Patent ID: 6901110
Filing Date: 2005-05-31
Classification: G06T,H04N

Abstract:
1. A process for tracking motion of an object image in a sequence of video frames, comprising: a. Inputting information into computer processing capacity identifying a first frame and a second frame of the sequence of video frames; b. Inputting information identifying a first bounded area within the first frame and a second bounded area within the second frame, the bounded areas each containing an image of the object; c. Defining a plurality of sub areas in the first bounded area and for each sub area: d. Using said first bounded sub area gradients to select sub areas which meet a predetermined first threshold as representative of sufficient object edge information; e. Defining a plurality of sub areas in the second bounded area and for each second bounded area sub area: f. Using said second bounded area sub area gradients to select sub areas which meet a predetermined first threshold as representative of sufficient object edge information; and g. Applying a search algorithm to said selected sub areas to determine a plurality of motion vectors that represent motion of the object image from first frame to second frame, including: