Patent ID: 8451900
Filing Date: 2013-05-28
Classification: G06T,H04N

Abstract:
1. A method of global motion estimation, comprising the steps of: determining profiles of frames of an input video signal, wherein each profile comprises a value, for each pixel in a first direction of the frame, which is obtained by combining pixels in a second direction of the frame; comparing profiles of frames by shifting a profile of one frame with respect to a profile of another frame to determine at least one first shift value where a minimum in a difference between profiles occurs; updating the profiles by shifting one of the profiles by using one of the determined first shift values representing a pixel shift in the first direction and subtracting another one of the profiles from the shifted profile to obtain updated profiles; and comparing updated profiles to obtain at least one second shift value where a minimum in a difference between updated profiles occurs, wherein a plurality of possible first shift values are determined and a confidence metric is used for each of the possible first shift values to select the first shift value that is used in the step of updating the profiles.