[Radiance-general] ICC profiles

[iebele]

Dear group,

I have a tone-mapping problem with printing hdr files, which are 
converted to 8-bit Photoshop-RGB colorspace.
In the print some clipping occurs.  To solve the clipping I was thinking 
to use normtiff  or pcond in combination with a Photoshop ICC profile 
(.icm files), which I a received from the printer operator. Regretably I 
don't understand the meaning of the parameters of normtiff and pcond 
enough, not even enough to get started . Does anybody have an idea if 
and how the data from ICC profiles can be used by normtiff?
The lines below are copy/paste from an .icm file, and i wonder if these 
can be of any use in tonemapping. Are the the tabular organized XYZ_X   
XYZ_Y   XYZ_Z valuable for this kind of application?

Any hints are very much appreciated,

Iebele



CREATED    "1/12/2007"  # Time: 16:17
INSTRUMENTATION    "SpectroScan"
MEASUREMENT_SOURCE    "Illumination=D50    ObserverAngle=2¡    
WhiteBase=Abs    Filter=Unknown"
KEYWORD    "SampleID"
KEYWORD    "SAMPLE_NAME"
NUMBER_OF_FIELDS    8
BEGIN_DATA_FORMAT
SampleID    SAMPLE_NAME    XYZ_X    XYZ_Y    XYZ_Z    LAB_L    LAB_A    
LAB_B
END_DATA_FORMAT
NUMBER_OF_SETS    918
BEGIN_DATA
1    A1    2.48    2.52    1.96    18.00    1.10    1.12
2    A2    3.04    3.14    2.53    20.61    0.15    0.53
3    A3    3.64    4.17    3.21    24.23    -5.73    1.61
4    A4    4.11    5.21    3.74    27.32    -12.11    3.35
5    A5    4.73    6.79    4.55    31.32    -20.99    5.45
6    A6    5.26    8.53    5.03    35.06    -30.46    9.31
etc...