I need to draw 3 circles on retinal images for classification.Can we draw circles of required radius using matlab program?.

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Manisha
Manisha 2013-4-24
回答： Image Analyst 2020-6-27
Hi,I am doing project on Diabetic Retinopathy. I need to classify retinal images into mild,moderate and severe conditions.For this classification I have to draw 3 circles-1/3 of optic disc diameter,1 optic disc diameter and 2 OD diameter.Please suggest me the matlab program to draw circles automatically.

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Vineet
Vineet 2013-4-24
Use the following command: pdecirc(xc,yc,radius) specify the center of the circle in xc and yc.
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Anoop
Anoop 2015-2-23
please attach your code as its for Diabetic retinopathy grading using 3 circles.Even I am need of it very badly
Anoop
Anoop 2015-3-8
i did it using region props and pixel list and used circle.m program to get required output
Image Analyst
Image Analyst 2020-6-27
Assuming you have the centroid (x,y) and diameter of the optic disk, you can use viscircles():
% Get 3 centers.
centers = repmat([x, y], 3, 1]);
% Make diameters of 1/3, 1, and 2 times the optic disk diameter.
diameters = [opticDiskDiameter / 3, opticDiskDiameter, 2 * opticDiskDiameter];
% Draw the circles over the image.
viscircles(centers, diameters);

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