Journal
MULTIMEDIA TOOLS AND APPLICATIONS
Volume 79, Issue 15-16, Pages 11107-11123Publisher
SPRINGER
DOI: 10.1007/s11042-018-6901-9
Keywords
Green channel; Median filter; Global threshold; Local binary pattern (LBP); Histogram orientation gradient (HOG)
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Diabetic retinopathy (DR) is initiated due to the severity of diabetes which can finally lead to an incurable blindness. It is a significant reason for optical damage that may cause blindness permanently. There are no main symptoms of DR appearing initially but its quantity and severity rises with the passage of time. Initial screening and diagnosis of DR may help to stop vision loss. Exudates (EXs) are one of the primary clinical symptoms of DR. In this manuscript, a computerized technique is proposed for DR detection based on EXs. The proposed system is consisting of four major steps. The first step is enhancement of region of interest using median filter and adaptive contrast enhancement method. After that, local variance and global threshold methods are utilized for candidate lesions segmentation. Moreover, texture features with multiple classifiers are applied for classification. The proposed method is evaluated in terms of sensitivity, specificity, accuracy and area under curve on DIARETDB1, MESSIDOR and local data sets.
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