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

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.

[arun anoop m]

use boundingbox in matlab to "Rectangle" around the object

[Image Analyst]

I think you meant viscircles(), not bounding box.

Answer 1

[Vineet]

Use the following command: pdecirc(xc,yc,radius) specify the center of the circle in xc and yc.

[Manisha]

Thank you for the reply. But I have to draw circle on the image.The command which you have mentioned is not working.

[Anoop]

please attach your code as its for Diabetic retinopathy grading using 3 circles.Even I am need of it very badly

[Anoop]

i did it using region props and pixel list and used circle.m program to get required output

Answer 2

[Anoop]

please attach your code as its for Diabetic retinopathy grading using 3 circles.Even I am need of it very badly

Answer 3

[Anoop]

i did it using region props and pixel list and used circle.m program to get required output

Answer 4

[Image Analyst]

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);