[Radiance-general] ximage vs. pcond

[Gregory J. Ward]

Hi Roland,

Pcond and ximage use completely different implementations of the 
histogram adjustment operator.  By design, they should be reasonably 
well matched if you use the default options for pcond and "ximage -e 
auto", or "pcond -s -c" to match "ximage -e human".  However, because 
the histograms are computed in a slightly different way, you can 
sometimes get discrepancies.

If you want your output to match the ximage display, I suggest you use 
normtiff rather than pcond, which performs tone-mapping using the same 
algorithms in ximage, and converts to a 24-bit RGB TIFF output.

-Greg