On 3/5/2018 5:11 PM, Toerless Eckert wrote: > Any idea if there is a save minimum you can publish. Aka: the > small resolution of your face, reuse a picture everywhere, linkedin, > ietf,... Required resolution depends on context. Face recognition works by comparing the captured face to a set of N possible candidates, and returning the best match. The more pixels you have, the more precise the recognition, but there are claims that as little as 64x64 can be used for recognition -- probably for finding one user among 4096. Basically, if you can recognize the face in the picture, you have to assume that machines can do that too. Reusing the same picture everywhere seems like a reasonable strategy. Of course, that will not stop the immigration agents who are taking your picture while scanning your passport. Someone mentioned paper bags, but people are seriously looking at makeup and accessories specifically designed to fool the algorithms. Check for example https://cvdazzle.com/. Maybe that will be the new IETF look... -- Christian Huitema
