[Radiance-general] .pic file and tonemap

[Gregory J. Ward]

Hi Bei,

Rpict doesn't do any tone-mapping on its output -- what you get are  
in fact the radiometric values in a floating-point image format.   
Pcond or normtiff can be used for tone-mapping.

The differences between machines may be due to variations in the  
random number generator.  If you set -ps 1, I expect your results  
will look more similar, though they still won't be an exact match.

-Greg

> From: bei.xiao at gmail.com
> Date: August 8, 2006 1:30:42 PM PDT
>
> Dear Greg,
>  Greetings!
>  I have two questions. First, does rpict involve any tonemapping
> procedure?  In other words, does the .pic file contain the original
> data without any tonemapping? Second, I rendered the same input files
> with the same rendering parameters using the "rad" comman complied
> from the same version of Radiance on a mac and a linux machine. I got
> different .pic files. Not only the images look different ( the
> highlight on one sphere look brighter), but the .pic values are
> different.  I wonder why this happened. Has anyone experience this?
>
> Thanks for the advice,
>
> Bei