Want to find the circular regions

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MD RESHAD UL HOQUE
编辑： MD RESHAD UL HOQUE 2019-3-4
I want to detect circles and remove extra parts with zeros. I tried to detect it using matlab builin function hough transform but it could not detect any cirles. Can anyone suggest me how to detect those circles and remove the others parts (not circles)?
[centers, radii, metric] = imfindcircles(im,[1000 1100]);

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Image Analyst
Image Analyst 2019-3-4
Compute the circularities and determine the circularity that is the dividing line between a circle and non-circle
labeledImage = bwlabel(binaryImage);
props = regionprops(labeledImage, 'Area', 'Perimeter');
allAreas = [props.Area];
allPerimeters = [props.Perimeter];
circularities = allPerimeters .^ 2 ./ (4 * pi * allAreas);
acceptableCircs = circularities < 4; % Or whatever works
indexes = find(acceptableCircs);
circBlobsOnly = ismember(labeledImage, indexes);
imshow(circBlobsOnly);

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