Calculate the conrast by the difference between the highest and lowest intensity value

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dila suay 2023-3-18

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回答： Matt J 2023-3-18

I would like to calculate the image Contrast which I defined as the difference between the highest and lowest intensity value of the image. However I want to ignore a certain percentage of pixels to account for outliers (otherwise a single white and black pixel would lead to "full contrast")

How can I ignore any values outside mean+-std andt hen I will calculate the max(img)-min(img) ?

Thank you so much

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Answer 1

Matt J 2023-3-18

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You could use medfilt2 or medfilt3 to get rid of the outliers. You could then use discretize to bin the data into bins of width 2*std for the purposes of computing contrast.