[Image-SIG] Replacing a single color

howard@eegsoftware.com howard@eegsoftware.com
Tue, 10 Dec 2002 16:25:43 -0800

I would like to take some images (from ImageGrab) and replace all
the pixels of one color (the gray plot backgrounds) with another color (white).

Seems I am using up ink at an incredible rate.

Is there some easy way to do this?  It looks like I have to apply a eval function 
to each pixel but I'm a little confused/unclear about this.
Howard Lightstone