[sane-devel] gamma correction procedure

[abel deuring]

abel deuring wrote: [some stff about ICC profiles]

What I forgot: The core idea of ICC profiles is to use RGB or CMYK 
colour values _only in combination_ with a profile, i.e., if you have an 
image file from a scan, you need to "assign" the scanner's ICC profile 
to the scan. This allows to calculate something like device independent 
(or "absolute") colour values; in a second step, the profile of an 
output device (monitor or printer) is used to transform the colour 
values into RGB or CMYK values appropriate for the monitor/printer.

The JPEG, TIFF and EPS formats allow to embed a profile in the files, 
and this profile allows to calculate the device independent colour values.

A good start to learn more about ICC profiles is the website 
http://www.coloraid.de, and also http://www.color.org

Abel