1. The document presents a method for super resolution of text images using ant colony optimization. It involves registering multiple low resolution images, fusing them, performing soft classification to assign pixel values to multiple classes, and using ant colony optimization for super resolution mapping to increase the resolution.
2. Key steps include SURF-based image registration, intensity-based and discrete wavelet transform fusion, decision tree-based soft classification, and ant colony optimization to assign pixel values based on pheromone updating to increase resolution.
3. Test cases on images with angular displacement, blurred text, etc. show that the method increases resolution successfully but can add some noise, though processing is faster than alternatives. Ant colony optimization
To get this project in ONLINE or through TRAINING Sessions,
Contact:JP INFOTECH, Old No.31, New No.86, 1st Floor, 1st Avenue, Ashok Pillar, Chennai -83. Landmark: Next to Kotak Mahendra Bank. Pondicherry Office: JP INFOTECH, #45, Kamaraj Salai, Thattanchavady, Puducherry -9. Landmark: Next to VVP Nagar Arch. Mobile: (0) 9952649690 , Email: jpinfotechprojects@gmail.com, web: www.jpinfotech.org Blog: www.jpinfotech.blogspot.com
Deep learning for image super resolutionPrudhvi Raj
Using Deep Convolutional Networks, the machine can learn end-to-end mapping between the low/high-resolution images. Unlike traditional methods, this method jointly optimizes all the layers of the image. A light-weight CNN structure is used, which is simple to implement and provides formidable trade-off from the existential methods.
발표자: 전석준(KAIST 박사과정)
발표일: 2018.8.
Super-resolution은 저해상도 이미지를 고해상도 이미지로 변환시키는 기술로 오랜기간 연구되어 온 주제입니다. 최근 딥러닝 기술이 적용됨에 따라 super-resolution 성능이 비약적으로 향상되었습니다. 저희는 스테레오 이미지를 이용하여 더 높은 해상도의 이미지를 얻는 기술을 개발하였습니다. 이에 관련 내용을 발표하고자 합니다.
1. Multi-Frame Super-Resolution
2. Learning-Based Super-Resolution
3. Stereo Imaging
4. Deep-Learning Based Stereo Super-Resolution
This paper analyzed different haze removal methods. Haze causes trouble to
many computer graphics/vision applications as it reduces the visibility of the scene. Air light and
attenuation are two basic phenomena of haze. air light enhances the whiteness in scene and on
the other hand attenuation reduces the contrast. the colour and contrast of the scene is recovered
by haze removal techniques. many applications like object detection , surveillance, consumer
electronics etc. apply haze removal techniques. this paper widely focuses on the methods of
effectively eliminating haze from digital images. it also indicates the demerits of current
techniques.
To get this project in ONLINE or through TRAINING Sessions,
Contact:JP INFOTECH, Old No.31, New No.86, 1st Floor, 1st Avenue, Ashok Pillar, Chennai -83. Landmark: Next to Kotak Mahendra Bank. Pondicherry Office: JP INFOTECH, #45, Kamaraj Salai, Thattanchavady, Puducherry -9. Landmark: Next to VVP Nagar Arch. Mobile: (0) 9952649690 , Email: jpinfotechprojects@gmail.com, web: www.jpinfotech.org Blog: www.jpinfotech.blogspot.com
Deep learning for image super resolutionPrudhvi Raj
Using Deep Convolutional Networks, the machine can learn end-to-end mapping between the low/high-resolution images. Unlike traditional methods, this method jointly optimizes all the layers of the image. A light-weight CNN structure is used, which is simple to implement and provides formidable trade-off from the existential methods.
발표자: 전석준(KAIST 박사과정)
발표일: 2018.8.
Super-resolution은 저해상도 이미지를 고해상도 이미지로 변환시키는 기술로 오랜기간 연구되어 온 주제입니다. 최근 딥러닝 기술이 적용됨에 따라 super-resolution 성능이 비약적으로 향상되었습니다. 저희는 스테레오 이미지를 이용하여 더 높은 해상도의 이미지를 얻는 기술을 개발하였습니다. 이에 관련 내용을 발표하고자 합니다.
