crosstalk matrix editor feature

[marcinz606]

some sneak peak for next release - built in crosstalk matrix editor. I just merged it to main.

[thetalkingdrum]

Thank you!

[thetalkingdrum]

Very happy you made this! I haven't had time to test it yet, but I certainly will.

It might also be worth mentioning in the docs that this can also be used as a kind of scanner/light source calibration tool, since scanner and camera crosstalk are essentially just different forms of crosstalk that end up in your final scan.

The narrowband aspect is interesting as well. As it seems that you often need to add some mixing instead of separation. Mostly in the red and green channels to make the saturation levels look natural.

[thetalkingdrum]

Did some testing this morning on a few pakon and coolscan files. It works well and is easy to use intuitively. Seems to work well for correcting narrowband scans.

Here is a pakon scan with a custom matrix I just dialed in by eye in a minute or two:

Then I tried the RGBScan input profile and no matrix. They are quite close (and I did not use the RGBscan version as a reference for the first one):

Here is the default output with no matrix and input set to none, looks way too Disney/Legoland like in my opinion. Oversaturated unrealistic colors and reds go neon:

[thetalkingdrum]

From a Noritsu raw. Just pulling the sliders until it looks ok-ish:

Default matrix: