Patent ID: 9247211
Filing Date: 2016-01-26
CPC Classification: A61B,G06K,G06T,G08B,H04N

Claim Text:
1. A video content analysis method comprising: receiving a video sequence that includes a plurality of frames, each frame including a video image; for each frame, receiving two-dimensional (2D) image data and also receiving depth data; processing the 2D image data of the video sequence to differentiate foreground data from background data and to detect one or more blobs comprised of the foreground data, the one or more blobs corresponding to one or more objects, wherein differentiating the foreground data from the background data is performed without analyzing the depth data; for each detected blob, using the depth data to determine whether at least part of the blob corresponds to at least part of a target by at least (1) mapping the blob to a set of Z-planes; (2) determining that on at least some Z-planes the blob is clustered into different blob regions corresponding to two objects separated in space; and (3) grouping the separated blob regions of the Z-planes into two physical objects by checking their spatial overlaps, wherein one of the physical objects corresponds to the target; and after it is determined that at least part of a blob corresponds to at least part of a target, tracking the target and detecting at least one event associated with the target.