The largest organ of the body is human skin. Melanoma is a fastest growing & deadliest cancer which starts in pigment cells (melanocytes) of the skin that mostly occurs on the exposed parts of the body. Early detection is vital in treating this type of skin cancer but the time and effort required is immense. Dermoscopy is a non invasive skin imaging technique of acquiring a magnified and illuminated image of a region of skin for increased clarity of the spots on the skin The use of machine learning and automation of the process involved in detection will not only save time but will also provide a more accurate diagnosis. The skin images collected from the databases cannot be directly classified by the automation techniques. The reason is twofold: (a) Lack of clarity in the features which is mainly due to the poor contrast of the raw image and (b) Large dimensions of the input image which causes the complexity of the system. Hence, suitable techniques must be adopted prior to the image classification process to overcome these drawbacks. The first drawback can be minimized by adopting suitable pre- processing techniques which can enhance the contrast of the input images. The second drawback is solved by incorporating the feature extraction technique which reduces the dimensions of the input image to high extent. Further, K-NN (K-Nearest Neighbor) classifier is used for classification of the given image into cancerous or non- cancerous.
Skin Cancer Detection using Digital Image Processing and Implementation using...ijtsrd
Melanoma is a serious type of skin cancer. It starts in skin cells called melanocytes. There are 3 main types of skin cancer, Melanoma, Basal and Squamous cell carcinoma. Melanoma is more likely to spread to other parts of the body. Early detection of malignant melanoma in dermoscopy images is very important and critical, since its detection in the early stage can be helpful to cure it. Computer Aided Diagnosis systems can be very helpful to facilitate the early detection of cancers for dermatologists. Image processing is a commonly used method for skin cancer detection from the appearance of affected area on the skin. In this work, a computerised method has been developed to make use of Neural Networks in the field of medical image processing. The ultimate aim of this paper is to implement cost-effective emergency support systems to process the medical images. It is more advantageous to patients. The dermoscopy image of suspect area of skin cancer is taken and it goes under various pre-processing technique for noise removal and image enhancement. Then the image is undergone to segmentation using Thresholding method. Some features of image have to be extracted using ABCD rules. In this work, Asymmetry index and Geometric features are extracted from the segmented image. These features are given as the input to classifier. Artificial Neural Network ANN with feed forward architecture is used for classification purpose. It classifies the given image into cancerous or non-cancerous. The proposed algorithm has been tested on the ISIC International Skin Imaging Collaboration 2017 training and test datasets. The ground truth data of each image is available as well, so performance of this work can evaluate quantitatively. Khaing Thazin Oo | Dr. Moe Mon Myint | Dr. Khin Thuzar Win "Skin Cancer Detection using Digital Image Processing and Implementation using ANN and ABCD Features" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-6 , October 2018, URL: http://www.ijtsrd.com/papers/ijtsrd18751.pdf
SkinCure: An Innovative Smart Phone Based Application to Assist in Melanoma E...sipij
Melanoma spreads through metastasis, and therefore it has been proven to be very fatal. Statistical
evidence has revealed that the majority of deaths resulting from skin cancer are as a result of melanoma.
Further investigations have shown that the survival rates in patients depend on the stage of the infection;
early detection and intervention of melanoma implicates higher chances of cure. Clinical diagnosis and
prognosis of melanoma is challenging since the processes are prone to misdiagnosis and inaccuracies due
to doctors’ subjectivity. This paper proposes an innovative and fully functional smart-phone based
application to assist in melanoma early detection and prevention. The application has two major
components; the first component is a real-time alert to help users prevent skin burn caused by sunlight; a
novel equation to compute the time for skin to burn is thereby introduced. The second component is an
automated image analysis module which contains image acquisition, hair detection and exclusion, lesion
segmentation, feature extraction, and classification. The proposed system exploits PH2 Dermoscopy image
database from Pedro Hispano Hospital for development and testing purposes. The image database
contains a total of 200 dermoscopy images of lesions, including normal, atypical, and melanoma cases.
The experimental results show that the proposed system is efficient, achieving classification of the normal,
atypical and melanoma images with accuracy of 96.3%, 95.7% and 97.5%, respectively.
Melanoma Skin Cancer Detection using Image Processing and Machine Learningijtsrd
Dermatological Diseases are one of the biggest medical issues in 21st century due to its highly complex and expensive diagnosis with difficulties and subjectivity of human interpretation. In cases of fatal diseases like Melanoma diagnosis in early stages play a vital role in determining the probability of getting cured. We believe that the application of automated methods will help in early diagnosis especially with the set of images with variety of diagnosis. Hence, in this article we present a completely automated system of dermatological disease recognition through lesion images, a machine intervention in contrast to conventional medical personnel based detection. Our model is designed into three phases compromising of data collection and augmentation, designing model and finally prediction. We have used multiple AI algorithms like Convolutional Neural Network and Support Vector Machine and amalgamated it with image processing tools to form a better structure, leading to higher accuracy of 85 . Vijayalakshmi M M ""Melanoma Skin Cancer Detection using Image Processing and Machine Learning"" 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/ijtsrd23936.pdf
Paper URL: https://www.ijtsrd.com/engineering/other/23936/melanoma-skin-cancer-detection-using-image-processing-and-machine-learning/vijayalakshmi-m-m
Computer Vision for Skin Cancer Diagnosis and Recognition using RBF and SOMCSCJournals
Human skin is the largest organ in our body which provides protection against heat, light, infections and injury. It also stores water, fat, and vitamin. Cancer is the leading cause of death in economically developed countries and the second leading cause of death in developing countries. Skin cancer is the most commonly diagnosed type of cancer among men and women. Exposure to UV rays, modernize diets, smoking, alcohol and nicotine are the main cause. Cancer is increasingly recognized as a critical public health problem in Ethiopia. There are three type of skin cancer and they are recognized based on their own properties. In view of this, a digital image processing technique is proposed to recognize and predict the different types of skin cancers using digital image processing techniques. Sample skin cancer image were taken from American cancer society research center and DERMOFIT which are popular and widely focuses on skin cancer research. The classification system was supervised corresponding to the predefined classes of the type of skin cancer. Combining Self organizing map (SOM) and radial basis function (RBF) for recognition and diagnosis of skin cancer is by far better than KNN, Naïve Bayes and ANN classifier. It was also showed that the discrimination power of morphology and color features was better than texture features but when morphology, texture and color features were used together the classification accuracy was increased. The best classification accuracy (88%, 96.15% and 95.45% for Basal cell carcinoma, Melanoma and Squamous cell carcinoma respectively) were obtained using combining SOM and RBF. The overall classification accuracy was 93.15%.
Skin cancer is a term given to the uncontrolled
growth of strange skin cells. It occurs whenever unrepaired
DNA damages to skin cells trigger mutations, or any other
genetic defects, that lead the skin cells to multiply readily
and form malignant tumors. Image processing is a
commonly used method for skin cancer detection from the
appearance of the affected area on the skin. The input to the
system is that the skin lesion image so by applying novel
image process techniques, it analyses it to conclude about
the presence of skin cancer. The Lesion Image analysis tools
checks for the various Melanoma parameters Like
Asymmetry, Border, Colour, Diameter, (ABCD rule), etc. by
texture, size and form analysis for image segmentation and
have stages. The extracted feature parameters are
accustomed classify the image as traditional skin and
malignant melanoma cancerlesion.
