Hello, I wanted to try the colour checker lut module with my Nikon D7200 and bought the requested IT8 target.
I followed the steps described here : https://github.com/pmjdebruijn/colormatch Which are more or less what is described here: https://www.darktable.org/2016/05/colour-manipulation-with-the-colour-checker-lut-module/ However I failed at the first step: > Open a candidate JPG in GIMP and verify there is no dust or > glare in the image. Then open the color picker, set sample > average, use info window and get HSV values. > > When you sample the white GS0 patch, you should see a value > of about 97%, and 3% for the black GS23 patch. I haven't managed to take a correct picture, even though I have followed the requested constraints : - direct sunlight at noon - 35mm objective (equivalent 50mm) - deactivate all "enhance" options (except lens distortion) - ISO 100 - aperture between f/8 and f/11 - bracketing 1/3 I'm using Gimp to sample the GS0 and GS23 patch, and I am always either above 97% for the GS0 patch or under 3% for the GS23 patch but never at the same time ! Is there something I am doing wrong ? Can someone give me some tips in order to get a correct picture ? Here are the current attempts: http://imgur.com/a/HBxHn Thanks in advance ____________________________________________________________________________ darktable user mailing list to unsubscribe send a mail to [email protected]
