How to fill BLACK a region in an image?
조회 수: 7 (최근 30일)
이전 댓글 표시
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?
댓글 수: 0
채택된 답변
Image Analyst
2013년 12월 12일
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?
댓글 수: 0
추가 답변 (2개)
Steven
2013년 12월 12일
편집: Steven
2013년 12월 18일
댓글 수: 1
Image Analyst
2013년 12월 12일
That looks like a binary image. So why is imfill() not working?
filledImage = imfill(binaryImage, 'holes');
Walter Roberson
2013년 12월 13일
Why not just assign 0 to the roi regions? If they are defined as polygons, then poly2mask() to get the bitmap.
댓글 수: 8
Image Analyst
2013년 12월 14일
Like this???
% Find the binary image
binaryImage = grayImage > thresholdValue; % say 200 or something.
% Make those pixels black.
grayImage(binaryImage) = 0;
참고 항목
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!