Artificial Neural Network (ANN) is one of the
important branches of Artificial Intelligence, which has
been accepted as a brand-new technology in computer
science for image processing. Neural Networks is currently
the area of interest in medicine, particularly in the fields of
radiology, urology, cardiology, oncology, etc. Neural
Network plays a vital role in an exceedingly call network. It
has been used to analyze Melanoma parameters Like
Asymmetry, Border, Colour, Diameter, etc. which are
calculated using MATLAB from skin cancer images
intending to developing diagnostic algorithms that might
improve triage practices in the emergency department.
Using the ABCD rules for melanoma skin cancer, we use
ANN in the classification stage. Initially, we train the
network with known target values. The network is well
trained with 96.9% accuracy, and then the unknown values
are tested for the cancer classification. This classification
method proves to be more efficient for skin cancer
classification
Skin Cancer Detection using Digital Image Processing and Implementation using...ijtsrd
Melanoma is a serious type of skin cancer. It starts in skin cells called melanocytes. There are 3 main types of skin cancer, Melanoma, Basal and Squamous cell carcinoma. Melanoma is more likely to spread to other parts of the body. Early detection of malignant melanoma in dermoscopy images is very important and critical, since its detection in the early stage can be helpful to cure it. Computer Aided Diagnosis systems can be very helpful to facilitate the early detection of cancers for dermatologists. Image processing is a commonly used method for skin cancer detection from the appearance of affected area on the skin. In this work, a computerised method has been developed to make use of Neural Networks in the field of medical image processing. The ultimate aim of this paper is to implement cost-effective emergency support systems to process the medical images. It is more advantageous to patients. The dermoscopy image of suspect area of skin cancer is taken and it goes under various pre-processing technique for noise removal and image enhancement. Then the image is undergone to segmentation using Thresholding method. Some features of image have to be extracted using ABCD rules. In this work, Asymmetry index and Geometric features are extracted from the segmented image. These features are given as the input to classifier. Artificial Neural Network ANN with feed forward architecture is used for classification purpose. It classifies the given image into cancerous or non-cancerous. The proposed algorithm has been tested on the ISIC International Skin Imaging Collaboration 2017 training and test datasets. The ground truth data of each image is available as well, so performance of this work can evaluate quantitatively. Khaing Thazin Oo | Dr. Moe Mon Myint | Dr. Khin Thuzar Win "Skin Cancer Detection using Digital Image Processing and Implementation using ANN and ABCD Features" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-6 , October 2018, URL: http://www.ijtsrd.com/papers/ijtsrd18751.pdf
SkinCure: An Innovative Smart Phone Based Application to Assist in Melanoma E...sipij
Melanoma spreads through metastasis, and therefore it has been proven to be very fatal. Statistical
evidence has revealed that the majority of deaths resulting from skin cancer are as a result of melanoma.
Further investigations have shown that the survival rates in patients depend on the stage of the infection;
early detection and intervention of melanoma implicates higher chances of cure. Clinical diagnosis and
prognosis of melanoma is challenging since the processes are prone to misdiagnosis and inaccuracies due
to doctors’ subjectivity. This paper proposes an innovative and fully functional smart-phone based
application to assist in melanoma early detection and prevention. The application has two major
components; the first component is a real-time alert to help users prevent skin burn caused by sunlight; a
novel equation to compute the time for skin to burn is thereby introduced. The second component is an
automated image analysis module which contains image acquisition, hair detection and exclusion, lesion
segmentation, feature extraction, and classification. The proposed system exploits PH2 Dermoscopy image
database from Pedro Hispano Hospital for development and testing purposes. The image database
contains a total of 200 dermoscopy images of lesions, including normal, atypical, and melanoma cases.
The experimental results show that the proposed system is efficient, achieving classification of the normal,
atypical and melanoma images with accuracy of 96.3%, 95.7% and 97.5%, respectively.
Melanoma Skin Cancer Detection using Image Processing and Machine Learningijtsrd
Dermatological Diseases are one of the biggest medical issues in 21st century due to its highly complex and expensive diagnosis with difficulties and subjectivity of human interpretation. In cases of fatal diseases like Melanoma diagnosis in early stages play a vital role in determining the probability of getting cured. We believe that the application of automated methods will help in early diagnosis especially with the set of images with variety of diagnosis. Hence, in this article we present a completely automated system of dermatological disease recognition through lesion images, a machine intervention in contrast to conventional medical personnel based detection. Our model is designed into three phases compromising of data collection and augmentation, designing model and finally prediction. We have used multiple AI algorithms like Convolutional Neural Network and Support Vector Machine and amalgamated it with image processing tools to form a better structure, leading to higher accuracy of 85 . Vijayalakshmi M M ""Melanoma Skin Cancer Detection using Image Processing and Machine Learning"" 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/ijtsrd23936.pdf
Paper URL: https://www.ijtsrd.com/engineering/other/23936/melanoma-skin-cancer-detection-using-image-processing-and-machine-learning/vijayalakshmi-m-m
Computer Vision for Skin Cancer Diagnosis and Recognition using RBF and SOMCSCJournals
Human skin is the largest organ in our body which provides protection against heat, light, infections and injury. It also stores water, fat, and vitamin. Cancer is the leading cause of death in economically developed countries and the second leading cause of death in developing countries. Skin cancer is the most commonly diagnosed type of cancer among men and women. Exposure to UV rays, modernize diets, smoking, alcohol and nicotine are the main cause. Cancer is increasingly recognized as a critical public health problem in Ethiopia. There are three type of skin cancer and they are recognized based on their own properties. In view of this, a digital image processing technique is proposed to recognize and predict the different types of skin cancers using digital image processing techniques. Sample skin cancer image were taken from American cancer society research center and DERMOFIT which are popular and widely focuses on skin cancer research. The classification system was supervised corresponding to the predefined classes of the type of skin cancer. Combining Self organizing map (SOM) and radial basis function (RBF) for recognition and diagnosis of skin cancer is by far better than KNN, Naïve Bayes and ANN classifier. It was also showed that the discrimination power of morphology and color features was better than texture features but when morphology, texture and color features were used together the classification accuracy was increased. The best classification accuracy (88%, 96.15% and 95.45% for Basal cell carcinoma, Melanoma and Squamous cell carcinoma respectively) were obtained using combining SOM and RBF. The overall classification accuracy was 93.15%.
Skin cancer is a term given to the uncontrolled
growth of strange skin cells. It occurs whenever unrepaired
DNA damages to skin cells trigger mutations, or any other
genetic defects, that lead the skin cells to multiply readily
and form malignant tumors. Image processing is a
commonly used method for skin cancer detection from the
appearance of the affected area on the skin. The input to the
system is that the skin lesion image so by applying novel
image process techniques, it analyses it to conclude about
the presence of skin cancer. The Lesion Image analysis tools
checks for the various Melanoma parameters Like
Asymmetry, Border, Colour, Diameter, (ABCD rule), etc. by
texture, size and form analysis for image segmentation and
have stages. The extracted feature parameters are
accustomed classify the image as traditional skin and
malignant melanoma cancerlesion.
