Gesendet: Montag, 04. Dezember 2017 um 09:11 Uhr
Von: "Jan-Peter Homann" <hom...@colormanagement.de>
An: "Christoph Schäfer" <christoph-schae...@gmx.de>
Cc: "Eric Soder" <eric.so...@topics.ch>, "everd...@freiefarbe.de" <everd...@freiefarbe.de>, "Peter Jäger" <pe...@pre2media.ch>
Betreff: CxF- colour plattes (e.g. from freie Farbe) in Open Source applications
Von: "Jan-Peter Homann" <hom...@colormanagement.de>
An: "Christoph Schäfer" <christoph-schae...@gmx.de>
Cc: "Eric Soder" <eric.so...@topics.ch>, "everd...@freiefarbe.de" <everd...@freiefarbe.de>, "Peter Jäger" <pe...@pre2media.ch>
Betreff: CxF- colour plattes (e.g. from freie Farbe) in Open Source applications
Hi Christoph,
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:
1) Handling spectral CxF data in open source applications:
------------------------------------------------------------------------------
- Do you know any existing open source libraries, which are converting spectral-data to Lab ?
- 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 ?)
- if yes, do you think it makes sense to intergrate CxF support into this library ?
2) CxF as universal XML-based dataformat for colour palettes in color critical open source applications ?
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)
So far as I know, is CxF the only data format, which can be used to describe colour palettes and which is ISO standardized.
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:
- spectral data
- Lab-data for defined lightning condition (e.g. D50)
- sRGB data
- specialized applications could use the spectral-data,
- ICC aware applicatons with LCMS support could use the Lab D50 data
- all other applications could use the sRGB-data
3) Coordinate Scribus CxF Support with other Open Source projects ?
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:
- extract RGB colour palettes for applications without LCMS support
- extract Lab- colout palettes for applications with LCMS support
- convert spectral data to Lab for applications with LCMS support, if no Lab-data is available ?
Use cases would e.g. be:
- use CxF palettes in othe applications like e.g. Inkscape
- visualize a CxF color palette in 2D or 3D based on RGB-values
Regards
Jan-Peter
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:
1) Handling spectral CxF data in open source applications:
------------------------------------------------------------------------------
- Do you know any existing open source libraries, which are converting spectral-data to Lab ?
- 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 ?)
- if yes, do you think it makes sense to intergrate CxF support into this library ?
2) CxF as universal XML-based dataformat for colour palettes in color critical open source applications ?
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)
So far as I know, is CxF the only data format, which can be used to describe colour palettes and which is ISO standardized.
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:
- spectral data
- Lab-data for defined lightning condition (e.g. D50)
- sRGB data
- specialized applications could use the spectral-data,
- ICC aware applicatons with LCMS support could use the Lab D50 data
- all other applications could use the sRGB-data
3) Coordinate Scribus CxF Support with other Open Source projects ?
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:
- extract RGB colour palettes for applications without LCMS support
- extract Lab- colout palettes for applications with LCMS support
- convert spectral data to Lab for applications with LCMS support, if no Lab-data is available ?
Use cases would e.g. be:
- use CxF palettes in othe applications like e.g. Inkscape
- visualize a CxF color palette in 2D or 3D based on RGB-values
Regards
Jan-Peter
-- Homann colormanagement tel: +49 30 611 075 18 Jan-Peter Homann mob: +49 171 54 70 358 Herzbergstr. 55 www.colormanagement.de 10365 Berlin mailto:hom...@colormanagement.de
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