This sounds pretty awesome! I’m excited to try it out.
So, here are the converted dtstyles: https://drive.google.com/open?id=0B7S3WtYAN5gjdFhRMWc2c0xoVk0
Here is a quick snapshot comparison with my haldclut module (left) and the color checker lut output (right), using Kodak Portra 160 emulation:
With the original haldclut:
With converted color checker lut:
The converted color checker lut seems to have a yellowish tint while also having a bit less contrast (dE=2.47971), so I guess there is still some room for improvement.
Let me know if you find this useful.
Oh, I started work on something similar already. I’ll let you know how well my approach will work when done.
Nice results looks pretty close, note that the difference might also be explained due to the fact that the modules are not in the same place in the pipeline. I mention this since the dE is only ~2.5 if that is max dE it should be very hard to tell any difference in real life pictures I think (a dE of 2 is a Just Noticeable Difference aka JND)
Anyway if this continue like this my tutorial/howto will soon be outdated (in a good way since it all becomes much easier)
@dutch_wolf I am interested in using the HaldCLUT with darktable that I used with RawTherapee. I followed your video (thanks for sharing), I saw your script auto, but I can not compile it, I’m looking for the file hald_clut_4_with_gradient.pgm and .cht?
Or, can I find them?
Thank you very much.
Hi I didn’t make the script that is something @pkmx did for the cht and pgm files (although not sure if you need that particular one) those can be found here Dropbox - dt_chart_experiment_results.tar.gz - Simplify your life
Thanks for the files, it will advance my work.
Best regards.
Thanks again for the link to the files. I am able to work with testig_new exported in .pfm, I can load the .cht into dartable-chart.
I tried with a movie file and when I want to apply the file hald_clut_4_with_gradient.cht, I have: error parsing CHT file, (parse_cht: 364)
Not sure what you are trying to do there but the cht files is only for use with darktable-chart. If loading the file in darktable-chart gives errors I need to investigate what goes wrong.
EDIT: Okay indeed something goes wrong in both the release and git version of darktable-chart, although seems to be different things (release just gives the error, git version takes ages to load the cht file)
EDIT2: after some debugging and testing I have a new cht file that should work (remove the .txt extension .cht files are text files but only allowed to upload here with txt extension)hald_clut_4_with_gradient_v2.cht.txt (152 Bytes)
Thanks for the reply and the file. I try it and I tell you.
The debug script works perfectly. On the other hand, when I convert the .csv file to .dtstyle with darktable-chart and load it into the “style” tab of dartable, it does not load. It seems that there is a problem with with version 2.2.5?
Still thank you for the work done to run the script.
Best regards.
Can you upload the style somewhere?
I followed the tutorial of @dutch_wolf and added the 2 lines HDR00 and HDR01 to the .cvs file:
https://drive.google.com/file/d/0B1cvWUEQ2QwiUlBDLTVFMVhIZlE/view?usp=sharing
And then I used the darktable-chart command to get the .dtstyle file:
https://drive.google.com/file/d/0B1cvWUEQ2QwiT3g1dkE3ZUh3cWs/view?usp=sharing
I just re-tested. The profile DTStyle is well download in “style” of darktable but with a single black patch.
That is no longer needed. Nowadays you can directly export the style from the GUI, the CSV part can be skipped.
After looking at your CSV file I noticed that there are extra ;
at the end of the HDR lines. Once I removed those the style wasn’t all 0 any longer.
Edit: The colors are all wrong when using it though.
Thank you for telling me my mistake, sorry. I just fix but in the generated .dtstyle file if I apply it to a photo, I have only one patch in CLUT and the picture is black.
I managed to create a DTStyle directly with dartkable-chat by clicking on process and then on export.
A big thank you to all who helped me to overcome the creation of DTStyle. I have a PDF tutorial in French and I have it at your disposal if you are interested.
I just tried to compile the script for haldclut2dtstyle.sh. ./build does not end. There are compilation errors.
This script is compatible with version 2.2.5 of darktable.