Patent Document ID: 8059153
Application ID: 10871046
Patent Status: 1

Claim One:
1. A method for tracking objects, the method comprising the steps of: capturing image data at each of a plurality of camera devices; processing, in each of a plurality of thin-client processors, the image data to obtain two-dimensional foreground region information by using a background subtraction algorithm, wherein the processing comprises determining background information at each pixel of the image data based on previously-determined foreground region information, and wherein the background subtraction algorithm determines foreground region information for each foreground region in the image data that corresponds to an object and uses a background model to separate the foreground region information for each foreground region from the image data; facilitating sending of the two-dimensional foreground region information to an apparatus having a processor configured to generate a three-dimensional visual hull; receiving, in each of the plurality of thin-client processors from the apparatus, background correction information that is generated by the apparatus based on the three-dimensional visual hull; and updating the background model based on previously-determined foreground region information and an illumination level change, and based on the background correction information received from the apparatus having the processor configured to generate the three-dimensional visual hull.