1 results about "Ground lift" patented technology

This invention provides a method and system for identifying bipedal foot-to-ground contact states based on monocular video, relating to the field of data processing technology. The method includes: acquiring a two-dimensional keypoint sequence of human posture from monocular video; performing robust outlier suppression and smoothing differentiation on the two-dimensional keypoint sequence to obtain a smoothed keypoint coordinate and velocity sequence; extracting multiple kinematic features related to the bipedal foot-to-ground contact state; determining the estimated direction of human movement through a viewpoint adaptation mechanism, and projecting the foot velocity based on the direction of human movement to obtain viewpoint-adaptive velocity features; modeling the bipedal foot-to-ground contact state using an unsupervised two-component Gaussian mixture model and calculating the posterior probability that the feet are in the support phase; performing joint temporal decoding of the bipedal foot-to-ground contact state using a four-state coupled hidden Markov model and a Viterbi decoding algorithm to obtain a temporally consistent bipedal foot-to-ground contact state sequence; and completing the identification of the bipedal foot-to-ground contact state by extracting ground contact events and ground lift events.