Removing black patches from an image
조회 수: 3 (최근 30일)
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Hi,
I have the following image
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/151983/image.png)
I want to remove the black noisy regions on the right hand side, so as to keep only the digits in black and the rest in white. How to proceed?
댓글 수: 3
Image Analyst
2013년 3월 31일
That threshold was a disaster. It's just an example for you to learn where global thresholds don't work when you have large global gradients. There really is no point at all in trying to fix this image or doing what you ask. It's much better to avoid the problem in the first place. I solved it in your duplicate question using color segmentation - take a look back at your original question.
답변 (2개)
Walter Roberson
2013년 3월 30일
blueimage = originalimage(:,:,3);
bwimage = blueimage >= threshold;
댓글 수: 2
Walter Roberson
2013년 3월 30일
For example, if the original image is "I", have a look at
T = I;T(T(:,:,[3 3 3])<64 | T(:,:,[1 1 1])>80) = 255;image(T)
fateme moein
2018년 11월 3일
how to delete the dark areas in image processing?
댓글 수: 1
Image Analyst
2018년 11월 3일
This is not an Answer to soumyadip's question.
What does "delete" mean to you?
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