Method and system to characterize video background changes as abandoned or removed objects
First Claim
Patent Images
1. A method for analyzing video data in a security system, the method comprising:
- comparing a background model to video data to identify at least one patch of changed pixels between the background model and the video data;
generating masks based on the at least one patch of changed pixels that define contours around the at least one patch of changed pixels; and
applying the masks to the background model and the video data to determine whether the at least one patch of changed pixels is characteristic of an abandoned object or a removed object.
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Abstract
A method and system for analyzing video data in a security system. An analysis compares a current frame to a background model. The analysis system compares the background model to the current frame to identify changed pixel patches. The analysis system uses morphological image processing to generate masks based on the changed pixel patches. Next, the analysis system applies the masks to the background model and the current frames to determine whether the changed pixel patches are characteristic of abandoned or removed objects within the video data.
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Citations
20 Claims
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1. A method for analyzing video data in a security system, the method comprising:
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comparing a background model to video data to identify at least one patch of changed pixels between the background model and the video data; generating masks based on the at least one patch of changed pixels that define contours around the at least one patch of changed pixels; and applying the masks to the background model and the video data to determine whether the at least one patch of changed pixels is characteristic of an abandoned object or a removed object. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for analyzing video data in a security system, the method comprising:
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comparing a background model to the video data to identify at least one patch of changed pixels between the background model and the video data; summing gradient magnitudes for edge pixels in the background model with respect to the at least one patch of changed pixels; summing gradient magnitudes for edge pixels in the video data with respect to the at least one patch of changed pixels; and characterizing objects in the video data as abandoned or removed based on a comparison of the sums of gradient magnitudes between the background model and the video data. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A security system comprising:
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video cameras to capture video data; a video recorder to store the captured video data; an analysis system that analyzes the video data of the security system; and wherein the analysis system compares a background model to the video data to identify at least one patch of changed pixels between the background model and the video data, generates masks based on the at least one patch of changed pixels, which define contours around the at least one patch of changed pixels, applies the masks to the background model and the video data, and determines whether the at least one patch of changed pixels is characteristic of abandoned objects or removed objects.
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Specification