I've slightly optimized my color correction script, but the PDF algorithm is still better at matching frames of the same shot.

However, the real strength of my current method is that it can color correct frames from completely different scenes.

Again the model is calibrated on frame 8228, where -1 video sample is matched to the GOUT:

Subsequently, the color correction model is used to correct a frame, which depicts a different scene with different colors.

Before versus after:

GOUT versus independent color correction: