Patent ID: 8457410
Filing Date: 2013-06-04
Classification: G06T

Abstract:
1. A method of determining the optical flow vector of a plurality of image pixels between two consecutive images in a group of images, the method comprising the steps of: (i) creating multiple sets of said group of images wherein each set contains a decreasing number of pixels per image; (ii) defining an optical flow motion model applicable to the group of images in terms of a set of basis functions; (iii) representing the optical flow vector of each image pixel by different coefficients of the same optical flow motion model; (iv) starting with the set of group of images with the lowest number of pixels per image, determining respective over-parameterized optical flow vectors at the pixels responsively to motion between the images in the group by computing respective regularized coefficients of the basis functions at each of the pixels; (v) interpolating the optical flow vectors determined in step (iv) to the next higher resolution set of group of images and refining the estimation using the over-parameterized optical flow representation; and (vi) repeating step (v) until the highest resolution set of group of images is reached.