CHROMiX

Need of the input and output table in ICC profile

Hi,
In the A2Bn or B2An tags for an output device class I wanted to know
why there is a need of a i/p and o/p lineriazation table when we have already a CLUT which is completely non-linear . What I mean to say
is that the i/p and the o/p tables can be removed if the values in the i/p table are mapped and entered in a CLUT table . ?

At 8:29 PM -0800 11/30/05, pravin_med wrote:

Hi,
In the A2Bn or B2An tags for an output device class I wanted to know
why there is a need of a i/p and o/p lineriazation table when we have already a CLUT which is completely non-linear . What I mean to say
is that the i/p and the o/p tables can be removed if the values in the i/p table are mapped and entered in a CLUT table . ?

I think they’re there to allow for linearization prior to using the CLUT. Sometimes it can be very handy to convert non-linear device values into a linear form prior to getting into 3-D / 4-D space. Basically it makes the math easier. Also, the curves can be adjusted after the fact to accommodate device drift.

Regards,

Steve


o Steve Upton CHROMiX www.chromix.com
o (hueman) 866.CHROMiX


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