1. Multi-Frame Super-Resolution
2. Learning-Based Super-Resolution
3. Stereo Imaging
4. Deep-Learning Based Stereo Super-Resolution
This paper analyzed different haze removal methods. Haze causes trouble to
many computer graphics/vision applications as it reduces the visibility of the scene. Air light and
attenuation are two basic phenomena of haze. air light enhances the whiteness in scene and on
the other hand attenuation reduces the contrast. the colour and contrast of the scene is recovered
by haze removal techniques. many applications like object detection , surveillance, consumer
electronics etc. apply haze removal techniques. this paper widely focuses on the methods of
effectively eliminating haze from digital images. it also indicates the demerits of current
techniques.
IJRET-V1I1P2 -A Survey Paper On Single Image and Video Dehazing MethodsISAR Publications
Most of the computer applications use digital images. Digital image processing acts an important
role in the analysis and interpretation of data, which is in the digital form. Images taken in foggy
weather condition often suffer from poor visibility and clarity. After the study of several fast
dehazing methods like Tan’s dehazing technique, Fattal’s dehazing technique and aiming Heat al
dehazing technique, Dark Channel Prior (DCP) intended by He et al is most substantive technique
for dehazing.This survey aims to study about various existing methods such as polarization, dark
channel prior, depth map based method etc. are used for dehazing.
A fast single image haze removal algorithm using color attenuation priorLogicMindtech Nologies
IMAGE PROCESSING Projects for M. Tech, IMAGE PROCESSING Projects in Vijayanagar, IMAGE PROCESSING Projects in Bangalore, M. Tech Projects in Vijayanagar, M. Tech Projects in Bangalore, IMAGE PROCESSING IEEE projects in Bangalore, IEEE 2015 IMAGE PROCESSING Projects, MATLAB Image Processing Projects, MATLAB Image Processing Projects in Bangalore, MATLAB Image Processing Projects in Vijayangar
The single image dehazing based on efficient transmission estimationAVVENIRE TECHNOLOGIES
We propose a novel haze imaging model for single image haze removal. Haze imaging model is formulated using dark channel prior (DCP), scene radiance, intensity, atmospheric light and transmission medium. The dark channel prior is based on the statistics of outdoor haze-free images. We find that, in most of the local regions which do not cover the sky, some pixels (called dark pixels) very often have very low intensity in at least one color (RGB) channel. In hazy images, the intensity of these dark pixels in that channel is mainly contributed by the air light. Therefore, these dark pixels can directly provide an accurate estimation of the haze transmission. Combining a haze imaging model and a interpolation method, we can recover a high-quality haze free image and produce a good depth map.
Literature Review on Single Image Super Resolutionijtsrd
In this paper, a detailed survey study on single image super-resolution (SR) has been presented, which aims at recovering a high-resolution (HR) image from a given low-resolution (LR) one. It is always the research emphasis because of the requirement of higher definition video displaying, such as the new generation of Ultra High Definition (UHD) TVs. Super-resolution (SR) is a popular topic of image processing that focuses on the enhancement of image resolution. In general, SR takes one or several low-resolution (LR) images as input and maps them as output images with high resolution (HR), which has been widely applied in remote sensing, medical imaging, biometric identification. Shalini Dubey | Prof. Pankaj Sahu | Prof. Surya Bazal"Literature Review on Single Image Super Resolution" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-5 , August 2018, URL: http://www.ijtsrd.com/papers/ijtsrd18339.pdf http://www.ijtsrd.com/engineering/electronics-and-communication-engineering/18339/literature-review-on-single-image-super-resolution/shalini-dubey
Depth estimation do we need to throw old things awayNAVER Engineering
발표의 개요 : Human visual system 기반의 CNN for depth estimation과 CNN inspired by conventional methods
Case1: Cross-channel stereo matching
Case2: Depth from light field
Case3: Multiview stereo
Conclusion
An efficient fusion based up sampling technique for restoration of spatially ...ijitjournal
The various up-sampling techniques available in the literature produce blurring artifacts in the upsampled,
high resolution images. In order to overcome this problem effectively, an image fusion based interpolation technique is proposed here to restore the high frequency information. The Discrete Cosine Transform interpolation technique preserves low frequency information whereas Discrete Sine Transform preserves high frequency information. Therefore, by fusing the DCT and DST based up-sampled images, more high frequency, relevant information of both the up-sampled images can be preserved in the restored,
fused image. The restoration of high frequency information lessens the degree of blurring in the fusedimage and hence improves its objective and subjective quality. Experimental result shows the proposed method achieves a Peak Signal to Noise Ratio (PSNR) improvement up to 0.9947dB than DCT interpolation and 2.8186dB than bicubic interpolation at 4:1 compression ratio.
