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US 10,372,970 B2Granted
Automatic scene calibration method for video analytics
AssigneeQUALCOMM Incorporated
InventorsLei Wang, Dashan Gao, Lei Ma, Chinchuan Chiu
Life of this patent
Estimating the term…
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AssigneeQUALCOMM Incorporated
InventorsLei Wang, Dashan Gao, Lei Ma, Chinchuan Chiu
Estimating the term…
To determine real-world information about objects moving in a scene, the camera capturing the scene is typically calibrated to the scene. Automatic scene calibration can be accomplished using people that are found moving about in the scene. During a calibration period, a video content analysis system processing video frames from a camera can identify blobs that are associated with people. Using an estimated height of a typical person, the video content analysis system can use the location of the person's head and feet to determine a mapping between the person's location in the 2-D video frame and the person's location in the 3-D real world. This mapping can be used to determine a cost for estimated extrinsic parameters for the camera. Using a hierarchical global estimation mechanism, the video content analysis system can determine the estimated extrinsic parameters with the lowest cost.
A method for automated scene calibration, comprising:
An apparatus, comprising:
A non-transitory computer-readable medium having stored thereon instructions that, when executed by one or more processors, cause the one or more processors to:
Dependencies are inferred from the claim text.