Package: colord Version: 1.2.1-1+b2 Severity: normal Dear Maintainer,
I am using Debian testing with a wide gamut monitor (LG 27EA83, 99% AdobeRGB). I recently tried to convert a number of RGB images to CMYK (AdobeRGB to ECI ISO coated 300%). The workflow is described here: http://darktable.org/redmine/projects/users/wiki/Preparation_for_offset_printing_-_converting_to_CMYK Usually, conversion to CMYK makes colors a bit dull. Viewing my conversions I found that all image viewers on my Linux system are showing the CMYK image as being a lot more saturated than the original RGB images. Meanwhile I have viewed CMYK images from other sources: They are also shown to be overly saturated. At the same time, scribus has its own CMYK engine and shows the images alright, like they are shown on a sRGB display or a Windows system. So I don't think this is an issue with my images/imagemagick, but a general issue with the way CMYK images are displayed. This effect doesn't happen on a regular sRGB display. The small gamut display looks similar to the Windows 7 display of the image. I suspect that the conversion engine somehow converts the CMYK values for display to sRGB values, and and displays these sRGB values as absolute values, even though my display is AdobeRGB, and so they are oversaturated. As far as I understand, colord is the conversion engine, so it might be responsible for this. Thanks for your work! -- System Information: Debian Release: 8.0 APT prefers testing APT policy: (900, 'testing'), (500, 'stable-updates'), (500, 'proposed-updates'), (500, 'stable'), (10, 'unstable') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 3.16.0-4-amd64 (SMP w/4 CPU cores) Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/bash Init: systemd (via /run/systemd/system) Versions of packages colord depends on: ii acl 2.2.52-2 ii adduser 3.113+nmu3 ii colord-data 1.2.1-1 ii dconf-gsettings-backend [gsettings-backend] 0.22.0-1 ii libc6 2.19-13 ii libcolord2 1.2.1-1+b2 ii libcolorhug2 1.2.1-1+b2 ii libdbus-1-3 1.8.12-1 ii libglib2.0-0 2.42.1-1 ii libgudev-1.0-0 215-7 ii libgusb2 0.1.6-5 ii liblcms2-2 2.6-3+b3 ii libpolkit-gobject-1-0 0.110-3 ii libsane 1.0.24-4 ii libsqlite3-0 3.8.7.1-1 ii libsystemd0 215-7 ii libusb-1.0-0 2:1.0.19-1 ii policykit-1 0.105-8 colord recommends no packages. colord suggests no packages. -- Configuration Files: /etc/colord.conf 9db95ab0e80e37f67c23033e9d5d00c1 [Errno 2] Datei oder Verzeichnis nicht gefunden: u'/etc/colord.conf 9db95ab0e80e37f67c23033e9d5d00c1' -- no debconf information -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
