Is there a relation between absolute and relative luminace with rgb pixel values in hdr image?

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Mojtaba 2018-2-13

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https://ww2.mathworks.cn/matlabcentral/answers/382467-is-there-a-relation-between-absolute-and-relative-luminace-with-rgb-pixel-values-in-hdr-image

关闭： John D'Errico 2018-2-13

(As once had been posted but no one has answered it yet) I want to measure the relative and absolute luminace of hdr images by using matlab. I read several papers and I know there are many software generating this (photosphere, photolux, aftab). However, for my reaserch, I should write a code to do that conversion.