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> Also using this for AI training purposes.

Cool! Training for what? You can't just drop a juicy comment like this and then leave us hanging ;-)

It's explained in the video. Keying algorithms are getting better thanks to AI image techniques. However the training data they use is based on green screen technique so has the same issues at times. Using the sodium vapor method to film training data that looks correct to start with would improve these AI algorithms.

Very cool!

I would be interested in some links!

After you using sodium vapor out a different light source?

Different frequency.

Any thoughts on whether some frequencies are superior to others for various reasons, or what strengths/weaknesses different frequencies have?

The frequencies I’m using are very specific to the subject I’m filming. It’s closer to a machine vision problem, and it isolates the desired object almost perfectly from the background. I’ve considered filing for a patent, it works that well.