Yoga Tutor is a software prototype developed by Senior E&TC students Gandhar Tannu, Sahil Shingvi and Yash Oswal. This project uses Digital Image Processing techniques and Computer Vision algorithm to detect positional errors in Yoga postures.
This project was developed in 6 months by the students. For their efforts, students were rewarded with average score of 142 marks out of maximum 150 (94%).
IJRET-V1I1P2 -A Survey Paper On Single Image and Video Dehazing MethodsISAR Publications
Most of the computer applications use digital images. Digital image processing acts an important
role in the analysis and interpretation of data, which is in the digital form. Images taken in foggy
weather condition often suffer from poor visibility and clarity. After the study of several fast
dehazing methods like Tan’s dehazing technique, Fattal’s dehazing technique and aiming Heat al
dehazing technique, Dark Channel Prior (DCP) intended by He et al is most substantive technique
for dehazing.This survey aims to study about various existing methods such as polarization, dark
channel prior, depth map based method etc. are used for dehazing.
A fast single image haze removal algorithm using color attenuation priorLogicMindtech Nologies
IMAGE PROCESSING Projects for M. Tech, IMAGE PROCESSING Projects in Vijayanagar, IMAGE PROCESSING Projects in Bangalore, M. Tech Projects in Vijayanagar, M. Tech Projects in Bangalore, IMAGE PROCESSING IEEE projects in Bangalore, IEEE 2015 IMAGE PROCESSING Projects, MATLAB Image Processing Projects, MATLAB Image Processing Projects in Bangalore, MATLAB Image Processing Projects in Vijayangar
The single image dehazing based on efficient transmission estimationAVVENIRE TECHNOLOGIES
We propose a novel haze imaging model for single image haze removal. Haze imaging model is formulated using dark channel prior (DCP), scene radiance, intensity, atmospheric light and transmission medium. The dark channel prior is based on the statistics of outdoor haze-free images. We find that, in most of the local regions which do not cover the sky, some pixels (called dark pixels) very often have very low intensity in at least one color (RGB) channel. In hazy images, the intensity of these dark pixels in that channel is mainly contributed by the air light. Therefore, these dark pixels can directly provide an accurate estimation of the haze transmission. Combining a haze imaging model and a interpolation method, we can recover a high-quality haze free image and produce a good depth map.
Literature Review on Single Image Super Resolutionijtsrd
In this paper, a detailed survey study on single image super-resolution (SR) has been presented, which aims at recovering a high-resolution (HR) image from a given low-resolution (LR) one. It is always the research emphasis because of the requirement of higher definition video displaying, such as the new generation of Ultra High Definition (UHD) TVs. Super-resolution (SR) is a popular topic of image processing that focuses on the enhancement of image resolution. In general, SR takes one or several low-resolution (LR) images as input and maps them as output images with high resolution (HR), which has been widely applied in remote sensing, medical imaging, biometric identification. Shalini Dubey | Prof. Pankaj Sahu | Prof. Surya Bazal"Literature Review on Single Image Super Resolution" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-5 , August 2018, URL: http://www.ijtsrd.com/papers/ijtsrd18339.pdf http://www.ijtsrd.com/engineering/electronics-and-communication-engineering/18339/literature-review-on-single-image-super-resolution/shalini-dubey
Depth estimation do we need to throw old things awayNAVER Engineering
발표의 개요 : Human visual system 기반의 CNN for depth estimation과 CNN inspired by conventional methods
Case1: Cross-channel stereo matching
Case2: Depth from light field
Case3: Multiview stereo
Conclusion
An efficient fusion based up sampling technique for restoration of spatially ...ijitjournal
The various up-sampling techniques available in the literature produce blurring artifacts in the upsampled,
high resolution images. In order to overcome this problem effectively, an image fusion based interpolation technique is proposed here to restore the high frequency information. The Discrete Cosine Transform interpolation technique preserves low frequency information whereas Discrete Sine Transform preserves high frequency information. Therefore, by fusing the DCT and DST based up-sampled images, more high frequency, relevant information of both the up-sampled images can be preserved in the restored,
fused image. The restoration of high frequency information lessens the degree of blurring in the fusedimage and hence improves its objective and subjective quality. Experimental result shows the proposed method achieves a Peak Signal to Noise Ratio (PSNR) improvement up to 0.9947dB than DCT interpolation and 2.8186dB than bicubic interpolation at 4:1 compression ratio.
Yoga Tutor is a software prototype developed by Senior E&TC students Gandhar Tannu, Sahil Shingvi and Yash Oswal. This project uses Digital Image Processing techniques and Computer Vision algorithm to detect positional errors in Yoga postures.
This project was developed in 6 months by the students. For their efforts, students were rewarded with average score of 142 marks out of maximum 150 (94%).
Deep learning for image super resolutionPrudhvi Raj
Using Deep Convolutional Networks, the machine can learn end-to-end mapping between the low/high-resolution images. Unlike traditional methods, this method jointly optimizes all the layers of the image. A light-weight CNN structure is used, which is simple to implement and provides formidable trade-off from the existential methods.
For the full video of this presentation, please visit:
http://www.embedded-vision.com/platinum-members/embedded-vision-alliance/embedded-vision-training/videos/pages/sept-2014-member-meeting-scottkrig
For more information about embedded vision, please visit:
http://www.embedded-vision.com
Scott Krig, author of the book "Computer Vision Metrics: Survey, Taxonomy, and Analysis," delivers the presentation "Introduction to Feature Descriptors in Vision: From Haar to SIFT" at the September 2014 Embedded Vision Alliance Member Meeting.
Single Image Super-Resolution from Transformed Self-Exemplars (CVPR 2015)Jia-Bin Huang
Self-similarity based super-resolution (SR) algorithms are able to produce visually pleasing results without extensive training on external databases. Such algorithms exploit the statistical prior that patches in a natural image tend to recur within and across scales of the same image. However, the internal dictionary obtained from the given image may not always be sufficiently expressive to cover the textural appearance variations in the scene. In this paper, we extend self-similarity based SR to overcome this drawback. We expand the internal patch search space by allowing geometric variations. We do so by explicitly localizing planes in the scene and using the detected perspective geometry to guide the patch search process. We also incorporate additional affine transformations to accommodate local shape variations. We propose a compositional model to simultaneously handle both types of transformations. We extensively evaluate the performance in both urban and natural scenes. Even without using any external training databases, we achieve significantly superior results on urban scenes, while maintaining comparable performance on natural scenes as other state-of-the-art SR algorithms.
http://bit.ly/selfexemplarsr
Video surveillance is active research topic in
computer vision research area for humans & vehicles, so it is
used over a great extent. Multiple images generated using a fixed
camera contains various objects, which are taken under different
variations, illumination changes after that the object’s identity
and orientation are provided to the user. This scheme is used to
represent individual images as well as various objects classes in a
single, scale and rotation invariant model.The objective is to
improve object recognition accuracy for surveillance purposes &
to detect multiple objects with sufficient level of scale
invariance.Multiple objects detection& recognition is important
in the analysis of video data and higher level security system. This
method can efficiently detect the objects from query images as
well as videos by extracting frames one by one. When given a
query image at runtime, by generating the set of query features
and it will find best match it to other sets within the database.
Using SURF algorithm find the database object with the best
feature matching, then object is present in the query image.
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.
This slide best explains the introduction of CT, basis and types of CT image reconstructions with detailed explanation about Interpolation, convolution, Fourier slice theorem, Fourier transformation and brief explanation about the image domain i.e digital image processing.
