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A method for video line detection

A video and target technology, applied in the direction of image data processing, instruments, calculations, etc., can solve the problems of false negatives, achieve good results and reduce the rate of false positives

Inactive Publication Date: 2017-02-08
TELEFRAME TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, there are situations where high and low contrasts exist at the same time, such as shadow areas and bright areas caused by outdoor light. In these cases, the traditional tracking-based line mixing detection method is likely to cause false positives

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  • A method for video line detection

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Embodiment Construction

[0014] Such as figure 1 As shown, the video line mixing detection method of the present invention includes the following steps:

[0015] (1) Target tracking: First generate the background, then generate the foreground target according to the background, then optimize the foreground target by using morphological operations, and then number the foreground connected targets. When there are connected targets in similar positions in several consecutive frames, a potential is generated target, predict and track to generate a trajectory;

[0016] (2) Weak contrast area extraction: divide the image into blocks, count the mean value of the background brightness, and count the difference between the minimum and maximum brightness values ​​between frames. If the two are less than a certain threshold, it is considered as a weak contrast block, and the weak contrast blocks are formed into a connected area. If it is greater than a certain threshold, the output is a weak contrast area;

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Abstract

The invention provides a video wire mixing detection method for reducing the underreporting rate of wire mixing detection under the condition of reduced contrast. The method comprises the following steps of: (1). object tracking, i.e., first of all generating backgrounds, generating foreground objects according to the backgrounds, optimizing the foreground objects by using morphological operation, numbering foreground communicated objects, and when the communicated objects appear at similar positions for several continuous frames, generating latent objects and performing predicting and tracking so as to generate a locus; (2). weak-contrast area extraction; (3). wire mixing area formation and wire mixing defining; and (4). locus distinguishing, i.e., if a length exceeds a certain threshold and the locus overlaps with a sending zone, outputting the locus as a wire mixing object. The video wire mixing detection method reduces the underreporting rate of wire mixing detection and has especially good effects for a weak-contrast area.

Description

technical field [0001] The invention relates to a line-mixing detection method, in particular to a video line-mixing detection method. Background technique [0002] In recent years, video surveillance technology has been more and more used in the security field. With the continuous growth of the amount of surveillance data, surveillance personnel need to spend a lot of time manually filtering the data and selecting useful video information from it. Repetitive work often overwhelms them. Surveillance personnel urgently need a product that is easier to work, easier to operate and manage to replace the original system. As a result, intelligent video technology came into being and entered people's lives. [0003] Intelligent video is the introduction of computer vision methods into intelligent monitoring. This technology includes automatic detection of moving or stationary targets, target classification and behavior understanding by video image sequences, the purpose is to es...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/20
Inventor 刘忠轩
Owner TELEFRAME TECH BEIJING