[PD] pix_grey too much grey?

[Matteo Sisti Sette]

The same happens with pix_2grey.

If I understand correctly, while pix_grey changes the colorspace, 
pix_2grey actually computes the color values to convert the image to 
grey without changing the color space.
I had a look at the source code and the weight factors for converting 
RGB to grey seem correct, they do sum to 256, so it's really strange 
that white becomes 86% grey........


Matteo Sisti Sette escribió:
> Hi list,
> 
> Before I file a bug report (and since it seems strange that it hasn't 
> been reported already), I though I'd check if I'm missing something:
> 
> why in the attached patch isn't the white white? That is, after 
> converting with [pix_grey], white becomes a bit darker. Seems like some 
> factor in the conversion is wrong.
> Or am I missing something?
> 
> Is there any easy workaround?
> 
> thanks
> m.
> 
> 


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Matteo Sisti Sette
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http://www.matteosistisette.com