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 on 24 Apr 2013
Answered: Image Analyst on 27 Jun 2020
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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Answers (4)

Vineet
Vineet on 24 Apr 2013
Use the following command: pdecirc(xc,yc,radius) specify the center of the circle in xc and yc.
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Anoop
Anoop on 23 Feb 2015
please attach your code as its for Diabetic retinopathy grading using 3 circles.Even I am need of it very badly

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Anoop
Anoop on 23 Feb 2015
please attach your code as its for Diabetic retinopathy grading using 3 circles.Even I am need of it very badly
Anoop
Anoop on 8 Mar 2015
i did it using region props and pixel list and used circle.m program to get required output
Image Analyst
Image Analyst on 27 Jun 2020
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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