Abstract:

An improved technique for Lucas-Kanade optical flow was proposed, which was used in the field of gait recognition. Firstly, a constrained equation of high-order gradient was introduced, and then Hessian matrix can be computed. Secondly, the reciprocal of conditional operators of Hessian matrix was taken as the weighted matrix of Lucas-Kanade flow field. This method can eliminate the unreliable constrained points of local neighborhood, and increase the stability of the basic solution of the constrained equation. The experiment results showed that the proposed method can establish the optical flow field for human gait precisely

Key words: gait recognition, optical flow, gradient