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Method for property protection based on video image local feature matching

A local feature, video image technology, applied in image analysis, image data processing, computer parts and other directions, can solve problems such as loss, inaccessibility, inability to distinguish property, etc.

Active Publication Date: 2015-01-21
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of matching method using global features often cannot achieve good results when partial occlusion and light changes, that is, when the matching is unsuccessful, it is impossible to distinguish whether the property is occluded, or the matching failed due to light changes, or it is true. lost

Method used

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  • Method for property protection based on video image local feature matching
  • Method for property protection based on video image local feature matching
  • Method for property protection based on video image local feature matching

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Embodiment Construction

[0046] 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.

[0047] Such as figure 1 , 2 , a property protection method based on local feature matching of video images, comprising steps in the following order:

[0048] S1. Obtain the video frame containing the protected object from the security camera;

[0049] S2. Setting the region of interest ROI, which contains the protection object;

[0050] S3. Extract the number of FAST corner points and the coordinate information of each corner point in the ROI region in the initial frame, and save it as X0; the extraction method is as follows:

[0051]A. Calculate the FAST corner points in the ROI area:

[0052] N = Σ x ∀ ( circle ( ...

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Abstract

The invention discloses a method for property protection based on video image local feature matching, which comprises the sequential steps of acquiring video frames of a protected object by a security camera; setting a region of interest ROI in which the protected object is contained; extracting the number of FAST corners and coordinate information of each corner of the ROI in an initial frame, and storing the number of FAST corners and the coordinate information of each corner as X0; extracting the number of FAST corners and coordinate information of each corner of the ROI in the current frame, and storing the number of FAST corners and the coordinate information of each corner as X1; calculating a matching ratio k of the X0 and the X1, and making an alarm decision through comparing the k with a matching ratio threshold lambda and comparing the duration time t with a time threshold T. When the matching ratio k is less than the matching ratio threshold lambda and the duration time t is greater than the time threshold T, an alarm is triggered; and otherwise, the alarm is not triggered. The method disclosed by the invention well solves key problems that variations in light intensity exist under a complex background, partial and complete shielding occurs, the object is similar to the background in color, the object is small, and the like, and effective protection for properties is realized.

Description

technical field [0001] The invention relates to the field of video image processing, in particular to a property protection method based on local feature matching of video images. Background technique [0002] At present, there are relatively mature solutions for commercial property insurance systems implemented using Internet of Things technology. This type of method mainly uses Internet of Things professional technologies such as radio frequency technology, wireless sensor technology, wireless communication technology, and digital radio frequency technology to realize the protection of specific property. effective protection. Although the effect of this commercial system is good, it needs to set up special sensors for each protected item, arrange hardware such as wireless transmission and alarm equipment, so the investment cost is relatively large, and it is not necessary to protect some public facilities in many public places. Be applicable. [0003] Video surveillance ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/46G06T7/00
CPCG06V20/46G06V10/758G06V2201/07
Inventor 李远清何盛鸿赵连超叶立仁
Owner SOUTH CHINA UNIV OF TECH
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