[Radiance-general] proper use of pcond and ximage

[frederic drago]

I am trying to map a scene (not rendered with Radiance, but saved as RGBE 
pic)using the histogram method with pcond.
Who can I map luminance values not from black to white but from dark
to white. Clearly shadows areas are not black, the output of pextrem is like 
that:
469 73  5.702972e-04 5.702972e-04 5.702972e-04
311 652 7.402344e-01 7.402344e-01 7.402344e-01

I can do it with linear mapping, but my purpose is really to use
the histogram method!!

This problem seems to be relevant to almost any scene.

Thanks for any advice.

Frederic Drago



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