EFFICIENT IMAGE RETRIEVAL USING REGION BASED IMAGE RETRIEVALsipij
Early image retrieval techniques were based on textual annotation of images. Manual annotation of images
is a burdensome and expensive work for a huge image database. It is often introspective, context-sensitive
and crude. Content based image retrieval, is implemented using the optical constituents of an image such
as shape, colour, spatial layout, and texture to exhibit and index the image. The Region Based Image
Retrieval (RBIR) system uses the Discrete Wavelet Transform (DWT) and a k-means clustering algorithm
to segment an image into regions. Each region of the image is represented by a set of optical
characteristics and the likeness between regions and is measured using a particular metric function on
such characteristics
Design and implementation of video tracking system based on camera field of viewsipij
The basic idea of this paper is to design and implement of video tracking system based on Camera Field of
View (CFOV), Otsu’s method was used to detect targets such as vehicles and people. Whereas most
algorithms were spent a lot of time to execute the process, an algorithm was developed to achieve it in a
little time. The histogram projection was used in both directional to detect target from search region,
which is robust to various light conditions in Charge Couple Device (CCD) camera images and saves
computation time.
Our algorithm based on background subtraction, and normalize cross correlation operation from a series
of sequential sub images can estimate the motion vector. Camera field of view (CFOV) was determined and
calibrated to find the relation between real distance and image distance. The system was tested by
measuring the real position of object in the laboratory and compares it with the result of computed one. So
these results are promising to develop the system in future.
A NOVEL APPROACH FOR SEGMENTATION OF SECTOR SCAN SONAR IMAGES USING ADAPTIVE ...ijistjournal
The SAR and SAS images are perturbed by a multiplicative noise called speckle, due to the coherent nature of the scattering phenomenon. If the background of an image is uneven, the fixed thresholding technique is not suitable to segment an image using adaptive thresholding method. In this paper a new Adaptive thresholding method is proposed to reduce the speckle noise, preserving the structural features and textural information of Sector Scan SONAR (Sound Navigation and Ranging) images. Due to the massive proliferation of SONAR images, the proposed method is very appealing in under water environment applications. In fact it is a pre- treatment required in any SONAR images analysis system. The results obtained from the proposed method were compared quantitatively and qualitatively with the results obtained from the other speckle reduction techniques and demonstrate its higher performance for speckle reduction in the SONAR images.
A NOVEL APPROACH FOR SEGMENTATION OF SECTOR SCAN SONAR IMAGES USING ADAPTIVE ...ijistjournal
The SAR and SAS images are perturbed by a multiplicative noise called speckle, due to the coherent nature of the scattering phenomenon. If the background of an image is uneven, the fixed thresholding technique is not suitable to segment an image using adaptive thresholding method. In this paper a new Adaptive thresholding method is proposed to reduce the speckle noise, preserving the structural features and textural information of Sector Scan SONAR (Sound Navigation and Ranging) images. Due to the massive proliferation of SONAR images, the proposed method is very appealing in under water environment applications. In fact it is a pre- treatment required in any SONAR images analysis system. The results obtained from the proposed method were compared quantitatively and qualitatively with the results obtained from the other speckle reduction techniques and demonstrate its higher performance for speckle reduction in the SONAR images.
ER Publication,
IJETR, IJMCTR,
Journals,
International Journals,
High Impact Journals,
Monthly Journal,
Good quality Journals,
Research,
Research Papers,
Research Article,
Free Journals, Open access Journals,
erpublication.org,
Engineering Journal,
Science Journals,
Wavelet Transform based Medical Image Fusion With different fusion methodsIJERA Editor
This paper proposes wavelet transform based image fusion algorithm, after studying the principles and characteristics of the discrete wavelet transform. Medical image fusion used to derive useful information from multimodality medical images. The idea is to improve the image content by fusing images like computer tomography (CT) and magnetic resonance imaging (MRI) images, so as to provide more information to the doctor and clinical treatment planning system. This paper based on the wavelet transformation to fused the medical images. The wavelet based fusion algorithms used on medical images CT and MRI, This involve the fusion with MIN , MAX, MEAN method. Also the result is obtained. With more available multimodality medical images in clinical applications, the idea of combining images from different modalities become very important and medical image fusion has emerged as a new promising research field
SLIC Superpixel Based Self Organizing Maps Algorithm for Segmentation of Micr...IJAAS Team
We can find the simultaneous monitoring of thousands of genes in parallel Microarray technology. As per these measurements, microarray technology have proven powerful in gene expression profiling for discovering new types of diseases and for predicting the type of a disease. Gridding, Intensity extraction, Enhancement and Segmentation are important steps in microarray image analysis. This paper gives simple linear iterative clustering (SLIC) based self organizing maps (SOM) algorithm for segmentation of microarray image. The clusters of pixels which share similar features are called Superpixels, thus they can be used as mid-level units to decrease the computational cost in many vision applications. The proposed algorithm utilizes superpixels as clustering objects instead of pixels. The qualitative and quantitative analysis shows that the proposed method produces better segmentation quality than k-means, fuzzy cmeans and self organizing maps clustering methods.
