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Smartphone LED detects hidden cameras with AI

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Re: Smartphone LED detects hidden cameras with AI

#31

Post by dbspin »

stronglikedan wrote: post #17
thesuitonym wrote: post #7

Earlier quoted context omitted.

You don't need this to detect smart glasses, they're very obvious.

For now, but there's really no point in detecting them anyway, since there are plenty of truly concealed options for those that really want to be pervs.

Strongly disagree. Most crimes are crimes of opportunity. Most 'pervs' don't start out that way either. Detecting increasingly easy to conceal sousveillance devices is probably essential for any kind of normative public sphere to continue to exist.

Re: Smartphone LED detects hidden cameras with AI

#32

Post by evilduck »

rgj wrote: post #13
evilduck wrote: post #9

Earlier quoted context omitted.

Perhaps to avoid tipping off the entity recording you by blasting their hidden cameras with bright lights. Granted, the PoC device in the article is not exactly subtly looking, but if you could turn it into a sleek device it would be more useful. Not playing your hand while you're under surveillance lets you control the information they're receiving. Though the bigger issue with my theory is that while most cell phon…

Unless the hidden camera has IR capabilities.

That's actually much easier to detect, any camera without an IR filter would show an LED emitting where your eyes did not, no complicated solution necessary.

Re: Smartphone LED detects hidden cameras with AI

#33

Post by zack6849 »

carlostkd wrote: post #29

Until someone develops hidden cameras with AI that will be auto turned on couple of hours later after detecting presence at that time a scan was already performed and nothing was found.....

this works by looking at the physical characteristics of the lens, so on or off should work regardless, you could have something with some kind of internal shutter to cover the lens maybe

Re: Smartphone LED detects hidden cameras with AI

#34

Post by HnUser12 »

ssl-3 wrote: post #22
HnUser12 wrote: post #18

Earlier quoted context omitted.

I’d think so. My iPhone can see my remote’s IR.

It sees it poorly. IR is deliberately (though imperfectly) filtered in the optical path. The dim purpleish glow from a remote that is seen through [many] digital cameras would be quite bright if this IR filter weren't in place. It doesn't have to be that way, but it usually is that way anyway -- as a design intent. Cameras used for surveillance, meanwhile, often lack these filters. They're designed with more of a foc…

Ah ok that makes sense. I just pointed at my remote and it is very very dim.

Re: Smartphone LED detects hidden cameras with AI

#35

Post by HnUser12 »

happyopossum wrote: post #19
HnUser12 wrote: post #18

Earlier quoted context omitted.

I’d think so. My iPhone can see my remote’s IR.

That was true years ago, but I haven't been able to use an iPhone camera to pick up an IR signal in a long time. Just tested it to be sure they hadn't reverted to an unfiltered lens (17 pro) and nope, no IR visible.

I pointed at the remote of my fan and I can see it. I am on 15 Pro. However, as the sibling comment said, it is very faint so I'd guess not very realistic.

Re: Smartphone LED detects hidden cameras with AI

#36

Post by kragen »

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.

Lensless sensors (for example, using compressed sensing, or Hadamard shadow masks) can presumably defeat this, but also, watching from far enough away should defeat it. Hard to do that inside a pervert's AirBNB, though.

Re: Smartphone LED detects hidden cameras with AI

#37

Post by mitthrowaway2 »

kragen wrote: post #36

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.…

The junction detector is a truly brilliant idea that, unfortunately, is probably rendered nearly useless now that everything in the world has embedded electronics in it.

Re: Smartphone LED detects hidden cameras with AI

#39

Post by paul7986 »

kragen wrote: post #36

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.

Re: Smartphone LED detects hidden cameras with AI

#40

Post by Eisenstein »

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.
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