[Insight-users] How to do contrast adjustments

[soheilghafurian]

Hi

I restate my problem with an example:

I have an image with pixel values between 0 and 255. all my non-zero pixels
are higher than 200. I want to transform it to an image so that my nonzero
pixels start from somewhere near zero and the highest one is 255. 

Could anyone tell me how I should do that please?

Thanks a lot 

Soheil

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