Filling regon

Hi. I need ideas on How to fill the dark regions that have white regions inside, to make them completely white. I don't need implementation just ideas of what algorithms or methods I can use to do that. Thanks in advance.

This is the example image: http://i.imgur.com/Fr98t.png

Answer 1

[Sean de Wolski]

If it would be filled by an:

imfill(X,'holes');

AND is white in the original image; then it might be (Where X has the darker values as true.

It's hard to understand what you mean from that image. Is dark the middle color (grayish) or is it black or is it both?

[Jason]

Hi. Thanks for your answer. I just replaced the black background to clarify more, look: http://i.imgur.com/kuGBh.png. I just need to completely fill the gray regions with white but only the ones that are already partially filled. This would be the final result: http://i.imgur.com/JFSBB.png

Answer 2

[Sean de Wolski]

Steps:

• Do a connected components analysis (bwconncomp) on a logical image of anything you want.
• Find the linear indeces of all white pixels
• Use cellfun and ismember to see if, in each connected component there is white (CC.PixelIdxList)
• if there is, set that entire cell's set of linear indeces to white - else do nothing