<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type"> </head> <body bgcolor="#ffffff" text="#000000"> Edmund<br> <br> What is the advantage to profile the printer in RGB-mode, if gutenprint allows it to do in CMYK ?<br> <br> Best Regards<br> Jan-Peter<br> <br> Am 16.05.11 19:11, schrieb edmund ronald: <blockquote cite="mid:BANLkTinaPwE_gAWZVvk=LMjmYoM4cUKT3g@mail.gmail.com" type="cite"> <div>We have a working process for RGB=> CMYK conversion and tested tools (Argyll) for RGB profiling to get the job done, so I think we will use this in the *immediate* future. I have tested the CMYK workflow in the past, and agree that it may become interesting, but a the moment I think we have a minimalistic way forward.</div> <div><br> </div> <div>Edmund</div> <div><br> </div> <div>On Mon, May 16, 2011 at 3:03 PM, Jan-Peter Homann <span dir="ltr"><<a moz-do-not-send="true" href="mailto:homann@colormanagement.de">homann@colormanagement.de</a>></span> wrote:</div> <div> <div class="gmail_quote"> <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> <div bgcolor="#ffffff" text="#000000"> Hello list, hello Edmund,<br> If the Gutenprint CMYK profile is applied in pdftoraster e.g. GhostScript as target profile, the print spool format can still be PDF DeviceRGB as it is today. <br> <br> GhostScript will take this data, uses its default sRGB-profile as source profile and converts to the target CMYK-profile.<br> Gutenprint gets optimized CMYK for the approbiate driver-setting.<br> <br> I don´t see any need to make RGB-profiles for Gutenprint for a color manages print path.<br> <br> </div> </blockquote> <div> </div> <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> <div bgcolor="#ffffff" text="#000000"> Best regards<br> Jan-Peter<br> <br> Am 16.05.11 13:23, schrieb edmund ronald: <div> <div class="h5"> <blockquote type="cite"><br> <br> <div class="gmail_quote">On Mon, May 16, 2011 at 10:10 AM, Jan-Peter Homann <span dir="ltr"><<a moz-do-not-send="true" href="mailto:homann@colormanagement.de" target="_blank">homann@colormanagement.de</a>></span> wrote:<br> <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> Hello to all,<br> <br> Reading the discussion about print targets, i missed some points:<br> <br> 1) CMYK Colorspace for profiling Gutenprint:<br> I strongly recommend to profile CMYK+X printers only with CMYK (+X) targets. Dealing with the relation of CMY to K is much better handled inside the printer ICC profile, than with a internal Gutenprint RGB_to_CMYK conversion and an RGB-printer-profile on the top.<br> <br> </blockquote> <div><br> </div> <div>This is an interesting remark. At the moment, we have working presets for some printers, and an internal working though not perfect RGB => CMYK conversions for Gutenprint; Historically RGB was sent better through CUPS. I suggest that we start with an RGB print path. Note also that Linux apps are not very good at separating to CMYK by a profile usually :) so for prototyping I think RGB is really the only choice, not because it is better or even as good, but just because we can. </div> <div><br> </div> <div>Edmund</div> </div> </blockquote> <br> <br> </div> </div> <div class="im"> <pre cols="72">-- ---------- Please note the new adress -------------- homann colormanagement --------- fon <a moz-do-not-send="true" href="tel:%2B49%2030%20611%20075%2018" value="+493061107518" target="_blank">+49 30 611 075 18</a> Jan-Peter Homann ------------ mobile <a moz-do-not-send="true" href="tel:%2B49%20171%2054%2070%20358" value="+491715470358" target="_blank">+49 171 54 70 358</a> Cotheniusstr. 3 -------- <a moz-do-not-send="true" href="http://www.colormanagement.de" target="_blank">http://www.colormanagement.de</a> 10407 Berlin -------- <a moz-do-not-send="true" href="mailto:homann@colormanagement.de" target="_blank">mailto:homann@colormanagement.de</a> </pre> </div> </div> </blockquote> </div> <br> </div> </blockquote> <br> <br> <pre class="moz-signature" cols="72">-- ---------- Please note the new adress -------------- homann colormanagement --------- fon +49 30 611 075 18 Jan-Peter Homann ------------ mobile +49 171 54 70 358 Cotheniusstr. 3 -------- <a class="moz-txt-link-freetext" href="http://www.colormanagement.de">http://www.colormanagement.de</a> 10407 Berlin -------- <a class="moz-txt-link-freetext" href="mailto:homann@colormanagement.de">mailto:homann@colormanagement.de</a> </pre> </body> </html>