Anomalous stationary object detection and reporting
First Claim
1. A computer-implemented method for analyzing a scene depicted in an input stream of video frames captured by a video camera, the method comprising:
- receiving, from the video camera, the input stream of video frames;
identifying an object depicted in the input stream of video frames received from the video camera;
determining, via one or more processors, whether the object has remained at the observed location in the scene for at least a threshold period;
determining whether the object has remained substantially stationary during the threshold period;
upon determining the object has remained substantially stationary and remained within the scene for at least the threshold period, determining a rareness score for the object, wherein the rareness score indicates a likelihood of the object being substantially stationary at the observed location, and wherein the rareness score is determined based at least on automatically learned stationary and non-stationary count maps indicating observed frequencies of stationary and non-stationary objects in regions of the scene, respectively, and wherein the rareness score has form
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Accused Products
Abstract
Techniques are disclosed for analyzing a scene depicted in an input stream of video frames captured by a video camera. The techniques include receiving data for an object within the scene and determining whether the object has remained substantially stationary within the scene for at least a threshold period. If the object is determined to have remained stationary for at least the threshold period, a rareness score is calculated for the object to indicate a likelihood of the object being stationary to an observed degree at an observed location. The rareness score may use a learning model to take into account previous stationary and/or non-stationary behavior of objects within the scene. In general, the learning model may be updated based on observed stationary and/or non-stationary behaviors of the objects. If the rareness score meets reporting conditions, the stationary object event may be reported.
55 Citations
17 Claims
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1. A computer-implemented method for analyzing a scene depicted in an input stream of video frames captured by a video camera, the method comprising:
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receiving, from the video camera, the input stream of video frames; identifying an object depicted in the input stream of video frames received from the video camera; determining, via one or more processors, whether the object has remained at the observed location in the scene for at least a threshold period; determining whether the object has remained substantially stationary during the threshold period; upon determining the object has remained substantially stationary and remained within the scene for at least the threshold period, determining a rareness score for the object, wherein the rareness score indicates a likelihood of the object being substantially stationary at the observed location, and wherein the rareness score is determined based at least on automatically learned stationary and non-stationary count maps indicating observed frequencies of stationary and non-stationary objects in regions of the scene, respectively, and wherein the rareness score has form - View Dependent Claims (2, 3, 4, 5, 6)
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7. A non-transitory computer-readable storage medium storing instructions, which when executed by a computer system, perform operations for analyzing a scene depicted in an input stream of video frames captured by a video camera, the operations comprising:
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receiving, from the video camera, the input stream of video frames; identifying an object depicted in the input stream of video frames received from the video camera; determining, via one or more processors, whether the object has remained at the observed location in the scene for at least a threshold period; determining whether the object has remained substantially stationary during the threshold period; upon determining the object has remained substantially stationary and remained within the scene for at least the threshold period, determining a rareness score for the object, wherein the rareness score indicates a likelihood of the object being substantially stationary at the observed location, wherein the rareness score is determined based at least on automatically learned stationary and non-stationary count maps indicating observed frequencies of stationary and non-stationary objects in regions of the scene, respectively, and wherein the rareness score has form - View Dependent Claims (8, 9, 10, 11, 12)
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13. A system, comprising:
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a video camera; a processor; and a memory, wherein the memory includes an application program configured to perform operations for analyzing a scene depicted in an input stream of video frames captured by the video camera, the operations comprising; receiving, from the video camera, the input stream of video frames, identifying an object depicted in the input stream of video frames received from the video camera, determining, via the application execution the processor, whether the object has remained at the observed location in the scene for at least a threshold period, determining whether the object has remained substantially stationary during the threshold period, upon determining the object has remained substantially stationary and remained within the scene for at least the threshold period, determining a rareness score for the object, wherein the rareness score indicates a likelihood of the object being substantially stationary at the observed location, wherein the rareness score is determined based at least on automatically learned stationary and non-stationary count maps indicating observed frequencies of stationary and non-stationary objects in regions of the scene, respectively, and wherein the rareness score has form - View Dependent Claims (14, 15, 16, 17)
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Specification