Omitting negative pixels in the image representation

Say that I have an image where there are some pixels which values are negative. How can I omit those from the image representation in `MATLAB`?

Thanks.

[Image Analyst]

What's going on? You already had a discussion on this going in http://www.mathworks.com/matlabcentral/answers/116236#comment_196593 and then you posted the same thing twice more. I deleted the version that no one has answered yet. Why would you want to look for answers in three separate threads?????

Answer 1

[Wayne King]

Depending on your data and application, you can just take the absolute value. If that doesn't work you can set all the negative values to zero using logical indexing

X = randn(256);
X(X<0) = 0;

[med-sweng]

@Wayne. Thanks for your reply. So, does giving pixels the value `0` means we are omitting them? And, does that also have the same meaning as `removing` them?

[Wayne King]

not sure how you want to remove them, removing them from what? analysis, display?

[med-sweng]

Removing them from the display

[Image Analyst]

Wayne already gave you code for that. Look above.