I shared the origins of this project a couple of years ago (Precision CNC Masking Machine using Node-RED Dashboard & GRBL32 CNC Control)... I thought this newest functionality was worth an update.
The machine can now program the g-code toolpath itself from the live video feed... I call it "LookNC" (Look-n-See).
See linked video (only showing it following the toolpath, not the end function of applying a masking material).