Artificial Neural Network (ANN) is one of the
important branches of Artificial Intelligence, which has
been accepted as a brand-new technology in computer
science for image processing. Neural Networks is currently
the area of interest in medicine, particularly in the fields of
radiology, urology, cardiology, oncology, etc. Neural
Network plays a vital role in an exceedingly call network. It
has been used to analyze Melanoma parameters Like
Asymmetry, Border, Colour, Diameter, etc. which are
calculated using MATLAB from skin cancer images
intending to developing diagnostic algorithms that might
improve triage practices in the emergency department.
Using the ABCD rules for melanoma skin cancer, we use
ANN in the classification stage. Initially, we train the
network with known target values. The network is well
trained with 96.9% accuracy, and then the unknown values
are tested for the cancer classification. This classification
method proves to be more efficient for skin cancer
classification
Segmentation and Classification of Skin Lesions Based on Texture FeaturesIJERA Editor
Skin cancer is the most common type of cancer and represents 50% all new cancers detected each year. The deadliest form of skin cancer is melanoma and its incidence has been rising at a rate of 3% per year. Due to the costs for dermatologists to monitor every patient, there is a need for an computerized system to evaluate a patient‘s risk of melanoma using images of their skin lesions captured using a standard digital camera. In Proposed method, a novel texture-based skin lesion segmentation algorithm is used and to classify the stages of skin cancer using probabilistic neural network. Probabilistic neural network will give better performance in this system to detect a lot of stages in skin lesion. To extract the characteristics from various skin lesions and its united features gives better classification with new approached probabilistic neural network. There are five different skin lesions commonly grouped as Actinic Keratosis (AK), Basal Cell Carcinoma (BCC), Melanocytic Nevus / Mole (ML), Squamous Cell Carcinoma (SCC), Seborrhoeic Keratosis (SK). The system will be used to classify the queried images automatically to decide the stages of abnormality. The lesion diagnosis system involves two stages of process such as training and classification. Feature selection is used in the classified framework that chooses the most relevant feature subsets at each node of the hierarchy. An automatic classifier will be used for classification based on learning with some training samples of each stage. The accuracy of the proposed neural scheme is higher in discriminating cancer and pre-malignant lesions from benign skin lesions, and it attains an total classification accuracy is high of skin lesions.
Comparing the performance of linear regression versus deep learning on detect...journalBEEI
Melanoma is a type of deadly skin cancer. The survival rate of the patients can fall as low as 15.7% if the cancer cell has reached its final stage. Delayed treatment of melanoma can be attributed to its likeness to that of common nevus (moles). Two machine learning models were developed, each with a different approach and algorithm, to detect the presence of melanoma. Image classification is using the regression algorithm, and object detection is using deep learning. The two models are then compared, and the best model is determined according to the achieved metrics. The testing was conducted using 120 testing data and is made up of 60 positive data and 60 negative data. The testing result shows that object detection achieved 70% accuracy than image classification’s 68%. More importantly, linear regression’s 43% false-negative rate is noticeably high compared to convolutional neural network’s (CNN) 25%. A false-negative rate of 43% means almost half of sick patients tested using image classification will be diagnosed as healthy. This is dangerous as it can lead to delayed treatment and, ultimately, death. Thus it can be concluded that CNN is the best method in detecting the presence of melanoma.
Breast Cancer Detection from Mammography Images Using Machine Learning Algorithms (U-Net Segmentation and Dense Net Classifier implementation are in progress)
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.
Skin Lesion Classification using Supervised Algorithm in Data Miningijtsrd
Skin cancer is one of the major types of cancers with an increasing incidence over the past decades. Accurately diagnosing skin lesions to discriminate between benign and skin lesions is crucial.J48 Algorithm and SVM SUPPORT VECTOR MACHINE based techniques to estimate effort. In this work proposed system of the project is using data mining techniques for collecting the datasets for skin cancer. So that system can overcome to diagnosing the disease quickly and accuracy. Comparing to other algorithm proposed algorithm has more accuracy. When we have to using two kind of algorithm .They are J48, SVM. J48 Algorithm produced better accuracy more than SVM algorithm. The accuracy of the proposed system is 90.2381 . It means this prediction is very close to the actual values. G. Saranya | Dr. S. M. Uma "Skin Lesion Classification using Supervised Algorithm in Data Mining" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-6 , October 2019, URL: https://www.ijtsrd.com/papers/ijtsrd29346.pdf Paper URL: https://www.ijtsrd.com/computer-science/data-miining/29346/skin-lesion-classification-using-supervised-algorithm-in-data-mining/g-saranya
A Review of Super Resolution and Tumor Detection Techniques in Medical Imagingijtsrd
Images with high resolution are desirable in many applications such as medical imaging, video surveillance, astronomy etc. In medical imaging, images are obtained for medical investigative purposes and for providing information about the anatomy, the physiologic and metabolic activities of the volume below the skin. Medical imaging is an important diagnosis instrument to determine the presence of certain diseases. Therefore increasing the image resolution should significantly improve the diagnosis ability for corrective treatment. Brain tumor detection is used for identifying the tumor present in the Brain. MRI images help the doctors for identifying the Brain tumor size and shape of the tumor. The purpose of this report to provide a survey of research related super resolution and tumor detection methods. Fathimath Safana C. K | Sherin Mary Kuriakose ""A Review of Super Resolution and Tumor Detection Techniques in Medical Imaging"" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-3 , April 2019, URL: https://www.ijtsrd.com/papers/ijtsrd23525.pdf
Paper URL: https://www.ijtsrd.com/engineering/electronics-and-communication-engineering/23525/a-review-of-super-resolution-and-tumor-detection-techniques-in-medical-imaging/fathimath-safana-c-k
A deep convolutional structure-based approach for accurate recognition of ski...IJECEIAES
One-third of all cancer diagnoses worldwide are skin malignancies. One of the most common tumors, skin cancer can develop from a variety of dermatological conditions and is subdivided into different categories based on its textile, color, body, and other morphological characteristics. The most effective strategy to lower the mortality rate of melanoma is early identification because skin cancer incidence has been on the rise recently. In order to categorize dermoscopy images into the four diagnosis classifications of melanoma, benign, malignant, and human against machine (HAM) not melanoma, this research suggests a computer-aided diagnosis (CAD) system. Experimental results show that the suggested approach enabled 97.25% classification accuracy. In order to automate the identification of skin cancer and expedite the diagnosis process in order to save a life, the proposed technique offers a less complex and cutting-edge framework.
Melanoma is a particularly dangerous type of skin cancer and is hard to treat in its later stages. Therefore, early detection is key in reducing mortality rates. In order to assist dermatologists in doing this, computer-aided systems have been designed for desktop computers. However, there is a desire for the development of mobile, at-home diagnostics for melanoma risk assessment. Here, we introduce a smartphone application that captures images and extracts ABCD features to classify skin lesions as either malignant or benign. The algorithms used are adaptive to make the process light and user-friendly, as well as reliable in diagnosis. Images can be taken with the phone's camera or imported from public datasets. The entire process of taking the image, performing preprocessing, segmentation and classification is completed on an Android smartphone in a short time. Our application is evaluated on a dataset of 200 images, and achieved either comparable or better performance metrics than other methods. Additionally, it is easy-to-download and easy-to-navigate for the user, which is important for the widespread use of such diagnostics.
