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Dual-mode masked man event automatic detection method based on video characteristic statistics

A video feature, automatic detection technology, applied in computer parts, character and pattern recognition, computing and other directions, can solve the problems of insufficient processing speed, inability to meet real-time monitoring, low recognition rate, etc., to achieve waste of human resources, high compatibility , the calculation method is simple

Active Publication Date: 2016-06-15
SOUTH CHINA UNIV OF TECH
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AI Technical Summary

Problems solved by technology

These intelligent video surveillance technologies are all developed for specific problems. There is no real-time identification technology for masked people in video surveillance, and these technologies often have insufficient processing speed and low recognition rate, which cannot meet the requirements of real-time monitoring.

Method used

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  • Dual-mode masked man event automatic detection method based on video characteristic statistics

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Embodiment Construction

[0038] The implementation of the present invention will be further described below in conjunction with the accompanying drawings, but the implementation of the present invention is not limited thereto. If there are any processes that are not specifically described in detail below, those skilled in the art can refer to the prior art.

[0039] Such as figure 1 , the main flow of the dual-mode masked person event automatic detection method based on video feature statistics includes the following steps:

[0040] (a) read in the video file, scale the video image, and convert it to a grayscale image;

[0041] (b) obtaining a moving object foreground image;

[0042] (c) Find the largest rectangular outline of the moving object by calculating the position of the coordinates of the midpoint of the outline and the overlap ratio with the moving foreground of the previous frame;

[0043] (d) Detecting the movement process obtained in step (c), obtaining the head position information for...

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Abstract

The invention provides a dual-mode masked man event automatic detection method based on video characteristic statistics. The dual-mode masked man event automatic detection method comprises the steps of: zooming a video frame and converting the video frame into a grayscale image after acquiring a source video image, acquiring a maximum object motion foreground rectangular frame, positioning a head region coarsely, acquiring face position information, then estimating a mouth region within the obtained face range, cutting the mouth region to narrow a range, calculating a gradient map, primarily judging whether a person is a masked man through calculating number of connected domains on the basis of the obtained gradient map, and calculating proportion of the areas of the top two connected domains for further judging whether the person is a masked man. The dual-mode masked man event automatic detection method based on video characteristic statistics does not have specific requirements for a video scene, is simple and efficient in the calculation method, can perform real-time processing, can be applied to real-time investigation and case solving, saves suspicious masked man information, and can provide first-hand information for evidence collection after a crime is committed.

Description

technical field [0001] The invention generally relates to the field of computer intelligent monitoring video processing, in particular to a dual-mode masked person event automatic detection method based on video feature statistics. Background technique [0002] Since the reform and opening up, driven by the rapid development of the national economy and the improvement of people's living standards, my country's security industry has flourished and gradually grown up. After more than 30 years of development, China's security industry has formed a huge industry with complete categories and advanced technologies. system, and has maintained a good momentum of rapid and healthy development. The use of safety protection is very extensive, and the demand is constantly expanding. No matter in large or collective places such as banks, enterprises, transportation, communities, military, or personal residences, the requirements for safety protection are increasing day by day. With the ra...

Claims

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Application Information

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IPC IPC(8): G06K9/00
CPCG06V40/172G06V20/42G06V20/46
Inventor 黄翰王琥梁椅辉郝志峰
Owner SOUTH CHINA UNIV OF TECH
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