On Thursday 25 October 2007 23:18:04 norman wrote: > I would like to be able to produce a black and white negative > image from an ordinary colour image.
I'm lazy, so desaturating on luminosity works well enough for me. If I wanted to alter the colours, I'd put the image through a colour-map first. For example, I have a shot of an "evolutionary" sequence which runs from a little ape-like fellow through Magnon to a normal human standing tall, who then picks up a rake & starts to bend down again as a result, & so on through a jackhammer until he's sitting worshipfully at a computer keyboard. I boosted the blue (Colours, Curves) a fair bit, then desaturated that for a slightly sharper-looking monochrome image. Not sure why artists do this, but the modern-man figures were all Caucasian, & boosting the blue up fairly strongly, emphasised the contrast between these fellows & everyone else up to Mr Cro-Magnon, inclusive, who all had fairly mid-range colours.. Cheers; Leon _______________________________________________ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
