CMYK Conversion

[preahkumpii]

This is mainly directed towared boltbait. I looked on your website and viewed your cmyk plugin and gave it a try. I was going to just suggest something I found on gimp. I have no idea if it is feasible or anything. The website below had a very good cmyk conversion plugin that basically makes the image unchanged as far as appearance is concerned. The website is:

http://plasticbugs.com/?p=361

There are two different plugins mentioned there; apparently one is better than the other. Like I said, it may not be usable at all, but I figured it was worth looking at. If anyone else knows more, I would be interested.

[BoltBait]

It is impossible to convert from RGB to CMYK and have the image unchanged. Certain colors in RGB do not exist in CMYK. For example Blue (#0000FF) does not exist in CMYK.

I think that the implementation that I did gives a fairly accurate representation of what the image will look like when printed.

The only thing I can think is that they are doing some type of dithering... my effect is pixel-by-pixel translation. If they are using a dithering technique, it may be possible to get a more accurate color representation. However, this would not be a strict RGB to CMYK conversion.

[preahkumpii]

From my reading, I found the same as what you said, that the cmyk spectrum simply cannot reproduce exactly what rgb produces, especially in blues. I just thought, seeing the source codes for those converters is available, it may be possible to implement something from them that has made those converters appear successful.