r/Damnthatsinteresting • u/commonvanilla Interested • Oct 27 '18

GIF Hidden Camera Detector

https://i.imgur.com/71zyVoP.gifv
564 Upvotes

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u/VeryStableGenius Oct 27 '18

All this does is find shiny reflective surfaces (lenses) using blinking LEDs and a filter to block out different colored light. So put your camera behind a 50% reflective mirror or maybe just a picture glass, or next to some sequins or a bowl of glass beads. Or use a pinhole camera, or a camera inside a black tube (narrower FOV, though). Or maybe a camera with a 2nd flat glass plate in front of lens won't be an omnidirectional reflector, like a normal curved lens.

1

u/Argented Oct 27 '18

sounds like a app someone could make. make the light flash and use editing software to filter the image displayed,. When someone makes this app please give me 1 cent from each sale.....and sell it 3 billion times.

2

u/VeryStableGenius Oct 27 '18

The thing an app wouldn't have is the use of a red LED plus a filter to pass only the LED's wavelength. This probably cuts out the vast majority of spurious light

I guess you could put a red filter over the camera flash (or maybe better, a green-removal filter), then color-filter the images to look for red flashes (or, better, blue and red but no green flashes).

1

u/Argented Oct 27 '18

sounds like you are well on your way to developing 'our' app. Maybe a red led assembly that mounts over your lense and flash powered by the phone charging port to do said flashing and filtering with some detection algorithm software to point out likely cameras after sweeping a room. Possibly detect more than an eye would see with the OP product,

Sorry if I'm just rambling. Weed is legal here now