Re: [ gnuplot-Bugs-1575425 ] "with image" ignores gamma for postscript output (fwd)

[Daniel J S. <dan...@ie...>]

Petr Mikulik wrote:
>> Hmm, well let's see.  I think one of these is preferred over the 
>> other, but not sure which.  With (2), would that mean cb2gray() is 
>> altered in some way?
> 
> 
> no, you would call pow(gray, 1.0/gamma) before writing each pixel to the 
> file.
> 
>> gray2gamma(cb2gray()).  Don't know... I think conceptually we'd like 
>> to keep our data non-tranformed.
>> I kind of like the way "test palette" behaves.  That is a really 
>> powerful tool in a way.  I'm thinking to avoid (2).  Agreed?
> 
> 
> Yes.

OK.  I'll have to consult the book to see images can use PostScript's gamma feature.  In the mean time, I've put a patch on SourceForge with the pow(gray,1.0/gamma) which seems to work.

Dan