entire palm-print
image at a time, dominant spectral features are extracted separately from each of the modules
obtained by image-segmentation. It has been shown that because of modularization of the palm-
print image, the proposed dominant spectral features, that are extracted from the sub-images,
attain better discriminating capabilities. The proposed feature extraction scheme is shown to offer
two-fold advantages. First, it can precisely capture local variations that exist in the major and
minor lines of palm-print images, which plays an important role in discriminating different persons.
Second, it utilizes a very low dimensional feature space for the recognition task, which ensures
lower computational burden. For the task of classification, a Euclidean distance based classifier
has been employed and it is found that, because of the quality of the extracted features, such a
simple classifier can provide a very satisfactory recognition performance and there is no need to
employ any complicated classifier. From our extensive simulations on different standard palm-
print databases, it has been observed that the proposed method, in comparison to some of the
recent methods, provides excellent recognition performance.
ACKNOWLEDGEMENT
The authors would like to express their sincere gratitude towards the authorities of the
Department of Electrical and Electronic Engineering and Bangladesh University of Engineering
and Technology (BUET) for providing constant support throughout this research work.
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International Journal of Image Processing (IJIP), Volume (5) : Issue (2) : 2011 144
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