Remove artefact when dilating Image

Question

Jason 2017-1-10

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评论： Jason 2017-1-16

Hi. I have a hexagonal grid that I have managed to locate the location of the maximum in each feature (with the kind help of Walter & I.A)

I next want to use these locations to then get the weighted centroid to be more accurate.(i.e. use them as seeds)

But to prepare for RegionProps, I create binary image that I dilate slightly:

se = strel('disk',2);
binary=imdilate(binary,se,'same');

This works except for a little artifact shown by the redline.

I really need at least 1 pixel perimeter round the seeding locations to ensure I can perform a weighted centroid calc, but the artefact treats the 2 joined objects as one and its centroid is incorrectly position in the middle of the two blobs.

Is there away where I can break up the joined blobs but still retain enough pixels to allow centroid calc.

Thanks for any help Jason

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Jason 2017-1-13

anyone?

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Answer 1

Changoleon 2017-1-13

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https://ww2.mathworks.cn/matlabcentral/answers/319802-remove-artefact-when-dilating-image#answer_250547

编辑：Changoleon 2017-1-13

So what's the problem? that two objects are connected to each other? if yes, use the function imopen.

https://www.mathworks.com/help/images/ref/imopen.html

What it will do is it will erode the image first with a certain limit (you chose this limit) and then will dilate it again. The tiny part which is making two objects as one, will be removed