Kalwa, U.; Legner, C.; Kong, T.; Pandey, S. Skin Cancer Diagnostics with an All-Inclusive Smartphone Application. Symmetry 2019, 11, 790. https://doi.org/10.3390/sym11060790
https://www.mdpi.com/2073-8994/11/6/790
Segmentation and Classification of Skin Lesions Based on Texture FeaturesIJERA Editor
Skin cancer is the most common type of cancer and represents 50% all new cancers detected each year. The deadliest form of skin cancer is melanoma and its incidence has been rising at a rate of 3% per year. Due to the costs for dermatologists to monitor every patient, there is a need for an computerized system to evaluate a patient‘s risk of melanoma using images of their skin lesions captured using a standard digital camera. In Proposed method, a novel texture-based skin lesion segmentation algorithm is used and to classify the stages of skin cancer using probabilistic neural network. Probabilistic neural network will give better performance in this system to detect a lot of stages in skin lesion. To extract the characteristics from various skin lesions and its united features gives better classification with new approached probabilistic neural network. There are five different skin lesions commonly grouped as Actinic Keratosis (AK), Basal Cell Carcinoma (BCC), Melanocytic Nevus / Mole (ML), Squamous Cell Carcinoma (SCC), Seborrhoeic Keratosis (SK). The system will be used to classify the queried images automatically to decide the stages of abnormality. The lesion diagnosis system involves two stages of process such as training and classification. Feature selection is used in the classified framework that chooses the most relevant feature subsets at each node of the hierarchy. An automatic classifier will be used for classification based on learning with some training samples of each stage. The accuracy of the proposed neural scheme is higher in discriminating cancer and pre-malignant lesions from benign skin lesions, and it attains an total classification accuracy is high of skin lesions.
Comparing the performance of linear regression versus deep learning on detect...journalBEEI
Melanoma is a type of deadly skin cancer. The survival rate of the patients can fall as low as 15.7% if the cancer cell has reached its final stage. Delayed treatment of melanoma can be attributed to its likeness to that of common nevus (moles). Two machine learning models were developed, each with a different approach and algorithm, to detect the presence of melanoma. Image classification is using the regression algorithm, and object detection is using deep learning. The two models are then compared, and the best model is determined according to the achieved metrics. The testing was conducted using 120 testing data and is made up of 60 positive data and 60 negative data. The testing result shows that object detection achieved 70% accuracy than image classification’s 68%. More importantly, linear regression’s 43% false-negative rate is noticeably high compared to convolutional neural network’s (CNN) 25%. A false-negative rate of 43% means almost half of sick patients tested using image classification will be diagnosed as healthy. This is dangerous as it can lead to delayed treatment and, ultimately, death. Thus it can be concluded that CNN is the best method in detecting the presence of melanoma.
Breast Cancer Detection from Mammography Images Using Machine Learning Algorithms (U-Net Segmentation and Dense Net Classifier implementation are in progress)
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.
Skin Lesion Classification using Supervised Algorithm in Data Miningijtsrd
Skin cancer is one of the major types of cancers with an increasing incidence over the past decades. Accurately diagnosing skin lesions to discriminate between benign and skin lesions is crucial.J48 Algorithm and SVM SUPPORT VECTOR MACHINE based techniques to estimate effort. In this work proposed system of the project is using data mining techniques for collecting the datasets for skin cancer. So that system can overcome to diagnosing the disease quickly and accuracy. Comparing to other algorithm proposed algorithm has more accuracy. When we have to using two kind of algorithm .They are J48, SVM. J48 Algorithm produced better accuracy more than SVM algorithm. The accuracy of the proposed system is 90.2381 . It means this prediction is very close to the actual values. G. Saranya | Dr. S. M. Uma "Skin Lesion Classification using Supervised Algorithm in Data Mining" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-6 , October 2019, URL: https://www.ijtsrd.com/papers/ijtsrd29346.pdf Paper URL: https://www.ijtsrd.com/computer-science/data-miining/29346/skin-lesion-classification-using-supervised-algorithm-in-data-mining/g-saranya
A Review of Super Resolution and Tumor Detection Techniques in Medical Imagingijtsrd
Images with high resolution are desirable in many applications such as medical imaging, video surveillance, astronomy etc. In medical imaging, images are obtained for medical investigative purposes and for providing information about the anatomy, the physiologic and metabolic activities of the volume below the skin. Medical imaging is an important diagnosis instrument to determine the presence of certain diseases. Therefore increasing the image resolution should significantly improve the diagnosis ability for corrective treatment. Brain tumor detection is used for identifying the tumor present in the Brain. MRI images help the doctors for identifying the Brain tumor size and shape of the tumor. The purpose of this report to provide a survey of research related super resolution and tumor detection methods. Fathimath Safana C. K | Sherin Mary Kuriakose ""A Review of Super Resolution and Tumor Detection Techniques in Medical Imaging"" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-3 , April 2019, URL: https://www.ijtsrd.com/papers/ijtsrd23525.pdf
Paper URL: https://www.ijtsrd.com/engineering/electronics-and-communication-engineering/23525/a-review-of-super-resolution-and-tumor-detection-techniques-in-medical-imaging/fathimath-safana-c-k
A deep convolutional structure-based approach for accurate recognition of ski...IJECEIAES
One-third of all cancer diagnoses worldwide are skin malignancies. One of the most common tumors, skin cancer can develop from a variety of dermatological conditions and is subdivided into different categories based on its textile, color, body, and other morphological characteristics. The most effective strategy to lower the mortality rate of melanoma is early identification because skin cancer incidence has been on the rise recently. In order to categorize dermoscopy images into the four diagnosis classifications of melanoma, benign, malignant, and human against machine (HAM) not melanoma, this research suggests a computer-aided diagnosis (CAD) system. Experimental results show that the suggested approach enabled 97.25% classification accuracy. In order to automate the identification of skin cancer and expedite the diagnosis process in order to save a life, the proposed technique offers a less complex and cutting-edge framework.
Melanoma is a particularly dangerous type of skin cancer and is hard to treat in its later stages. Therefore, early detection is key in reducing mortality rates. In order to assist dermatologists in doing this, computer-aided systems have been designed for desktop computers. However, there is a desire for the development of mobile, at-home diagnostics for melanoma risk assessment. Here, we introduce a smartphone application that captures images and extracts ABCD features to classify skin lesions as either malignant or benign. The algorithms used are adaptive to make the process light and user-friendly, as well as reliable in diagnosis. Images can be taken with the phone's camera or imported from public datasets. The entire process of taking the image, performing preprocessing, segmentation and classification is completed on an Android smartphone in a short time. Our application is evaluated on a dataset of 200 images, and achieved either comparable or better performance metrics than other methods. Additionally, it is easy-to-download and easy-to-navigate for the user, which is important for the widespread use of such diagnostics.
