引用本文:GAO Wei-wei,SHEN Jian-xin,WANG Ming-hong,ZUO Jing.[en_title][J].Journal of Chongqing University (English Edition),2018,17(3):77~86
GAO Wei-wei,SHEN Jian-xin,WANG Ming-hong,ZUO Jing.A novel method for detection of hard exudates from fundus images based on SVM and improved FCM[J].Journal of Chongqing University (English Edition),2018,17(3):77~86
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A novel method for detection of hard exudates from fundus images based on SVM and improved FCM
GAO Wei-wei1, SHEN Jian-xin2, WANG Ming-hong1, ZUO Jing1
1.College of Mechanical Engineering, Shanghai University of Engineering Science, Shanghai 201620, P. R. China;2.College of Mechanical & Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China
摘要:
Diabetic retinopathy (DR) is one of the most important causes of visual impairment. Automatic recognition of DR lesions, like hard exudates (EXs), in retinal images can contribute to the diagnosis and screening of the disease. To achieve this goal, an automatically detecting approach based on improved FCM (IFCM) as well as support vector machines (SVM) was established and studied. Firstly, color fundus images were segmented by IFCM, and candidate regions of EXs were obtained. Then, the SVM classifier is confirmed with the optimal subset of features and judgments of these candidate regions, as a result hard exudates are detected from fundus images. Our database was composed of 126 images with variable color, brightness, and quality. 70 of them were used to train the SVM and the remaining 56 to assess the performance of the method. Using a lesion based criterion, we achieved a mean sensitivity of 94.65 and a mean positive predictive value of 97.25 . With an image-based criterion, our approach reached a 100 mean sensitivity, 96.43 mean specificity and 98.21 mean accuracy. Furthermore, the average time cost in processing an image is 4.56 s. The results suggest that the proposed method can efficiently detect EXs from color fundus images and it could be a diagnostic aid for ophthalmologists in the screening for DR.
关键词:  diabetic retinopathy  improved FCM  support vector machines  hard exudates  fundus images
DOI:10.11835/j.issn.1671-8224.2018.03.001
分类号:
基金项目:Supported by the National High Technology Research and Development Program of China (863 Program) (No. 2006AA020804), Fundamental Research Funds for the Central Universities (No. NJ20120007), Jiangsu Province Science and Technology Support Plan (No. BE2010652), Program Sponsored for Scientific Innovation Research of College Graduate in Jangsu Province (No. CXLX11_0218), Shanghai University Scientific Selection and Cultivation for Outstanding Young Teachers in Special Fund (No.ZZGCD15081).
A novel method for detection of hard exudates from fundus images based on SVM and improved FCM
GAO Wei-wei1, SHEN Jian-xin2, WANG Ming-hong1, ZUO Jing1
1.College of Mechanical Engineering, Shanghai University of Engineering Science, Shanghai 201620, P. R. China;2.College of Mechanical & Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China
Abstract:
Diabetic retinopathy (DR) is one of the most important causes of visual impairment. Automatic recognition of DR lesions, like hard exudates (EXs), in retinal images can contribute to the diagnosis and screening of the disease. To achieve this goal, an automatically detecting approach based on improved FCM (IFCM) as well as support vector machines (SVM) was established and studied. Firstly, color fundus images were segmented by IFCM, and candidate regions of EXs were obtained. Then, the SVM classifier is confirmed with the optimal subset of features and judgments of these candidate regions, as a result hard exudates are detected from fundus images. Our database was composed of 126 images with variable color, brightness, and quality. 70 of them were used to train the SVM and the remaining 56 to assess the performance of the method. Using a lesion based criterion, we achieved a mean sensitivity of 94.65 and a mean positive predictive value of 97.25 . With an image-based criterion, our approach reached a 100 mean sensitivity, 96.43 mean specificity and 98.21 mean accuracy. Furthermore, the average time cost in processing an image is 4.56 s. The results suggest that the proposed method can efficiently detect EXs from color fundus images and it could be a diagnostic aid for ophthalmologists in the screening for DR.
Key words:  diabetic retinopathy  improved FCM  support vector machines  hard exudates  fundus images
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