I'm working on a project that involves image tracking on laser cut/engraved materials (wood, acrylic, etc.) and I've gotten to a point where it's functional but fickle. There's a lot of jittering/blinking in and out due to things like burn marks or spots where the lines are too thin and the engraved area 'fell out'. Does anyone have experience with using laser cut materials for image tracking that could give me some pointers to get more consistent image tracking?