Plan-view projections of depth image data for object tracking

Details Plan-view projections of depth image data for object tracking Plan-view projections of depth image data for object tracking

2006-02-21

2006-02-21

Chawan, Sheela (Department: 2625)

Image analysis

Applications

Target tracking or detecting

C382S154000, C382S209000, C348S169000

Reexamination Certificate

active

07003136

ABSTRACT:
Object tracking systems and methods are described. In one aspect, a three-dimensional point cloud is generated from a time series of video frames and partitioned into a set of vertically-oriented bins. The point cloud is mapped into one or more plan-view images each containing for each vertically-oriented bin a corresponding pixel having one or more values computed based upon one or more attributes of the point cloud members occupying the corresponding vertically-oriented bin. The object is tracked based at least in part upon one or more of the plan-view images. In another aspect, one or more original object templates are extracted from at least one of the one or more plan-view images, and the object is tracked based at least in part upon a comparison of at least one of the object templates with regions of the corresponding plan-view images. In another aspect, the point cloud may be discretized along the vertical axis into two or more horizontal partitions.

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T. Darrell et al., “Plan-View Trajectory Estimation With Dense Stereo Background Models,” ICCV'01, pp. 628-635 (Jul. 2001).

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