Removing black patches from an image
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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?
3 commentaires
Image Analyst
le 31 Mar 2013
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.
Réponses (2)
Walter Roberson
le 30 Mar 2013
blueimage = originalimage(:,:,3);
bwimage = blueimage >= threshold;
2 commentaires
Walter Roberson
le 30 Mar 2013
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
le 3 Nov 2018
how to delete the dark areas in image processing?
1 commentaire
Image Analyst
le 3 Nov 2018
This is not an Answer to soumyadip's question.
What does "delete" mean to you?
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