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
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Bei
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: [email protected]
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