On Thu, Sep 26, 2013 at 1:21 PM, Rik Cabanier <cabanier@gmail.com> wrote: > > > > On Thu, Sep 26, 2013 at 4:35 AM, Henrik Andersson <henke@henke37.cjb.net>wrote: > >> Rik Cabanier skriver: >> > >> > 5. How to handle content that has an RGB only operation (such as a >> > colormatrix filter) during export to CMYK >> >> Wouldn't that particular filter make just as much sense as per channel >> blend modes? After all, it is a per channel operation. Kinda. >> > > not really. Color matrix [1] uses a 4x5 matrix. > To do the same thing in CMYK, you'd need a 5x6 one. > > PDF/Adobe allows you to see a colorspace for a blending operation but in > almost all cases it's the same colorspace as the document. > > >> >> It would obviously need a dedicated configuration for other color >> spaces, but the operation itself should make sense. >> >> Question is, has anyone actually tried using a color matrix on anything >> besides RGB? Not counting shenanigans to setup the matrix to convert to >> rgb before the main effect... >> > > I'm not sure. I could ask our PhotoShop people. > FYI Photoshop's channel mixer can apply a color matrix to CMYK data.
Received on Thursday, 26 September 2013 21:01:52 UTC