How do I delete values of grayscale under 0.5 in a matrix?

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john creighton
john creighton 2014-12-4
评论： john creighton 2014-12-4
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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Guillaume
Guillaume 2014-12-4
m(m<0.5) = 0

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