Patent ID: 9710917
Date: 2017-07-18
CPC Classifications: G01P,G02B,G06T

Claim:
1. A method comprising: obtaining a first video captured by a first video camera with an imaging plane; obtaining a second video captured by a second video camera; by a processor, correlating, over time, representations of apparent motions observed at the imaging plane in the first video from frame to frame, the representations of apparent motions having respective uncertainties; and determining actual motions of a refractive field through which light passes from a textured background to the imaging plane by modelling translations of the refractive field as causing the apparent motions and weighting the representations of apparent motions as a function of their respective uncertainties, wherein weighting the representations of apparent motions as a function of their respective uncertainties includes defining weighted representations of apparent motions to be a logarithm of a covariance between a representation of apparent motion in the first video and a representation of apparent motion in the second video.