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Iris sensors are just NIR cameras illuminated by a maximum of three different frequencies. Samsung used to put them in their phones and they seem to have been
by Tade0 3y ago
Iris sensors are just NIR cameras illuminated by a maximum of three different frequencies.
Samsung used to put them in their phones and they seem to have been using just one frequency.
- ethanbond 3y agoRight but those are not installed on every corner and store in every western city like standard “gait-sensing” cameras are.
- Tade0 3y agoActually, most of the 24/7 surveillance cameras that I've seen already include a ring of NIR diodes for night vision and a sufficiently close photo from one would suffice. Even better: the wavelengths used are in the range of 700-900nm, which, as indicated by my smartphone camera picking up the 850nm diodes in my Leap Motion controller, are within the range of off-the-shelf camera sensors. For a decent image you need the iris to span 70 pixels. A Full HD camera probably won't cut it, but a 4k one installed at the entrance of a building might well be scanning irises and we wouldn't even know it.