how can I remove small objects from binary image?

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nadia
nadia le 25 Oct 2016
Commenté : Image Analyst le 18 Oct 2019
I have a binary Image that is attached hear.my problem is small objects that are on the right side of image. how can I delete them such that the external border of breast(second border) is preserved and fill the breast ROI?thanks

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Image Analyst
Image Analyst le 25 Oct 2016
Well there are lots of ways. One is to try bwareafilt() and tell it a size range you want to extract. Another way is to try bwareaopen(). Another way might be to use regionprops and throw out blobs based on their x centroid location. Another way might be to scan down line by line, finding the first non-zero pixel, then moving over about 10 pixels and then erasing to the right of that. You might even combine some of them if one method does not get them all.
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Torkan
Torkan le 18 Oct 2019
Hi analyst,
Now, that we use the last line how can we create new image without those objects?
Image Analyst
Image Analyst le 18 Oct 2019
If youi wanted to remove them instead of keep them just set the labeled image to zero there and re-measure your properties:
% Use ismember to get those out into a new image
blobsToExclude = ismember(labeledImage, indexes); % These are blobs we don't want.
% Erase those blobs from our original binary image.
binaryImage(blobsToExclude) = false;
% Re-measure what's left.
labeledImage = bwlabel(binaryImage);
props = regionprops(labeledImage, 'Centroid', 'Area');

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