12:30pm
EQuad E415
Title: Fast Optic Flow with Wavelets
Abstract: The described algorithm is a two frame differential approach where the optic flow equation is projected on wavelets. In this way small local linear systems are built at several scales and locations, with an assumption that the flow is locally constant. This allows at the same time to overcome time aliasing and the aperture problem. This approach can also be adapted to other models than a locally constant flow, like a piecewise linear flow, or a displacement flow plus illumination changes.
Some specific points of the implementation are shortly described (like large motion compensation, finite support analytic wavelets).
The suggested method is backed by convergence proofs and validated by numerical experimentation. It also shows to be computationally inexpensive (in O(N) if N is the number of pixels of the picture).