Not sure how to run the test image script here
https://github.com/cessen/lut_extractor
Does it require certain dependencies?
Apologies if it's black and white in the readme but I can't get it to work.
Once you've cloned the repository and entered it in a command line:
git clone https://github.com/cessen/lut_extractor.git
cd lut_extractor
generate the test image using 'cargo':
cargo run -- --test-image
If you followed these steps, the test image will be available in the 'lut_extractor' folder, named 'lut_extractor_2560x1440.exr'.
You'll need git and cargo to run these instructions.