Method for property protection based on video image background matching

A background matching and video image technology, which is applied in the field of property protection based on video image background matching, can solve problems such as unsatisfactory results and false alarms of objects, and achieve the effects of reducing public property theft, low cost, and high accuracy

Active Publication Date: 2015-01-21
SOUTH CHINA UNIV OF TECH
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  • Summary
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AI Technical Summary

Problems solved by technology

The property protection method of this mode has the following deficiencies: (1) When the characteristics of the protected object are not obvious, or when the characteristics are too common, satisfactory results cannot be achieved; (2) When there are changes in light in the environment, or the protected object will be destroyed Frequent false positives when occluded

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  • Method for property protection based on video image background matching
  • Method for property protection based on video image background matching
  • Method for property protection based on video image background matching

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Embodiment Construction

[0037] The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0038] Such as figure 1 , 2 , a property protection method based on video image background matching, comprising steps in the following order:

[0039] S1. The video frame containing the protected object is obtained by the security camera;

[0040] S2. After initializing the initial video frame image, divide the video frame image into a foreground area, a background area and a reference area, and extract the feature vector F of the background area and the reference area respectively bk , F ct ;

[0041] The initialization is to filter the video frame image by a Gaussian function;

[0042] The eigenvector F bk and F ct Specifically, it is obtained through the following steps:

[0043] (1) For the video frame image, three regions of interest ROI are set, which are r...

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Abstract

The invention discloses a method for property protection based on video image background matching, which comprises the steps of acquiring video frames containing a protected object; initializing an initial video frame image, dividing the initial video frame image into a foreground region, a background region and a reference region, and extracting feature vectors Fbk and Fct of the background region and the reference region; calculating a matching ratio threshold T* of the extracting feature vectors Fbk and Fct so as to act as a reference threshold for final decision making; receiving and initializing a next frame image, extracting a feature vector Ffg of a foreground region of the next frame image, and calculating the matching ratio lambda of the feature vector Ffg and the feature vector Fbk; and making an alarm decision according to the matching ratio lambda and the matching ratio threshold T*. When the matching ratio lambda is greater than the matching ratio threshold T*, features of the foreground region are matched with features of the background region, the protected object is lost; and otherwise, the protected object is not lost. According to the method disclosed by the invention, a new idea of foreground-background matching is used, effective protection for properties in a complex environment is realized, and complete shielding and loss can be distinguished.

Description

technical field [0001] The invention relates to the field of image and video processing, in particular to a property protection method based on video image background matching. Background technique [0002] At present, there are already commercial property protection technologies and products using sensor technology, but they are not widely used in daily life due to their complicated layout, limited application occasions, and high cost. [0003] On the other hand, surveillance cameras are seen everywhere in our daily life, and most of the current surveillance cameras are only used for manual monitoring or saving data for consultation when necessary. On the one hand, resources are not fully utilized, and on the other hand, it takes a lot of manpower and material resources to search for relevant information from huge video data. [0004] Some existing methods of using video images to realize property protection are all based on the "foreground-foreground" matching mode, that ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
CPCG06V20/41G06V10/758G06V2201/07
Inventor 李远清何盛鸿叶立仁赵连超
Owner SOUTH CHINA UNIV OF TECH
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