Kalwa, U.; Legner, C.; Kong, T.; Pandey, S. Skin Cancer Diagnostics with an All-Inclusive Smartphone Application. Symmetry 2019, 11, 790. https://doi.org/10.3390/sym11060790
https://www.mdpi.com/2073-8994/11/6/790
Among the different types of skin cancer, melanoma is considered to be the deadliest and is difficult to treat at advanced stages. Detection of melanoma at earlier stages can lead to reduced mortality rates. Desktop-based computer-aided systems have been developed to assist dermatologists with early diagnosis. However, there is significant interest in developing portable, at-home melanoma diagnostic systems which can assess the risk of cancerous skin lesions. Here, we present a smartphone application that combines image capture capabilities with preprocessing and segmentation to extract the Asymmetry, Border irregularity, Color variegation, and Diameter (ABCD) features of a skin lesion. Using the feature sets, classification of malignancy is achieved through support vector machine classifiers. By using adaptive algorithms in the individual data-processing stages, our approach is made computationally light, user friendly, and reliable in discriminating melanoma cases from benign ones. Images of skin lesions are either captured with the smartphone camera or imported from public datasets. The entire process from image capture to classification runs on an Android smartphone equipped with a detachable 10x lens, and processes an image in less than a second. The overall performance metrics are evaluated on a public database of 200 images with Synthetic Minority Over-sampling Technique (SMOTE) (80% sensitivity, 90% specificity, 88% accuracy, and 0.85 area under curve (AUC)) and without SMOTE (55% sensitivity, 95% specificity, 90% accuracy, and 0.75 AUC). The evaluated performance metrics and computation times are comparable or better than previous methods. This all-inclusive smartphone application is designed to be easy-to-download and easy-to-navigate for the end user, which is imperative for the eventual democratization of such medical diagnostic systems.
Hybrid channel and spatial attention-UNet for skin lesion segmentationIAESIJAI
Melanoma is a type of skin cancer which has affected many lives globally. The American Cancer Society research has suggested that it a serious type of skin cancer and lead to mortality but it is almost 100% curable if it is detected and treated in its early stages. Currently automated computer vision-based schemes are widely adopted but these systems suffer from poor segmentation accuracy. To overcome these issue, deep learning (DL) has become the promising solution which performs extensive training for pattern learning and provide better classification accuracy. However, skin lesion segmentation is affected due to skin hair, unclear boundaries, pigmentation, and mole. To overcome this issue, we adopt UNet based deep learning scheme and incorporated attention mechanism which considers low level statistics and high-level statistics combined with feedback and skip connection module. This helps to obtain the robust features without neglecting the channel information. Further, we use channel attention, spatial attention modulation to achieve the final segmentation. The proposed DL based scheme is instigated on publically available dataset and experimental investigation shows that the proposed Hybrid Attention UNet approach achieves average performance as 0.9715, 0.9962, 0.9710.
Brain Tumor Segmentation and Volume Estimation from T1-Contrasted and T2 MRIsCSCJournals
Amid the variations of the cancer disease, brain tumors account for the majority deaths among young people. To diagnose and treat this deadly disease effectively, analysis of hundreds of medical images such as Magnetic Resonance Imaging (MRI) scans is usually performed. However, the analyses of these scans are still mainly performed manually, making the procedure not only very tedious and time-consuming for doctors, but also error prone and non-repeatable. Attempts have been made to automate this procedure by performing image processing techniques such as thresholding, region-growing, unsupervised learning (e.g. k-means, fuzzy c-means clustering), and supervised learning (e.g. support vector machines). Some require human interaction. The techniques may be applied on one or more MRI sequence scans. Unfortunately, these automated attempts still result in a high level of error, and more computationally complex algorithms do not guarantee an increase in accuracy. This paper presents a novel, fully automatic brain tumor segmentation and volume estimation method using simple techniques on T1-contrasted and T2 MRIs. This new approach implemented five main steps: preprocessing using anisotropic diffusion, segmentation of tumor regions using k-means clustering, region combination using logical and Morphological operations, error checking using temporal smoothing, and volumetric measurement. When compared with five state-of-the-art algorithms, the proposed algorithm outperformed those in past works. Advances were seen by its noise reduction, increase in accuracy and closeness to actual tumor volume.
In recent days, skin cancer is seen as one of the most Hazardous form of the Cancers found in
Humans. Skin cancer is found in various types such as Melanoma, Basal and Squamous cell Carcinoma among
which Melanoma is the most unpredictable. The detection of Melanoma cancer in early stage can be helpful to
cure it. Computer vision can play important role in Medical Image Diagnosis and it has been proved by many
existing systems. In this paper, we present a survey on different steps which are being to detect the Melanoma
Skin Cancer using Image Processing tools. In every step, what are the different methods are be included in our
paper.
Computer Aided System for Detection and Classification of Breast CancerIJITCA Journal
Breast cancer is one of the most important causes of death among all type of cancers for grown-up and
older women, mainly in developed countries, and its rate is rising. Since the cause of this disease is not yet
known, early detection is the best way to decrease the breast cancer mortality. At present, early detection of
breast cancer is attained by means of mammography. An intelligent computer-aided diagnosis system can
be very helpful for radiologist in detecting and diagnosing cancerous cell patterns earlier and faster than
typical screening programs. This paper proposes a computer aided system for automatic detection and
classification of breast cancer in mammogram images. Intuitionistic Fuzzy C-Means clustering technique
has been used to identify the suspicious region or the Region of Interest automatically. Then, the feature
data base is designed using histogram features, Gray Level Concurrence wavelet features and wavelet
energy features. Finally, the feature database is submitted to self-adaptive resource allocation network
classifier for classification of mammogram image as normal, benign or malignant. The proposed system is
verified with 322 mammograms from the Mammographic Image Analysis Society Database. The results
show that the proposed system produces better results.
The current big challenge facing radiologists in healthcare is the automatic detection and classification of masses in breast mammogram images. In the last few years, many researchers have proposed various solutions to this problem. These solutions are effectively dependent and work on annotated breast image data. But these solutions fail when applied to unlabeled and non-annotated breast image data. Therefore, this paper provides the solution to this problem with the help of a neural network that considers any kind of unlabeled data for its procedure. In this solution, the algorithm automatically extracts tumors in images using a segmentation approach, and after that, the features of the tumor are extracted for further processing. This approach used a double thresholding-based segmentation technique to obtain a perfect location of the tumor region, which was not possible in existing techniques in the literature. The experimental results also show that the proposed algorithm provides better accuracy compared to the accuracy of existing algorithms in the literature.
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RECOGNITION OF SKIN CANCER IN DERMOSCOPIC IMAGES USING KNN CLASSIFIER
1. Advances in Engineering: an International Journal (ADEIJ), Vol.2, No.3
15
RECOGNITION OF SKIN CANCER IN DERMOSCOPIC
IMAGES USING KNN CLASSIFIER
K. Ramya Thamizharasi1, J.Ganesh2
1Final M.Tech, Department Of Information Technology, Dr.Sivanthi Aditanar College of
Engineering, Tiruchendur, India
2Assistant Professor, Department Of Information Technology, Dr.Sivanthi Aditanar
College of Engineering, Tiruchendur, India
ABSTRACT
The largest organ of the body is human skin. Melanoma is a fastest growing & deadliest cancer which
starts in pigment cells (melanocytes) of the skin that mostly occurs on the exposed parts of the body. Early
detection is vital in treating this type of skin cancer but the time and effort required is immense.
Dermoscopy is a non invasive skin imaging technique of acquiring a magnified and illuminated image of a
region of skin for increased clarity of the spots on the skin The use of machine learning and automation of
the process involved in detection will not only save time but will also provide a more accurate diagnosis.
The skin images collected from the databases cannot be directly classified by the automation techniques.
The reason is twofold: (a) Lack of clarity in the features which is mainly due to the poor contrast of the raw
image and (b) Large dimensions of the input image which causes the complexity of the system. Hence,
suitable techniques must be adopted prior to the image classification process to overcome these drawbacks.
The first drawback can be minimized by adopting suitable pre- processing techniques which can enhance
the contrast of the input images. The second drawback is solved by incorporating the feature extraction
technique which reduces the dimensions of the input image to high extent. Further, K-NN (K-Nearest
Neighbor) classifier is used for classification of the given image into cancerous or non- cancerous.
KEYWORDS
Dermoscopy , Melanocyte , Histogram
1. INTRODUCTION
The skin is the important organ that covers the whole human body. Many people do not think of
the skin as like other organs, it has a discrete structure and many important
functions. Skin has mesodermal cells, pigmentation, such as melanin provided by melanocytes,
which absorb some of the potentially dangerous ultraviolet radiation (UV) in sunlight. It also
contains DNA repair enzymes that help reverse UV damage, such that people lacking the genes
for these enzymes suffer high rates of skin cancer. One form predominantly produced by UV light
is malignant melanoma, is particularly invasive, causing it to spread quickly, and can often be
deadly. Skin cancer is the common of all human cancers. Some form of skin cancer is diagnosed
in more than 3 million people in the United States each year. Cancer occurs when normal cells
undergo a transformation during which they grow abnormally and multiply without normal
controls. As the cells multiply, they form a mass called a tumor. Tumors of the skin are referred to
as skin lesions. This means that they encroach on and invade the neighboring tissues because of
2. Advances in Engineering: an International Journal (ADEIJ), Vol.2, No.3
16
their uncontrolled growth. Tumors may also travel to remote organs via the bloodstream or
lymphatic system. Melanoma is a cancer of pigment producing-cells called melanocytes. Most
melanomas originate from the skin, though they can also arise from other parts of the body
containing melanocytes, including the eyes, brain or spinal cord, or mucous membranes. The
ability to spread widely to other parts of the body is a unique characteristic of melanoma that the
other more common skin cancers, basal cell carcinoma and squamous cell carcinoma, rarely
possess. This characteristic makes melanoma the deadliest of all skin cancers. Detection of
malignant melanoma in its early stages considerably reduces morbidity and mortality. Skin cancer
can be cured at very high rates with simple and economical treatments, if detected at its earlier
stages. Presently there is a greater need of automatic and cost effective emergency support system
for the diagnosis of skin cancer at an early stage. Recently, computer-aided diagnosis (CAD) has
become a part of the routine clinical work for detection of skin cancer at many screening sites and
hospitals in the United States. This seems to indicate that CAD is beginning to be applied widely
in the detection and differential diagnosis of many different types of abnormalities in medical
images obtained in various examinations by use of different imaging modalities. The future of
image processing and CAD in diagnostic is more promising now than ever, with increasingly
impressive results.
Figure 1: Structure of the skin with cancer cells
2. RELATED WORK
Related work introduce some research for automatic benign and malignant skin lesion detection
in the following.
Noel C. F. Codella , Chung-Ching Lin, Proposes an Automated dermoscopic image analysis that
has witnessed rapid growth in diagnostic performance. Yet adoption faces resistance, in part,
because no evidence is provided to support decisions. In this work, an approach for evidence-
based classification is presented. A feature embedding is learned with CNNs, triplet-loss, and
global average pooling, and used to classify via k-NN search. Evidence is provided as both the
discovered neighbors, as well as localized image regions most relevant to measuring distance
between query and neighbors. To ensure that results are relevant in terms of both label accuracy
and human visual similarity for any skill level, a novel hierarchical triplet logic is implemented to
jointly learn an embedding according to disease labels and non-expert similarity. Results are
3. Advances in Engineering: an International Journal (ADEIJ), Vol.2, No.3
17
improved over baselines trained on disease labels alone, as well as standard multiclass loss.
Quantitative relevance of results, according to non-expert similarity, as well as localized image
regions, are also significantly improved.
Margarida Silveira, Dermoscopic images are detected using an intelligent agent-based or robotic
system to conduct long-term automatic health monitoring and robust efficient disease diagnosis
as autonomous e-Careers in real-world applications [2]. In this research, the aim is to deal with
such challenges by evaluating six methods for the segmentation of skin lesions in dermoscopic
images. They includes some state of the art techniques which is being successfully used in many
medical imaging complications (gradient vector flow (GVF) and the level set method of Chan et
al. [(C-LS)]. They also provides a set of methods introduced by the authors which are combined
with this certain application (adaptive thresholding (AT), adaptive snake (AS), EM level set
[(EM-LS), and fuzzy-based splitand-merge ssss algorithm (FBSM)]. The segmentation methods
has been applied to 100 dermoscopic images and they are further evaluated with their respective
four different metrics, with the particular segmentation result they provides an experienced
dermatologist as the ground truth. The best results were obtained by the AS and EM-LS methods,
which are semi-supervised methods. The fully automatic method is FBSM, where the results is
slightly poor than AS and EM-LS.
Omar Abuzaghleh, a real time image analysis system [3] to aid in the malignant melanoma
prevention and early detection is highly in-demand. In this paper, they proposed a real time
image analysis system to recover the malignant melanoma prevention and their early detection.
They present an image recognition technique, where the user will be able to capture skin images
of different mole types and the system will analyze and process the images and inform the user at
real-time to have a medical help urgently. This work introduces convenient steps for automating
the process of melanoma prevention and detection. Experimental results on a PH2 dermoscopy
research database images confirms the efficiency of the system.
3. PROPOSED SYSTEM
Proposed System, It is an intelligent decision support system for benign and malignant skin
lesions classification. The system includes the following key stages, i.e. pre-processing, skin
lesion segmentation, feature extraction and classification. Figure 2 shows system architecture,
which shows the principal processes of the proposed system. The test image is preprocessed
which includes hair removal, enhancement and morphological operation. We can remove noise,
sharpen the details of the infected region and adjust the contrast of an image, making it easier to
identify key features using Morphological operations. In Segmentation, Adaptive Thresh-holding
is used. In Feature Extraction, different algorithms were used, they are Mean (Fast Fourier
Transmission), Standard Deviation(FFT), Histogram based Mean & Standard Deviation, Edge
based pixel count of area & hole and Edge based logarithmic pixel count of area & hole. This is
an important distinguishing feature characteristic for diseases. For the classification K-NN (K-
Nearest Neighbor) is used. The K-NN classifier are applied on the statistical texture features to
predict the malignancy of the skin lesion. Each skin image in test set is classified by comparing it
against the skin images in the training set. The training set consists of both normal and cancer
skin images and skin disease images. The comparison is performed using the local features
obtained in the previous step. K-NN have several advantages over the more classical classifiers
such as decision trees and neural networks. The following section describes the modules involved
in the proposed work.
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Figure 2: System Architecture for the proposed work
4. METHODOLOGY
The following steps are implemented for classification of skin cancer
Image Acquisition
Pre-processing
Segmentation
Feature Extraction
Classification
4.1. Image Acquisition
Input to proposed system is dermoscopic images, dermoscopic images are images taken by
dermatoscope. It is a hand held instrument used to take pictures of skin lesions (body part) and
make it very easier to diagnose skin disease. These images were obtained from online skin
diseases gallery namely ISIC 2018 database, Dermquest.com and skinvision.com
4.2. Pre-Processing
Preprocessing of the skin image is the first step in authors proposed technique. Usually skin
images have pathological noise and various texture backgrounds, which may cause difficulties in
extraction. Preprocessing of an image is done which involves two steps, they are
1. Hair removal
2. Image enhancement
The purpose of these steps is basically to improve and enhance the image and the image quality to
get more surety and ease in segmenting the skin lesion. Hence Morphological “closing” operation
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is performed to pursues the goals of filtering out the form and structure of the image.
4.2.1. Morphological Operation
Morphology is a broad set of image processing operations that process skin images based on
shapes and making it easier to remove noise, hair and adjust the contrast of an image. The most
basic morphological operations are Dilation & Erosion were used.
Dilation - It allows skin lesions to expand, thus potentially filling in small holes and
connecting disjoint objects.
Erosion - It shrinks the skin lesion by etching away (eroding) their boundaries. The holes
and gaps between different regions become larger, and small details are eliminated
An essential part of the dilation and erosion operations is the structuring element used to probe or
interact the given image. A structuring element is a shape which is represented by a matrix
consisting of only 0's and 1's that can have any arbitrary shape and size. The pixels with values of
1 define the neighborhood. Structuring elements are typically much smaller than the image being
processed. The center pixel of the structuring element, called the origin, identifies the pixel of
interest i.e., the pixel being processed. These pixels are considered in dilation and erosion
processing.
In the proposed work, A disk shaped structuring element was used as this shape reflects
biological structures more accurately than sharp angles or linear shapes. Disks are a natural
choice for a structuring element, since they are isotropic (same in all directions), disk radius
value is assigned as r=6. The first operation is Closing it is a dilation followed by an erosion.
Closing smoothes the contour by enforcing bridges and closing small holes. Since dilation occurs,
small holes are removed as the inner lining of the shapes fill inward. The restoring erosion will
skip the closed holes, thus making this operation good for closing up holes. Thus morphological
filtering helps as to smooth and simplify the objects edges without changing the size of objects
and enhance the particular melanoma region for accurate segmentation.
4.3. Segmentation
segmentation has become an important part of image processing. The main aim of segmentation is
simplification i.e. representing the skin image into meaningful and easily analyzable way. The
main objective behind the segmentation of the medical image is to separate the tumor from the
background. Using the thresholding method, segmentation of the skin lesion is done by fixing all
pixels whose intensity values are more than the threshold to a foreground value. The remaining
pixels are set to a background value. Such technique can be used to obtain binary images from
grayscale images. The conventional thresholding techniques use a global threshold for all pixels,
whereas adaptive thresholding changes the threshold value dynamically over the image. In this
phase, adaptive thresholding is used to extract the skin image.
4.3.1. Adaptive Thresholding
In this, the algorithm calculate the threshold for a small regions of the image. Obtaining different
thresholds for different regions of the same image and it gives us better results for images with
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varying illumination. Using local adaptive thresholding, each pixel in the image will have its own
threshold value to segment the tumor from the background. Adaptive thresholding typically takes
a grayscale or color image as input and, in the simplest implementation, outputs
a binary image representing the segmentation. For each pixel in the tumor image, a threshold has
been calculated using standard deviation. If the pixel value is below the threshold it is set to the
background value, otherwise it assumes the foreground value. As adaptive thresholding creates
separate threshold value for every segment in the image. The minimum threshold value is chosen
for segmentation.
A threshold T(x, y) is a value such that
Where b(x,y) is the binarized image and I(x,y)∈[0,1] be the intensity of a pixel at location (x,y) of
the image I. In local adaptive technique, a threshold is calculated for each pixel, based on some
local statistics such as range, variance, or surface-fitting parameters of the neighborhood pixels. It
can be approached with standard derivation of pixel values, and local image contrast.
4.4. Feature Extraction
Feature extraction is often a necessary step for segmentation to be successful. Lesions come in
different sizes and have different properties. To classify images into those that display benign
traits or melanoma, features need to be extracted to be fed into the classification stage. Here, the
skin mole is converted to intensity values by a vector of features and its dimension depends on
the number of extracted properties. This involves the computation of several statistical properties
to yield features. These features were then considered as a source data for the subsequent stages.
Features have been then extracted from the segmented dermoscopic lesions. Some mathematical
terms were used for finding the parameters like mean, s.d.
The selected features are elaborated below
4.4.1. Fast Fourier Transform
The FFT are applied to tumor images for the purpose of enhancing visibility or selection of
features or structures of interest for measurement (such as image compression, motion
characteristics measurement, data loss analysis, etc). In the realm of image processing the fourier
transform basically breaks down the image into the frequency domain. This makes it much easier
to process and concentrate purely on discrete components of an image and also could isolate out
the particular portion of the image easily. Creating a magnitude spectrum which specifies the
mean and standard deviation. Visualizing the fourier transform image using matlab is given
below
F(u,v) is a Fourier transform of f(x,y) and it has complex entries. F = fft2(f)
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In order to display the Fourier Spectrum |F(u,v)|
– Reduce dynamic range of |F(u,v)| by displaying the log: D =
log(1+|F(u,v)|)
4.4.2. Histogram Based Mean & Standard Deviation
The histogram provides information about the nature of the melanoma, or an object within the
skin image. The histogram calculation is a fully statistical approach, so we perform quantization.
Quantization is a process in which the histogram is divided into levels or bins. As grayscale
image consists of 256 levels. Computations for the feature extraction in these 256 levels will be
slow. To increase the speed of computations, the histogram of the skin image is reduced to 2 bins.
Then the mean and standard deviation of pixels in each bin is been calculated, because the mean
will give an idea about the brightness of the image and the standard deviation give an idea about
the contrast of the skin image
Mean: It is the measure of intensity. The value of the Mean shows the general brightness of the
image. Each bin consists of a range of some pixel values. These values in each bin can be used to
calculate the mean of bin which represents the brightness of the image in that bin. If mean of a bin
is high then it means that the image is bright in that bin and if mean is low then it means that the
image is dark in that bin. The mean is defined as:
Standard Deviation: It is the measure of contrast in an image. The standard deviation in each bin
is also calculated by using the mean and pixel values of each bin. The standard deviation reveals
something about the contrast of the skin image in particular bin. If standard deviation is high then
it shows the high contrast of melanoma in a particular bin. If standard deviation is low then it will
show the low contrast in melanoma of a particular level of histogram. The SD is defined as:
𝒙𝒋𝒊 is the pixel values in the bin
N is the total number of pixels in each bin.
4.4.3. Edge Based Features
Edge based features of the skin lesions are calculated. In which they includes four parameters
(pixel count of hole, pixel count of edge and taking logarithm for both hole & edge).In edge-based
description, edge (or contour) pixels could be expressed by their coordinates, sequence, or by
geometrical properties of the surrounded region (such as boundary length, curvature, and
signature).
4.4.4. Pixel count of hole & edge
Edge pixels are detected for each area to describe the location and the intensity level of the
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corner. Holes are bounded contiguous pixels (regions) and have a distinct intensity level. If a
region (e.g., a surface) has holes, it is called as multiple contiguous region. Holes could be
classified into circular (elliptical), polygonal, and irregular holes. The basic hole & edge feature
measurements are area. Moments define the object pixels distribution with M as the total area of
region (such as hole) is defined by:
M = ∑𝒊 ∑𝒋 𝑰 (𝒙𝒊, 𝒚𝒋), (i,j)𝝐𝑹
Where R is the region of interest and (i, j) represents the pixels of the region.
