Jörg Rosenkranz wrote:
I am trying to calibrate my Nikon D90 using Argyll CMS and a target from Silverfast (http://www.silverfast.com/show/dc-targets/en.html). I have the problem that there is no CHT file for this target. The layout (number of rows and columns) is like the ColorChecker SG but I could not figure out whether I can modify the ColorCheckerSG.cht to work with this target. You can find a hires photo here: http://flickr.com/gp/joero/7dvNN4
The target is certainly rather reminiscent of the ColorChecker SG, although various details are different. I've created a .cht file and put it at: <http://www.argyllcms.com/LaserSoftDCPro.cht>, and checked it out against your photo. (I think SilverFast is the scanner software, while the charts are all called LaserSoft). How do you get the CIE reference file ? Is it provided with the chart ? Can you send me an example ?
Is there any documentation describing the creation of CHT files for starters?
There is, but it's a bit of an art. Recently I've been creating them by hand rather than trying to build them up from the raw recognition data (the scanin -g output). See how you go. Graeme Gill.