3. SCOPE
Recover original text image from
quantization noise and grid-alignment
effects that introduce errors in the low-
resolution image
Avoid artifacts in the high-resolution
image such as blurry edges and
rounded corners
Super resolution address the lack of
sharpness in the text image
4. LITERATURE STUDY
S.
No:
REFERENCE PAPER AND
AUTHOR
DESCRIPTION
1. JOINT IMAGE
REGISTRATION AND
SUPER-RESOLUTION
FROM LOW-
RESOLUTION IMAGES
WITH ZOOMING
MOTION by Yushuang
Tian and Kim-Hui Yap,
Senior Member, IEEE –
July 2013
This paper proposes a new framework for
joint
image registration and high-resolution (HR)
image reconstruction from multiple low-
resolution (LR) observations with zooming
motion. Conventional super-resolution (SR)
methods typically formulate the SR
problem as a two-stage process, namely,
image registration followed by HR
reconstruction
2. LEARNING SPATIALLY-
VARIABLE FILTERS
FOR SUPER-
RESOLUTION OF TEXT
by Adrian Corduneanu
and John C. Platt - 2005
The algorithm for super-resolution of text
magnifies images in real-time by
interpolation with a variable linear filter. The
coefficients of the filter are determined
nonlinearly from the neighborhood to which
it is applied. We train the mapping that
defines the coefficients to specifically
enhance edges of text, producing a
conservative algorithm that infers the detail
of magnified text
5. S.
No:
REFERENCE PAPER AND
AUTHOR
DESCRIPTION
3. ANT COLONY
OPTIMIZATION FOR
IMAGE
REGULARIZATION
BASED ON A
NONSTATIONARY
MARKOV MODELING by
Sylvie Le Hégarat-Mascle,
Abdelaziz Kallel, and
Xavier Descombes –
March 2007
The ants collect information through the
image, from one pixel to the others. The
choice of the path is a function of the pixel
label, favoring paths within the same image
segment. We show that this corresponds to
an automatic adaptation of the
neighborhood to the segment form, and that
it outperforms the fixed-form neighborhood
used in classical
Markov random field regularization
techniques
4. ANT COLONY
OPTIMIZATION BASED
FUZZY IMAGE FILTER
DESIGN FOR REMOVAL
OF IMPULSE NOISES by
Min-Chi Kao, Chia-Hung
Lin, and Tzuu-Hseng S. Li
– June 2013
The fuzzy system is utilized to
improve the traditional median filter, and an
ant colony optimization (ACO) algorithm is
used to adjust the parameters of fuzzy
image filter and make the filter to achieve
better
performance
6. S.
No:
REFERENCE PAPER AND
AUTHOR
DESCRIPTION
5. DISCRETE WAVELET
TRANSFORM-BASED
ANT COLONY
OPTIMIZATION FOR
EDGE DETECTION by
Aminu Muhammad,
Ibrahim Bala,
Mohammad Shukri
Salman and Alaa Eleyan
- 2013
Ant Colony Optimization (ACO) is used
to obtain the edges of an image which
is acquired from sampling and
quantization of a continuous image.
Such techniques generate a pheromone
matrix that epresents the edge
information at each pixel position on the
routes formed by ants dispatched on
the image.
