Well lid theft detection method

A detection method and manhole cover technology, applied in the fields of instruments, character and pattern recognition, computer parts, etc., can solve the problems of lost manhole covers, hidden dangers of pedestrians and vehicles, large manpower and financial resources, etc., and achieve the effect of improving speed and accuracy.

Inactive Publication Date: 2017-02-22
CHENGDU TOPPLUSVISION TECH CO LTD
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Problems solved by technology

However, the problem of manhole cover loss has not been effectively solved, which will cause great safety hazards to pedestrians and vehicles
Although the above two methods can imp

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  • Well lid theft detection method

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Embodiment Construction

[0034] The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings, so as to make the technical solution of the present invention easier to understand and grasp.

[0035] refer to figure 1 As shown, a manhole cover theft detection method,

[0036] Step 1: Obtain a video sequence image including manhole cover from the monitoring equipment; apply Gaussian filtering to the collected video sequence image. Video acquisition is to collect video images in real time by the camera, and transmit the video sequence images to the terminal manhole cover detection module. Image preprocessing, because the surveillance video environment is complex and changeable, there is a lot of interference noise, and the device itself may also bring noise to the image, so first of all, Gaussian filtering should be used on the image to remove noise interference.

[0037] Step 2, determine an ellipse coincident with the edge of...

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Abstract

The invention discloses a well lid theft detection method. The method comprises the steps of obtaining a video sequence image containing a well lid from a monitoring device; determining an ellipse coinciding with the edge of the well lid through an image processing algorithm; performing calculation according to features in an ellipse range of the video sequence image to obtain a reference feature value; obtaining the video sequence image from the monitoring device at an interval of first preset time, and performing calculation according to the features in the ellipse range of the video sequence image to obtain a comparison feature value; performing comparison to obtain a difference value between the comparison feature value and the reference feature value, if the difference value is greater than a reference error value, adding 1 to an accumulator, and if the difference value is smaller than the reference error value, resetting the accumulator; and if a count of the accumulator exceeds a reference threshold, outputting a theft signal. According to the method, a detection algorithm provided by the invention still can perform effective identification and locating on a deformed well lid image, the detection speed and accuracy is increased and improved, the calculation complexity is lowered, and a calculation mechanism of the accumulator can effectively avoid a false detection phenomenon.

Description

technical field [0001] The invention relates to a method for detecting manhole cover theft. Background technique [0002] Manhole cover facilities are important assets of urban construction and are of great significance to urban management. However, the problem of manhole cover loss has not been effectively solved, which will cause great safety hazards to pedestrians and vehicles. Therefore, it is of great significance to study a technology that can monitor the state of the manhole cover in real time and give an alarm when the manhole cover is lost. [0003] There are two traditional solutions to this problem. One is to make the manhole cover anti-theft by improving the manufacturing process of the manhole cover, which is not conducive to theft, or directly weld the manhole cover to the road surface. The other is to add an alarm sensor device on the manhole cover. When it detects that the manhole cover has been opened illegally, the device will transmit the alarm signal to...

Claims

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Application Information

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IPC IPC(8): G06K9/00G06K9/32
CPCG06V20/44G06V20/41G06V10/245
Inventor 邹泽东龙学军韩明燕毛河周剑
Owner CHENGDU TOPPLUSVISION TECH CO LTD
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