darktable-chart we provide a tool for extracting luminance and
color values out of images taken from color reference cards like IT8.7/1 charts. Its main
purpose is to compare a source image (typically a largely unprocessed raw image) to a
target image (typically a JPEG image created in-camera) and produce a darktable style that
is able to convert luminance and color values of the source image to produce the target
image. This style employs the tone curve module, the input
color profile, and the color look up table module for that
purpose (see Section 188.8.131.52, “Tone curve”, Section 184.108.40.206, “Input color profile”, and
Section 220.127.116.11, “Color look up table”).
Some cameras are particularly advanced in offering various film simulation modes of your
choice. With the help of
darktable-chart and the underlying modules
you can now create styles that replicate these film simulations from within darktable.