Graeme, I think the distinction is that an RGB proofing space would be shaped like a printer space - i.e., have print-referred image state. That is not the case with the common 'working spaces' as far as I know.  I am very interested to hear of a public domain print-referred RGB space.  It would be advantageous to use an existing one if such is available. Best regards, Ann McCarthy Lexmark CPD Imaging Systems Engineering ICC Workflow WG Chair <table width=100%> <tr valign=top> <td> <td>Graeme Gill <graeme@argyllcms.com> Sent by: openicc-bounces@lists.freedesktop.org 05/02/2006 07:34 PM <td>                To:        openicc@lists.freedesktop.org         cc:                 Subject:        Re: [Openicc] new: Proof colour space</table> Jan-Peter Homann wrote: > As I understand your concept of an "proofing colorspace" as an > intermediate colorspace between widegamut colorspaces like > camera-profiles on RAW data or AdobeRGB and printoutput. > > Finetuning of colors and saturation is done in the "proofing > colorspace", if the work is done, gamutmapping from "proofing > colorspace" to print output colorspace needs and can be done either with > relatice colorinteric and blackpoint-comepnesation or with ICCv4 > perceptual gamutmapping, if the gamut of the "proofing colorspace" is > similar of a better "reference medium gamut" for ICCv4 profiles. So your really talking about a "working space" then ? I don't see any connection to proofing. Normally the target output device (or an emulation of it) is the "proof", hence it's colorspace is the "proofing space" Graeme Gill. _______________________________________________ openicc mailing list openicc@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/openicc