[GRASS5] g.pnmcomp and Gamma correction (gis.m slider?)

[Glynn Clements]

Markus Neteler wrote:

> while generating RGB composites, I came across the
> problem that sometimes maps appear as too dark
> (also when shading maps).
> 
> Glynn, would it be possible to add Gamma correction
> to g.pnmcomp and, if so,

Possible: yes. Sensible: no.

If needed, gamma correction should be applied before the maps are
rendered, by modifying either the colour table or the cell values
(probably the former).

Maybe r.colors needs a gamma= option?

-- 
Glynn Clements <glynn at gclements.plus.com>