METHOD FOR CODING / DECODING A MULTI-FREQUENCY VIDEO SEQUENCE ON THE BASIS OF ADAPTIVE COMPENSATION OF LOCAL DIFFERENCES OF BRIGHTNESS WITH INTER-FRAME PREDICTION (OPTIONS)

摘要

1. A method for adaptively compensating for local differences in brightness during inter-frame prediction of frames in the process of encoding and decoding a multi-angle video sequence implemented by a computer system and including the following operations: - obtain pixel values of the current encoded block belonging to the encoded frame and pixel values of the reference block, belonging to the reference frame; - get restored, that is, encoded and then decoded, pixel values from the vicinity of the current to block of the encoded frame and pixel values from the vicinity of the reference block of the reference frame; characterized in that: - exclude from consideration pixels belonging to the vicinity of the current encoded block and the neighborhood of the reference block of the reference frame, which are estimated as invalid for calculating the brightness variation parameters according to a predetermined at least one criterion; - determine the numerical relations between the pixels of the reference block, valid pixels from the vicinity of the current encoded block and reliable Ixel vicinity of the reference block; - given the initial values, calculated values of luminance correction parameters based found by numerical relationships; - estimate the change of the pixel values of the reference block; if the change is assessed as significant, the correction of the pixel values of the reference block is performed using the found correction parameters. 2. The method according to claim 1, characterized in that the procedures for determining the ratios for the pixels of the current encoded frame and the reference frame, the definition of the correction parameter change i