LOCALLY TENSING AND RELAXING METHOD FOR PREDICTING OPTICAL FLOW

摘要

PROBLEM TO BE SOLVED: To enable exact action prediction and picture quality improvement, by separating the velocity coupling term of Poisson's equation and then applying a replaced frame difference concept. SOLUTION: An input such as the current frame of a continuous image picture to be coded is impressed to a subtracter 10, and the output of subtracter 10 is coupled to the input of a spatial coder 20. The output of the spatial coder 20 is impressed to the inputs of a video coder and a spatial decoder 30. Besides, that input is inputted to an optical flow predictive circuit 90. The Poisson's equation to be used for optical flow prediction is designated into linear matrix form like Gx=Ex+b E and G are 22 matrix and (b) is an input vector} corresponding to the change of time, and the velocity coupling term of the designated Poisson's equation is separated. the replaced frame difference is applied corresponding to the Poisson's equation from which the velocity coupling term is separated. When measuring the degree of change in a stored image range while using the replaced frame difference, an optimum flattening constant is reduced.