Fingerprint Scanner That Works From 6 Feet 83
Bruce Schneier found a somewhat older story that I haven't seen before about a device that is smaller than a tissue box, but uses two 1.3 megapixel cameras and a polarized light source to scan a fingerprint from two meters away.
Not to be technical on a tech site..but (Score:4, Interesting)
Could someone explain how this works? Is this some sort of speckle interferometer? I don't understand how you can get the ridge profile by separating the light polarities unless you're shining the laser at very steep angles..
Good News (Score:4, Interesting)