Method for adaptive estimation of unwanted global picture instabilities in picture sequences in digital video signals
AssigneeDV Sweden AB
InventorsPeter Weiss, Bjorn Christensson
Life of this patent
Estimating the term…
Abstract
A method for estimation of global error motion vectors, which represent unwanted global picture instabilities in a picture sequence in digital video signals. The method uses a motion vector estimator with an adaptively variable measuring time distance, as well as spatial processing and temporal processing, in order to estimate a sequence of global motion vectors, from which a sequence of global error motion vectors is separated in order to allow stabilization of a picture sequence in digital video signals.
Claims8
A method for estimation of global error motion vectors, which represent unwanted global picture instabilities in an input picture sequence (101) in digital video signals, by using a motion vector estimator (102) with a specific measuring time distance (21) between pictures in said picture sequence, as well as spatial processing and temporal processing, in order to estimate a sequence of global motion vectors (109), from which a sequence of global error motion vectors (115) is separated, characterized in that said measuring time distance (21) used in the motion vector estimator is adjusted in response to a maximum length of said global motion vectors (30) and to a motion vector frequency, within a specific interval of the picture sequence (1), said measuring time distance (21) being increased in case only small global motion vectors and low global motion vector frequency are present and being decreased in case large global motion vectors are present and in case a high global motion vector frequency is present.
Dependencies are inferred from the claim text.