problem with removing noise in colormap

Question

joanna on 3 Jan 2013

0
Link

Direct link to this question

https://www.mathworks.com/matlabcentral/answers/57816-problem-with-removing-noise-in-colormap

How do I remove noise from this image? http://i138.photobucket.com/albums/q279/joannazan/noise_zps6c1bf767.png

1 Comment
Show -1 older commentsHide -1 older comments

Walter Roberson on 3 Jan 2013

I'm not sure why you say "in colormap" ? Is it an indexed image? Is it a 2D data array being displayed with a colormap ?

Sign in to comment.

Sign in to answer this question.

Answer 1

Image Analyst on 3 Jan 2013

0
Link

Direct link to this answer

https://www.mathworks.com/matlabcentral/answers/57816-problem-with-removing-noise-in-colormap#answer_69975

You need to remove noise from the original gray scale image, not the pseudocolored image. And I'm not even sure you need to do that. What do you want to do with this image? It may be possible to do it without doing any noise reduction at all. If you still think you need to, please upload your original gray scale image (if you can legally do so since it looks like it might be a medical image). There are a variety of noise reduction methods. Literally hundreds of them. They range from the simple (box averaging, median) to a little smarter and more sophisticated (knn, sigma, bilateral) to more complicated (BM3D, K-SVD, K-LLD, uinta etc.)