[magick-users] support for changing an image pallette?

[Bob Friesenhahn]

On Wed, 6 Nov 2002, Dave Rigby wrote:

> I'm currently evaluating Imagemagick++ for use in an image processing
> project; having previously using imlib2 I have run into some limitations
> of that library.
> However, there's a couple of things  I need to know about imagemagick,
> and I could't find out from the docs so here goes....
>
> I need to be able to alter the palette of an image, e.g.  change colour
> 0 to bright red
> However, I don't seem to see any way to obtain the palette / insert a
> new one with imagemagick++I? I need this to do stuff like normalising
> the image histogram /  or create monochrome images using a specific
> threshold.

Assuming that the image is in PseudoClass representation, you can do
this via the colorMap() method:

Color red("red");
image.colorMap(0,red);

Bob
======================================
Bob Friesenhahn
bfriesen at simple.dallas.tx.us
http://www.simplesystems.org/users/bfriesen