how we can imfill a thing that it is very similar to a hole but in fact it is not a hole?

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how we can imfill a thing in an binary image that it is very similar to a hole but in fact it is not a hole?
I attached a simple image that in the left side there is a thing that looks like a hole but it is not a hole
  4 Comments
Image Analyst
Image Analyst on 25 Sep 2014
Sean, it's been posted before. Unfortunately she's carrying on this discussion in 4 or 5 different discussions. Last I left it, I showed her how to use activecontour: http://www.mathworks.com/matlabcentral/answers/155374#comment_238290

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Answers (2)

Matt J
Matt J on 14 Sep 2014
Edited: Matt J on 14 Sep 2014
Use imclose either to seal it, or to turn it into a hole which can then be treated with imfill.
  3 Comments
Matt J
Matt J on 25 Sep 2014
You could also use regionprops or bwconncomp to separate the lungs in two separate images. Then you could imclose with the original strel that was working well. Then you recombine the images.
It would also be worth attaching the challenging black and white lung image in a .mat file, so that other people can play with it.

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Image Analyst
Image Analyst on 14 Sep 2014
Like I said in the discussion that was this first part of this question before you started this one, you can use activecontour(). See attached demo. If you can't figure how to adapt the demo, let me know. Either way, with imclose() or activecontour(), it will smooth out the perimeter and snip off that bay/incursion.
  11 Comments
Image Analyst
Image Analyst on 17 Sep 2014
You can use imfreehand() to manually draw a line across it. Any other way will end up filling in or smoothing other little nooks and crannies at other places along the perimeter.
sara
sara on 24 Sep 2014
thanks Image Analyst I cant do it manually... you said :"Any other way will end up filling in or smoothing other little nooks and crannies at other places along the perimeter" do you mean using imclose() or smoothing filter?? can you explain it more??
thanks a lot

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