[metapost] defaultcolormodel

[Stephan Hennig]

schrieb luigi scarso:

> Conversion between color spaces needs a color profile.
> For example (0,0,0) -> (0,0,0,1) not always is the best choice.
> Generally a rgb color space is the a good choice:
> practically many  monitors and cameras (hence jpeg) have the same
> gamut (ie, the same color profile)
> and it is  one of the wider color space also --- i.e. one can assume
> that a rgb color is a real color
> A cmyk is often a virtual color: you need the profile of the medium
> (usually the paper) .
> And the profiles *differ* each other.

General colour space conversion requires profiles, true.  But speaking
about black only, what could be wrong with a mapping (0,0,0) <==> (0,0,0,1)?

Especially, if your looking at RGB colours as true colours that don't
require a profile for interpretation.  Then (0,0,0) must be interpreted
as pure black.  What would be a better match to pure black than
(0,0,0,1) in print?

Best regards,
Stephan Hennig