Ive schrieb:
> clipka wrote:
>> Likewise, the PPM format properly defines how gamma should be handled 
>> *always*.
> 
> Err, where did you get this from. In case you are referring to the 
> NETPPM toolkit and its CIE/ITU Rec. 709 specification you should be 
> aware that this is only valid for files written by this toolkit and not 
> for pgm/ppb/pbm/pnm files written by one of the numerous other 
> applications in the UNIX world. Therefor pnmgamma (to gamma-correct 
> other files) is part of this toolkit.

Yes, that's exactly the source I had it from, and even that actually 
also notes that "a common variation on the PPM format is to have the 
sample values be 'linear,'", which I had perfectly failed to notice.

As I said, the summary you provided on gamma handling in various file 
formats is greatly appreaciated :-)

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