6. SINGLE-FRAME TEXT
SUPER-RESOLUTION: A
BAYESIAN APPROACH
by Gerald Dalley, Bill
Freeman, Joe Marks -
2004
given a single image of text . return the
image that is generated from a
noiseless high-resolution scan. In doing
so, we : ( I ) avoid introducing artifacts
in the high-resolution image such as
blurry edges and rounded corners, (2)
recover from quantization noise and
grid-alignmont effects that introduce
errors in the low-resolution image
8. CONTROL POINT REGISTRATION
Input Image
1
Input Image
2
Select Matching Control
points
Estimate Transformation
Solve for Scale and Angle
Transform the image
Registered image
9. AUTOMATIC REGISTRATION
Input Image
1
Input Image
2
Feature Detection Using
SURF Algorithm
Extract Features
Match the relevant
features
Estimate Transformation
Recover original image
Registered image
10. FUSION - METHOD 1
(Intensity Based Fusion)
Registered
Image 1
Registere
d Image 2
Intensity 1
Intensity 2
+ Final Fused
Image
min(Intensity 1, Intensity 2)
12. Fused
Image
Identify
Classes
C2 C5
Classification Using Decision
Tree
Calculating similarity between
pixels
SOFT CLASSIFICATION
C1- 0 % C2- 25 %
C3C1 C4
C3- 50 % C4- 75 % C5- 100 %
Update class labels
Area proportional image
13. Initialize
Place each ant in each pixel in a
group
For each ant
Choose next
pixel
Find a
pixel of
class c1
Return to initial pixel
Update trace level using the tour cost for each
ant
Stopping
Criteria
Find the pixels with nearest class
c1
No
No
Yes
Yes
14. 1. REGISTRATION
Image registration is the process of
transforming different sets of data into
one coordinate system. Data may be
multiple photographs, data from different
sensors, times, depths, or viewpoints.
It is used in computer vision, medical
imaging, military automatic target
recognition, and compiling and analyzing
images and data from satellites.
Registration is necessary in order to be
able to compare or integrate the data
obtained from these
15. When a picture is scanned using the
same sensor multiple times, there will
be disorientation in the pixel alignment
of the images.
There are three types of alignment
disorder
Vertical disorder
Horizontal Disorder
Angular Disorder
17. STEPS FOR AUTOMATIC
REGISTRATION
1. Find Matching Features Between
Images
2. Detect features in both images
3. Extract feature descriptors
4. Match features by using their
descriptors
5. Retrieve locations of corresponding
points for each image
6. Estimate Transformation
7. Solve for Scale and Angle
18. PSEUDO CODE
do
do
do
for all interest area in given input image,
calculate Hessian Matrix H (5×5)
end
Identify two interest area with same determinant value;
Mark as a feature;
end
divide the feature (interest area) into 4×4 subarea;
find deviation in x and y axis (estimating transformation);
get the angle of deviation as a trace of Hessian matrix;
recover the original image by inverse transformation;
end
19. ALGORITHM USED
SURF Algorithm
1. Detection
Automatically identify interesting features
2. Description
Each interest point should have a unique description
that does not depend on the features scale and
rotation.
3. Matching
Given and input image, determine which objects it
contains, and possibly a transformation of the object,
based on predetermined interest points.
26. FUSION METHOD 1
Image fusion is the process of
combining relevant information from
two or more images into a single
image
The resulting image will be more
informative than any of the input
images
31. COMPARISON
Fusion of images registered using
Automatic Feature Detection is
always better than that registered
using Control Point Registration
32. MATHEMATICAL NOTATION FOR FUSION
The samples are passed through a low pass
filter with impulse response g resulting in a
convolution of the two
The signal is also decomposed simultaneously us
a high-pass filter. The outputs giving the detail
coefficients h and approximation coefficients g
33. 2. SOFT CLASSIFICATION
(FUZZY CLASSIFICATION)
Multiple images will not have distinct
values in a pixel.
Pixel information is taken as a vector
of multiple classes.
For higher resolution of the same
image, the vector information can be
used to resolve the percentage of
different class (black &white)
34. PSEUDO CODE
do
for each pixel use decision tree classification
Initialize: Set value for maximum no. of iteration. Set
maxItem(i)=-1 for each pixel i.
while item<maxItem
Start: for each pixel Ni
Initialize: Set the initial maximum similarity
maxSimilarity=0
For each tile center Nj from a 2 region Size*2
regionSizesquare neighborhood around Ni
1.Determine the 3×3 image patches INi and INj which
include the central pixel Nj, respectively
2.Calculate the pixel Similarity S(I,j) for Ni and Nj
If maxSimilarity < S(I,j)
maxSimilarity=S(I,j); l(i)=j
Item=item+1;
end
35. PIXEL INTENSITY SIMILARITY is
defined as
where ri,j,k denotes the kth pixel intensity
quotient of the patches INi
and INj
P(ri,j,k) is the Probability Distribution Function
FORMULA
36. FORMULA
The Pixel Location Distance is defined
as
where xi, yi, xj, yj are the spatial coordinates of Ni a
Nj , respectively. The Euclidean distance dXY (i, j) d
the pixel location distance
39. SUPER RESOLUTION
MAPPING
REDUCE PIXEL SIZE:
Increase the number of pixels per unit
area.
