[Radiance-general] Image calculations

[Lars O. Grobe]

Hi!

> Simple question: I need to divide one image with another … pixel by
> pixel, channel by channel. I.e., IM1(x,y,C) / IM2(x,y,C) for all x,y and
> for all channels RGB and have the result ordered as a new image.

Just for completeness:

pcomb -e 'ro=ri(1)/ri(2); go=gi(1)/gi(2); bo=bi(1)/bi(2)' -o image1.hdr 
-o image2.hdr > result.hdr

The -o flags are important to calculate with the original pixel values 
(usually radiance W/m2*sr) without any exposure effects.

Cheers, Lars.

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