41–50 of 89 posts
I wonder if it works with smart glasses.
People normally do this by scanning a 10mW 832nm laser with a mirror, according to Dan Gelbart in https://www.youtube.com/watch?v=0MtRxX0crjU . The lecture is 77 minutes, covering nonlinear junction detectors, digital calipers, the US-embassy bug in Russia, laser microphones bounced off windows, and geometric errors from material relaxation. The bit about camera detectors is close to the end. Works for eyeballs too.…
For Meta they need to detect people giving wearers the finger to stop the glasses from recording or taking pics ha I do wear my Metas frequently though would never get the finger cause Im not a creep.
It appears that more people have just accepted that they will be filmed anywhere and everywhere.
I miss the old days.
If this worked with IR, and so non visible, it might be even more useful. Great idea though.
But then you would need an IR camera instead of using the phone's camera. An IR camera should be able to find some hidden cameras passively by detecting a heat source.
MWIR and LWIR cameras are often cooled and uses more exotic sensing mechanisms, sometimes even vacuum tube based, nowadays usually semiconductor based but not regular CMOS. Some require mechanical shutters obscuring view every other frame(that, I think, is where BHOT/WHOT switch came from; it must be switching whether to show odd or even frames).
You need the MEMS types or better to see heat; they're more often referred to as thermal cameras than IR cameras. They are also unable to see through regular soda-lime glasses, that might pose its own challenge as well.
The ideal detector should incorporate multiple methods. Someone should make a site that rates these for each detection method then adds them into an overall score.
Earlier quoted context omitted.
For Meta they need to detect people giving wearers the finger to stop the glasses from recording or taking pics ha I do wear my Metas frequently though would never get the finger cause Im not a creep.
Our culture has definitely changed from when Google Glass wearers were referred to as Glassholes. It appears that more people have just accepted that they will be filmed anywhere and everywhere. I miss the old days.
People normally do this by scanning a 10mW 832nm laser with a mirror, according to Dan Gelbart in https://www.youtube.com/watch?v=0MtRxX0crjU . The lecture is 77 minutes, covering nonlinear junction detectors, digital calipers, the US-embassy bug in Russia, laser microphones bounced off windows, and geometric errors from material relaxation. The bit about camera detectors is close to the end. Works for eyeballs too.…
For Meta they need to detect people giving wearers the finger to stop the glasses from recording or taking pics ha I do wear my Metas frequently though would never get the finger cause Im not a creep.
Wearing them out in public is definitely enough to get the finger and be called a creep, because many people think they're always recording. I think you're underestimating the hatred of modern tech.
Can't a thermal camera can do this? It should be able to detect any difference in ambient temp, even a few degrees, and a CMOS sensor gets warm, not to mention any wireless transmitters, power sources, and ICs. Turn off everything in the room and walk around with a ~$100 ali express handheld thermal camera.