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

[Petr M. <mi...@ph...>]

> 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.

> Let me point out something else I've noticed.  Using "test palette", the 
> gamma correction looks different between X11 and PostScript.  Or at least it 
> looks that way to me.  The reason I say that is because in the X11 output I 
> can't see the "0" within the black area, but I can see "0" within the black 
> area in the PostScript file.

For me, they look pretty similar. (On the other hand, for publications, I 
like to change gamma...)

BTW, there was a bug in 'test palette' which I've just fixed.

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PM