[Image-SIG] Saturation function?

[Joao S. O. Bueno Calligaris]

On Wednesday 06 April 2005 18:44, meyer at mesw.de wrote:
> Can't you use the ImageEnhance module?
>
> http://www.pythonware.com/library/pil/handbook/imageenhance.htm
>
> I'm no expert in these things, but I believe that the "Color" value
> should be what is generally called "Saturation".
>
>

If that doesn't work, RGB <-> HSV conversion is more or less simple, 
and I had worked it in python for a GIMP-Plugin. 
My conversion is for working with palettes so it is a slow 
implementation - you will be better if the above module works. 
Otherwise, I can e -mail you my script. - a NumArray version of it 
should be usable for raster data.

	JS
	-><-




> Markus
>
> kevin at cazabon.com schrieb am 06.04.2005, 23:15:20:
> > Does anyone have a simple saturation adjustment function for PIL?
> >
> > I haven't been able to find anything through Google, other than a
> > VB script for converting between HSL and RGB.  That could be
> > hacked into a saturation function, but would be VERY slow...
> >
> > ANy suggestions would be most welcome, thanks!
> >
> > Kevin.
> >
> >
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