Ahmed Sayed Elhossiny Adawy <br/><br/>
Automatic detection of retinal fundus images features for detection of diabetic retinopathy /  
 الكشف التلقائى لميزات صور الشبكية لقاع العين للكشف عن اعتلال الشبكية السكرى 
Ahmed Sayed Elhossiny Adawy ; Supervised Amr Abdelrahman Shaarawi , Amr Abdelrahim Mustafa Eldeeb  
 - Cairo :   Ahmed Sayed Elhossiny Adawy ,   2015 
 - 80 P. :   facsimiles ;   30cm 
<br/><br/>Thesis (M.Sc.) - Cairo University - Faculty of Engineering - Department of Systems and Biomedical Engineering  
<br/><br/> The main purpose of this research is to build a system capable of identifying the normal anatomical structure of the retina and the bright lesions which are caused by diabetic retinopathy. This is done by digital image processing technologies. In the first step Gabor filters were employed to increase the intensity contrast between the blood vessel and the background. Next we used entropic threshold, in order to classify each pixel in the blood vessels and other areas. Then to determine the optical disk location, we used iterative thresholding. Then we applied the geometric model that relied on the implicit active contour in order to accurately determine the boundary of the optical disk. In the final stage entropic threshold was applied to determine bright lesions such as hard exudates and cotton patches in the fundus images. This method achieved a sensitivity and specificity of 95.8% and 90.5%, respectively  
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<br/><br/><label>Subjects--Index Terms: </label>Diabetic Retinopathy Fundus Retinal Digital Image Gabor Filter