How to select only round objects from this image?
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I am working on images that have round and some non-round objects and I want to select only the round objects. How can I select only round objects from the image in post https://www.mathworks.com/help/images/identifying-round-objects.html ?
Any help is appreciated.
采纳的回答
Image Analyst
2020-3-7
Threshold the image to get the blobs, then compute circularities and filter to get those with circularities near 1:
mask = imbinarize(grayImage);
mask = imfill(mask, 'holes');
labeledImage = bwlabel(mask);
props = regionprops(mask, 'Area', 'Perimeter');
allAreas = [props.Area];
allPerimeters = [props.Perimeter];
circularities = allPerimeters .^ 2 ./ (4 * pi * allAreas);
% Get those blobs with circularity near 1.
roundindexes = find(circularities > 0.8 & circularities < 1.5)
% Get new mask
roundBlobs = ismember(labeledImage, roundIndexes);
imshow(roundBlobs);
title('Only the round blobs')
3 个评论
Mohammad Farhad Aryan
2020-3-7
Amal
2022-7-22
what is the function ismember
Image Analyst
2022-7-22
ismember tells you if some or all of one list is contained in another list.
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