03 March 2018 2 7K Report

Hi all,

I want to measure the contrast of pictures with natural scene. But I found the classical method (transforming those pictures to gray image firstly and then calculating mean intensity, M contrast or RMS)for calculating contrast can not reflect the real contrast of these colorful pictures: The pictures seem to have higher contrast observed by eyes get lower contrast values using the classic calculating way.

Do you know any other methods of calculating the contrast or brightness?

Thank you!

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