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Phone cameras can see in IR. A classic trick to test if your TV remote is working is to look at the LED through a digital camera while pressing a button. Try it
by IIAOPSW 7y ago
Phone cameras can see in IR. A classic trick to test if your TV remote is working is to look at the LED through a digital camera while pressing a button. Try it right now if you don't believe me.
What's missing is screens which can display meta information in the IR channel. I say we call the image format IRGB.
- RandallBrown 7y agoiPhones have IR filters over them so that doesn't work anymore unfortunately.
- stephen_g 7y agoOn my iPhone 7 at least, the rear camera seems to have an IR filter but the front one does not (or perhaps it has a filter but is less effective). So I can still test remotes in 'selfie' mode.
- mattkrause 7y agoDoesn’t FaceID use structured IR light? If so, at least one of the cameras won’t have a filter.
- m-p-3 7y agoThe front camera usually doesn't filter IR.
- seanlinmt 7y agoAlso a good way to detect hidden surveillance cameras at night.
- lotyrin 7y agoThey might be sensitive to IR without sufficient filtering but they're not selective to it, I think the idea here is something like a IR,R,G,B pixel format. Maybe you could get military interest in it (digital Aerochrome).
- shaftway 7y agoYeah, I use it to see if my old remotes' batteries are dead. They can see in IR, but they can't distinguish it from other light. Maybe that's good enough.