RetroTINK-4K Custom Color Matrix Instructions

 

Custom color gamut correction factors can be loaded by the user. Each file is a set of csv values describing gamma and Input RGB -> XYZ transforms. The RT4K will automatically apply the correct XYZ -> Output RGB matrix depending on the specified HDMI output colorimetry.

 

The csv file has 14 entries (all floating point) on a single line:

 

1. Input Gamma

2. Input Lift

3. Input Gain

4. Output Gamma

5. Transfer Function (0 = sRGB, 1 = Rec. 601/709, 2 = SMPTE 240, 3 = Conventional Gamma)

6-14. Input RGB -> XYZ Matrix Coefficients

 

Thanks to Dan Mons, Keith Raney (https://github.com/danmons/colour_matrix_adaptations/tree/main) and Extrems (https://www.gc-forever.com/wiki/index.php?title=Game_Boy_Interface) for providing technical assistance and example data.