Method for determining movement vectors or field model movement vectors between successive digital images for video compression, involves calculating vector or vectors field according to calculation that is replaced by another calculation

摘要

The method involves calculating (C1) vector or estimated vectors field according to a first calculation by a sinusoidal regression, where the first calculation is reiterated by successive sinusoidal regressions until reaching a sufficient precision of the vectors or vectors field. The first calculation is replaced or supplemented by a second calculation (C2) when a condition is reached between brightness gradients according to a multiplication of average of the brightness gradients and a difference in brightness between corresponding images pixels is divided by a square of a gradient norm. An independent claim is also included for a video encoding and decoding system.