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System-and-method-for-multi-resolution-background-adaptation

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System and method for multi-resolution background adaptation

Details

Inventors: Khosravi, Mehdi; Moed, Michael C.; Crabtree, Ralph N.; Perez-Jacome, Jorge E.;
Assignee: NCR Corporation (Dayton, OH)
Primary Examiner: Le; Vu
Assistant Examiner:
Attorney, Agent or Firm: Needle & Rosenberg

A multi-resolution background adaptation system and method wherein image information for a video frame is analyzed to update a background image in as great a resolution as possible. The video frame is partitioned into a plurality of cell levels, each cell level comprising at least one cell. Each cell is further partitioned into children cells for several hierarchical levels. Background image adaptation begins at the frame level and proceeds to lower cell levels of smaller cells when the lower cell levels are not substantially occluded by objects.

DETAILED DESCRIPTION Briefly, the present invention is directed to a system and method for background adaptation of image information representing a scene or viewing area monitored by a video camera.
A region or portion of a video frame is selected for analysis.
The image information for smaller subregions within that region are analyzed to determine whether any subregion is substantially occluded by an object.
If a portion of the region (at least one of the subregions) is substantially occluded by an object, then the background image frame is updated for the region.
If none of the subregions is substantially occluded by an object, then each of the subregions is analyzed individually in the same manner.
This process is repeated recursively for smaller and smaller regions.
The objects and advantages of the present invention will become more readily apparent when reference is made to the following description taken in conjunction with the accompanying drawings.

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