Darktable Input Color Profile Manager

NOTE: darktable now has built-in color calibration. Use that instead.

The Makefiles in this directory build ICC color profiles from TIF images of color calibration cards supported by ArgyllCMS and install them into your Darktable configuration.

Installation

Prerequisites:

• ArgyllCMS
• EXIFTool
• GNU Make
• POSIX shell and utilities

Preparing a Profile

Shoot an image of your calibration card, prefereably in raw format.

Open the image in darktable.

Remove all history except orientation.

Crop and rotate the image so just the color patches of your calibration card are visible.

Apply spot white balance from the Neutral 8 area of your calibration card (on X-Rite cards, this will be row 4, column 2).

Set the Input Color Profile:

• Profile to Linear Rec709 RGB
• Gamut Clipping to Off

Set the Output Color Profile:

• Output Intent to Perceptual
• Output Profile to Linear Rec709 RGB

Set the Color Picker (Left Pane):

• Set pull-downs to Area, Mean, Lab
• Click the eyedropper
• Read the white square of the calibration card (Lower left on X-Rite)
• Adjust exposure so L value is about 90; repeat as necessary.

Export the file:

• 16-bit, uncompressed TIF
• Max dimension 1000 px
• Profile: Image Settings

Exit darktable.

Create a subdirectory for the new profile and put the

Clone the Makefile from the sample directory into the new profile directory and adjust the contents as necessary.

Run make install in the subdirectory. There are also uninstall and clean targets; these are also available in the top-level Makefile to operate on all profiles.

Start darktable. The new profile will be available for use.