4 ms·
I'm about to walk out the door so I can't look up papers, but I'm going to guess that it's based as much on dynamics as actual proportions of limbs. I would es
by diydsp 8y ago
I'm about to walk out the door so I can't look up papers, but I'm going to guess that it's based as much on dynamics as actual proportions of limbs. I would estimate the number of features to be on the scale of 2000-2010 era facial recognition. Dynamics would increase the number of dimensions, making it possible to separate two people with nearly identical features.
However, I do agree that inferring the proportions from video imagery at various angles and with various items of clothing is going to be challenging due to systemic distortion, e.g. inferring incorrect angle due to clothing.
- cxseven 8y agoIf they blanket an area with cameras, as China does, they can use multiple vantage points to get more accurate measurements and, when a positive ID is made, they can persistently track that person crossing from one field of view to another. I think the main advantage of gait analysis (or limb proportion measurement) is that it will encourage a more efficient, decentralized computation that first distills the observed data into a fingerprint that can be more easily transmitted over a wire to a massive database for matching, rather than the alternatives of either replicating that database or transmitting raw, high-bandwidth data. Besides limb measurements, they could also use last known location, residence, and vehicle ownership information to increase the certainty of loose matches.