| 摘要 |
PROBLEM TO BE SOLVED: To disclose a method and system for determining an optical flow field between a pair of images.SOLUTION: Each of a pair of images is decomposed into image pyramids using a non-octave pyramid factor. The pair of decomposed images is transformed at a first pyramid scale to second derivative representations under an assumption that a brightness gradient of pixels in the pair of decomposed images is constant. Discrete-time derivatives of the second derivative image representations are estimated. An optical flow estimation process is applied to the discrete-time derivatives to produce a raw optical flow field. The raw optical flow field is scaled by the non-octave pyramid factor. These steps are repeated for the pair of images at another pyramid scale until all pyramid scales have been visited to produce a final optical flow field, and spatiotemporal gradient estimation is warped by a previous raw optical flow estimation. |
