文摘
We develop an algorithm for the computation of a locally affine optical flow field as an extension of the Lucas-Kanade (LK) method. The classical LK method solves a system of linear equations assuming that the flow field is locally constant. Our method solves a collection of systems of linear equations assuming that the flow field is locally affine. Since our method combines the minimisation of the total variation and the decomposition of the region, the method is a local version of the $l_2^2$ -l 1 optical flow computation. Since the linearly diverging vector field from a point is locally affine, our method is suitable for optical flow computation for diverging image sequences such as front-view sequences observed by car-mounted cameras.