Whoever builds a wearable “sparkler” that is able to disrupt digital cameras or the underlying tech in a way that doesn’t require the user to wear a large scarf or similar is going to really usher in an interesting part of history.
Your face is just one of a myriad of things that can be recognized and tracked.
There are so many facets of the human body which can all be combined. Can't see your face? Who cares- I can see how far apart your eyes are, how tall you are, your shoulder-to-elbow length, your walking speed, and your approximate weight. You're dogman144, and you spend an average of $26.34 per visit.
Ya tracking its more than just face. Thinking of some wearable RF-ish broadcaster, use it disrupt the comp vision that is a root for biometrics of various types. I know I’m hand waving a lot of stuff technically though.
AFAIK those only work because cheap cameras lack IR filters, for both cost-cutting and night-vision reasons. More advanced cameras have IR filters, rendering such devices useless.
You can obscure your face from many cameras with bright IR leds, but then you become "that one guy who's face shows up on camera as a bright washed out blur." It's like trying to hide an airplane from radars by broadcasting megawatts of broadband noise; possible but not particularly useful.