Advantage:
Increases spatial resolution.
Disadvantage:
Noise introduced.
40. SUPER RESOLUTION
If the weight of the pixel is 100% then we
can
automatically fill the corresponding pixels
41. Techniques for super resolution
mapping
Hopfield Neural Networks
Genetic Algorithm
Support Vector Machine
Ant Colony Optimization
42. PSEUDO CODE
do
For all n , that is n = 1 : N identify the search starting point
and; initial value of each element of pheromone matrix t(
0)
do
For all m, that is m = 1 : M i.e M <= N
do
for every ant k=I:K
do
Locate the present position by the moving ants
and pheromone update, and then store r( n)
position
end
Update visited Pixel
end
end
end
44. INITIALIZATION STAGE
The Heuristic Matrix is calculated after the
initialization of the ants search position and
is given as
where Vc is the variation in intensity, Ii,j is the
intensity value and Z is the normalization factor
given as,
47. DECISION
Here decision is made whether the ants are
moved or not, in reference to the pre-assign
Value called threshold as given by
Then determine the T(MBT) and T(MAT) which
are mean below and above threshold respectively
using T.
here T(i) is the threshold value,
61. OUTPUT QUALITY
EVALUATION
CORRELATION FACTOR
(with reference to ideal image)
Noise Measurement of Peak Signal to
Noise Ratio PSNR
(with reference to ideal image)
Soft Classified Image Ant Colony
Optimization
Soft Classified
Image
Ant Colony
Optimization
Test case 1 0.4672 0.4753 21.8221 21.5878
Test case 2 0.2528 0.2626 18.0467 17.8114
Test case 3 0.3320 0.3594 18.3712 18.1159
Test case 4 0.3446 0.3608 17.2401 16.8948
62. CONCLUSION
Using Ant Colony Optimization for super
resolution enhances quality of texts but
add noises to the image for some
characters.
Eliminating those noises at pixel level is
difficult.
But using Ant colony optimization for
super resolution takes only less time.
So in the case where small amount of
noises are acceptable and if the
processing is to be made quickly then
Ant Colony Optimization can be adopted
for super resolution mapping of text
images.
63. REFERENCES
Yushuang Tian and Kim-Hui Yap, “Joint Image Registration and Super-
Resolution from Low-Resolution Images with Zooming Motion”, IEEE
Transactions on Circuits and Systems for Video Technology, Vol. 23, No.
7, July 2013.
Hankui Zhang , Bo Huang , “Support Vector Regression-based
Downscaling for Intercalibration of Multiresolution Satellite Images”,
IEEE Transactions on Geoscience and Remote Sensing, 2013.
Aminu Muhammad, Ibrahim Bala, Mohammad Shukri Salman and Alaa
Eleyan , ”Discrete Wavelet Transform-based Ant Colony Optimization for
Edge Detection”.
Robert A. Ulichney and Donald E. Troxel , “Scaling Binary Images with
the Telescoping Template”, IEEE Transactions on Pattern Analysis and
Machine Intelligence, Vol. 3, May 1982.
Sylvie Le Hégarat-Mascle, Abdelaziz Kallel and Xavier Descombes ,
“Ant Colony Optimization for Image Regularization based on a
Nonstationary Markov Modeling”, IEEE Transactions on Image
Processing, Vol. 16, No. 3, March 2007.
Adrian Corduneanu and John C. Platt, ”Learning Spatially-Variable
Filters for Super-Resolution of Text”.
Gerald Dalley, Bill Freeman, Joe Marks , “SINGLE-FRAME TEXT
SUPER-RESOLUTION: A BAYESIAN APPROACH” , International
Conference on Image Processing (ICIP), 2004.