How to fill BLACK a region in an image?
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Steven
el 12 de Dic. de 2013
I have an image (no matter gray or binary). I want to fill several regions (that are selected by the user through interface) in BLACK!
imfill and roifill cannot do this, because they fill in white!
(I think roifill is exactly what I need, but it fills them white not black!)
Does anybody know how I can resolve my problem?
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Image Analyst
el 12 de Dic. de 2013
It does matter if they're grayscale or binary. You will probably have to use morphology. For example you might need to erode or dilate your binary image so that you don't fill with white. Or you might be able to use logical indexing. Can you post your image so I can recommend a method?
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Más respuestas (2)
Steven
el 12 de Dic. de 2013
Editada: Steven
el 18 de Dic. de 2013
1 comentario
Image Analyst
el 12 de Dic. de 2013
That looks like a binary image. So why is imfill() not working?
filledImage = imfill(binaryImage, 'holes');
Walter Roberson
el 13 de Dic. de 2013
Why not just assign 0 to the roi regions? If they are defined as polygons, then poly2mask() to get the bitmap.
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Image Analyst
el 14 de Dic. de 2013
Like this???
% Find the binary image
binaryImage = grayImage > thresholdValue; % say 200 or something.
% Make those pixels black.
grayImage(binaryImage) = 0;
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