4.5. Classification
Selected features are used for the recognition and classification of skin lesions. A wide range of
classifiers is explored. Eventually, the K-NN classifier was used for skin lesion classification
because of its superior performances. KNN classifier is best suited for classifying skin images due
to its lesser execution time and better accuracy than other commonly used methods which include
Hidden Markov Model and Kernel method. KNN classifier has a faster execution time and is
dominant than SVM.
4.5.1. KNN Classifier
The simplest classification scheme is a nearest neighbor classification in the image space. Under
this scheme an image in the test set is recognized by assigning to it the label of the closest point in
the learning set, where distance are measured in image space. The Euclidean distance metric is
often chosen to determine the closeness between the data points in KNN. A distance is assigned
between all pixels in a dataset. Distance is defined as the Euclidean distance between two pixels.
This Euclidean distance is by default in a KNN classifier. After the feature extraction process, the
extracted features are directly applied to the classifiers, the machine learning tools, for
classification into two different classes. The process involves two phases namely training phase
and testing phase.
Training phase: The patterns in terms of features and class labels of benign or malignant
images are fed to the classifiers for training. The sample images of about 40
melanoma(type = 1) and 40 normal(type = 0) skin images are trained with their feature
attributes which has been extracted during feature extraction. And these datas were
plotted in the featurespace.
Testing phase: Unknown test pattern is fed and the knowledge gained during the training
phase will classify the unknown pattern and again plot them in the feature space. A
feature space is an abstract space where each sample image with their attributes is
represented as a point in n- dimensional space. Its dimension is determined by the
number of features used to describe the patterns. The total number of images in the
training database is 40.
4.5.2. Parameter Selection
The best choice of k depends upon the data; generally, larger values of k reduces effect of the
noise on the classification, but make boundaries between classes less distinct. A good k can
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be selected by various heuristic techniques. The special case where the class is predicted to be
the class of the closest training sample is called the nearest neighbor algorithm. The accuracy of
the k-NN algorithm can be severely degraded by the presence of noisy or irrelevant features, or if
the feature scales are not consistent with their importance. Much effort has been put into features
to improve classification. Here k value is taken as 2.
Figure 3: K- Nearest Neighbor feature space with k=2
In the fig3, it is shown that '−' negative symbols are melanoma(type=1) and '+' positive symbols
indicate normal skin image(type=0) which are trained with KNN and plotted in the feature space
with value k=2. Here '×' symbol indicates an unknown sample, which is been plotted in the
feature space and now compute the nearest distance as the value of k is set as 2. Use class labels
of nearest neighbors to determine the class label of unknown sample image. In the above fig,
symbol '×'(unknown sample) is nearest to '−' (melanoma type=1) which indicates the presence of
melanoma. Likewise, the sample images are classified and analysed as benign or melanoma skin
cancer.
Advantage: The KNN is an unbiased algorithm and have not any assumption of the data under
consideration. It is very popular because of its simplicity and ease of implementation plus
effectiveness. A main advantage of the KNN algorithm is that it performs well with multi-model
classes because the basis of its decision is based on a small neighborhood of similar objects.
Therefore, even if the target class is multi-modal, the algorithm can still lead to good accuracy.
5. EXPERIMENTAL RESULT
The proposed method detailed in (4) is applied on the 100 dermoscopic images. The database
contains 42 non-melanoma (benign) and 58 melanoma (malignant) images. The feature values are
extracted for the sample images and classification is performed using KNN classifier which
includes training and testing of the skin images. The performance analysis graph is shown below
k=2
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Figure4: Analysis graph
5.1. Performance Analysis
To analyze the performance metrics of the proposed architecture, The results of K-NN is
compared with SVM respectively. Some of the performance metrics are given below,
5.1.1. Accuracy: The accuracy of a test is its ability to differentiate the healthy and melanoma
skin images correctly. To estimate the accuracy, it is necessary to calculate the proportion of true
positive and true negative in all evaluated cases. Mathematically, this can be stated as:
5.1.2. Sensitivity: (also called the true positive)The sensitivity of a test is its ability to determine
the benign cases i.e., healthy correctly. To estimate it, the proportion of true positive in sample
images is been calculated. Mathematically, this can be stated as:
5.1.3. Specificity: The specificity of a test is its ability to determine the healthy cases correctly.
To estimate it, the proportion of true negative in healthy cases is been calculated. Mathematically,
this can be stated as:
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
KNN
SVM
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5.1.4. Precision: Precision (also called positive predictive value) is the fraction of relevant
instances among the retrieved instances.
5.1.5. Recall: It (also known as sensitivity) is the fraction of relevant instances that have been
retrieved over the total amount of relevant instances. Both precision and recall are based on an
understanding and measure of relevance.
5.1.6. F-measure: A measure that combines precision and recall and is the harmonic mean of
decision and recall. Here β parameter on F-measure has zero value.
5.1.7. G-mean: It is the geometric mean of sensitivity and precision.
True positive(TP) = correctly identified
False positive(FP) = incorrectly identified
True negative(TN) = correctly rejected
False negative(FN) = incorrectly rejected
Comparison metrics between SVM and K-NN
Comparison Metrics SVM K-NN
Accuracy 0.5698 0.9884
Sensitivity 0.9783 1
Specificity 0.1 0.975
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Precision 0.5556 0.9787
Recall 0.9783 1
F-measure 0.7087 0.9892
G-mean 0.3128 0.9874
Table 1: Comparison metrics of SVM & K-NN
Table 1 shows the performance metrics of the proposed method with recent works on
classification and recognition of melanoma. Authors proposed method shows the highest
performance in terms of accuracy, sensitivity, specificity, f- measures, g-means, precision and
recall when compared with support vector machine respectively.
6. CONCLUSION AND FUTURE WORK
The structural and textural features is explored for melanoma recognition. These features are
obtained from the different variants of operator like FFT(Fast Fourier Transform), Histogram
based bin separation. The obtained results are validated using KNN classifier. Melanoma is the
dangerous type of skin cancer having highest mortality rate. Whereas, the annihilation in their
early stage gives a high survival rate so that it demands early diagnosis. The accustomed
diagnosis methods are expensive and inefficient due to the involvement of experienced experts
with their requirements for the highly equipped environment. The recent advancements in the
proposed system for this diagnosis are highly promising with improved accuracy and efficiency.
The basic aim of this work is a simple, efficient and automatic skin cancer, detection and
diagnosis system with the use of commonly available software for non- experts/clinicians/doctors.
The accuracy of classification is measured and presented in the experimental results. The results
revealed that the classification accuracy is influenced by the size of training set. In future more
measures should be taken to evaluate the proposed methodology and improve it further to make it
robust and adapt it to specific applications. A fuzzy-neural expert system can be built as a further
study of the presented work to classify the Malignant Melanoma into superficial and on the basis
of clinical and morphological features. Emerging technologies such as in vivo reflectance
confocal microscopy are currently being investigated to determine their utility for noninvasive
diagnosis of melanoma. This review summarizes the currently available cutaneous imaging
devices and new frontiers in noninvasive diagnosis of skin disease. Also author anticipate that
multimodal systems which combine different imaging technologies will further improve the
ability to detect melanoma at an earlier stage.
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