Just an idea, since you seem to enjoy finding all these awesome ways to do color correction. Would you be able to implement a function in your color correct tool that scans a video file for the frame with the most visible colors (of course including qualifiers that require a certain amount of those colors have to be within a select range of each primary color so that you don’t just get a frame with 100,000+ shades of red.) If I’m correct, given that single frame, you’d be provided with the best option for a single frame color model full film correction.