<html><head></head><body><div style="font-family: Verdana;font-size: 12.0px;"><div> <div> <div name="quote" style="margin:10px 5px 5px 10px; padding: 10px 0 10px 10px; border-left:2px solid #C3D9E5; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"> <div style="margin:0 0 10px 0;"><b>Gesendet:</b> Montag, 04. Dezember 2017 um 09:11 Uhr<br/> <b>Von:</b> "Jan-Peter Homann" <homann@colormanagement.de><br/> <b>An:</b> "Christoph Schäfer" <christoph-schaefer@gmx.de><br/> <b>Cc:</b> "Eric Soder" <eric.soder@topics.ch>, "everding@freiefarbe.de" <everding@freiefarbe.de>, "Peter Jäger" <peter@pre2media.ch><br/> <b>Betreff:</b> CxF- colour plattes (e.g. from freie Farbe) in Open Source applications</div> <div name="quoted-content"> <div style="background-color: rgb(255,255,255);"> <div class="moz-cite-prefix">Hi Christoph,<br/> Thank you for your engagement with the Scribus team. I have some more questions, which probably need to be dicussed with the english speaking open source / prepress community:<br/> <br/> 1) Handling spectral CxF data in open source applications:<br/> ------------------------------------------------------------------------------<br/> - Do you know any existing open source libraries, which are converting spectral-data to Lab ?<br/> - If yes, it is possible to combine this library with littleCMS (e.g. to make it easy for applications using littleCMS to convert spectral-data to Lab and use in littleCMS ?)<br/> - if yes, do you think it makes sense to intergrate CxF support into this library ?<br/> <br/> 2) CxF as universal XML-based dataformat for colour palettes in color critical open source applications ?<br/> CxF ist is quite powerful dataformat to describe colour palettes. I supports not only spectral data, but also Lab-based colour palettes as also device specific color palettes (e.g. RGB or CMYK for a specified profile)<br/> So far as I know, is CxF the only data format, which can be used to describe colour palettes and which is ISO standardized.<br/> <br/> So it may makes sense to discuss the handling of colour palettes not only Scribus related but in general for open source applications. It is e.g. possible to create a a CxF colour palette which contains:<br/> - spectral data<br/> - Lab-data for defined lightning condition (e.g. D50)<br/> - sRGB data<br/> <br/> - specialized applications could use the spectral-data,<br/> - ICC aware applicatons with LCMS support could use the Lab D50 data<br/> - all other applications could use the sRGB-data<br/> <br/> 3) Coordinate Scribus CxF Support with other Open Source projects ?<br/> Do you think, that that it makes sense to coordinate the CxF support in Scribus with other open source projects, to e.g. create a library for CxF support with e.g. following functionality:<br/> - extract RGB colour palettes for applications without LCMS support<br/> - extract Lab- colout palettes for applications with LCMS support<br/> - convert spectral data to Lab for applications with LCMS support, if no Lab-data is available ?<br/> <br/> Use cases would e.g. be:<br/> - use CxF palettes in othe applications like e.g. Inkscape<br/> - visualize a CxF color palette in 2D or 3D based on RGB-values<br/> <br/> Regards<br/> Jan-Peter</div> <pre class="moz-signature">-- Homann colormanagement tel: +49 30 611 075 18 Jan-Peter Homann mob: +49 171 54 70 358 Herzbergstr. 55 <a class="moz-txt-link-abbreviated" href="http://www.colormanagement.de" target="_blank">www.colormanagement.de</a> 10365 Berlin <a class="moz-txt-link-freetext" href="mailto:homann@colormanagement.de" onclick="parent.window.location.href='homann@colormanagement.de'; return false;" target="_blank">mailto:homann@colormanagement.de</a> </pre> </div> </div> </div> </div> </div></div></body></html>