MATLAB: Draw circle on image, center to center

digital image processingMATLABphotogrammetry

Hello Every One.
I want to draw circle on image, center to center, the radius equal to quarter of the image side length. How can I do please

Best Answer

Maybe this is what you're looking for,
>> A=rgb2gray(imread('wagon.jpg')); imshow(A);
>> [m,n]=size(A);
>> drawcircle('Center',[n,m]/2+0.5,'Radius',length(A)/4)
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