MATLAB: How to delete values of grayscale under 0.5 in a matrix

deletegrayscalematrix

hey all I have a matrix with values of 0 to 1 in order to use grayscale, however I need to delete or set any value that is below 0.5 to zero. any suggestions? john

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m(m<0.5) = 0

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MATLAB: Matrix if statement is above .5 then can I re enter it to show .5

I'm sure it's covered in the Getting Started tutorials. It's basic matrix indexing.

A = rand(10, 10)*2-1; %create matrix between -1 to 1, for demo
A(A < -0.5) = -0.5;
A(A > 0.5) = 0.5

MATLAB: Threshold of 0.5

If you are referring to the default level for http://www.mathworks.com/help/images/ref/im2bw.html then it is using a simple ">=" comparison. One of the names for that is "binarization"; there are other names.

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MATLAB: Matrix if statement is above .5 then can I re enter it to show .5

MATLAB: Threshold of 0.5

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