Hi,
Take a look on samples / mkgrayer.c, mkcmy.c and mktiff8.c, these
are samples on how to build profiles.
Basically you have to setup a callback function. lcms code will call
your function with the node inputs and you have to return the intended
output values.
Regarding 8-bit, you are lucky. This was a last time addition in lcms-1.12:
When creating the profile, add a 8 in the mode string:
handle = cmsOpenProfileFromFile("output.icc", "w8")
That's all, remaining conventions are unchanged.
Regards,
Marti Maria
The little cms project
http://www.littlecms.com
[EMAIL PROTECTED]
----- Original Message -----
From: "kis joe" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Saturday, December 20, 2003 7:50 PM
Subject: [Lcms-user] help pls/LUT based printer profile (B2A1)
dear list/Marti Maria
01.
Id like to construct an algorythm (and later code it)
for building a LUT based output profile
02. Profile spec (part of it)
B2A1 (ICC Media-Relative Colorimetric Intent)
8bit LUT
Input channels: 3 (L a b)
Output channels: 4 (C M Y K)
CLUT-points: 32
(Index runs from 0 to 32767)
03.
I have the following table (only example):
Patch printer input measured printed output
nr L a b C M Y K
0 10 5 8 55 80 90 2
1 20 -5 -9 10 80 100 20
2 ...
etc up to 1000 or so
04.
Id like to generate only the B2A1 table now.
How can i do it ?
Its practically a little profiling sw.
05.
Any help just to go in the right direction ?
thank you
joe
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