On Mon, Mar 23, 2009 at 2:57 PM, Sven Neumann <sven@xxxxxxxx> wrote: > Hi, > > On Mon, 2009-03-23 at 20:43 +0100, Martin Nordholts wrote: > >> The product vision states that "GIMP is a high-end photo manipulation >> application" and that certainly includes support for editing images in >> the CMYK color space. > > It certainly doesn't. Photos are taken in an RGB color space. It makes > sense to do some processing in other color spaces such as LAB. But CMYK > is totally inadequate for manipulating photos. > > Being able to do a color separation to CMYK is sometimes required in > order to prepare an image for print (even though the printer can almost > always do this much better). Editing an image in CMYK is not required > though. It is helpful to see an approximation of CMYK on the screen before you go to print - many colors available in the RGB color space fall outside of the CMYK gamut. RGB blue is likely the worst offender - fill an image with solid #0000FF and print it to a color printer and you will see quite a shift in color. Take a simple case: annotating a photo with some text (for print use) - working in CMYK space would prevent the user from using #0000FF as the text color (or actually convert it from #0000FF to its CMYK equiv on the fly) - giving a reasonably accurate representation of the final printed output on the screen. A more complicated case: removing small black text from the CMY channels manually (to improve legibility) - or more realistically only applying the small text to the K channel. Editing the channels in CMYK would be more comfortable than running through the separation process first and then making changes - and the ability to use CMYK swatches (in this case C=0, M=0, Y=0, K=100) could also speed things up dramatically. Of course this is not a trivial task, and I'm not holding my breath. Although it might not be hard to throw up a projection of the current image with a generic CMYK profile applied to it - that would be enough to satisfy the simple use-case above. Oh, and I guess we're rapidly drifting off-topic in re to PDF export ;) Chris _______________________________________________ Gimp-developer mailing list Gimp-developer@xxxxxxxxxxxxxxxxxxxxxx https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-developer
