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Multi-characteristic synthetic recognition method for outdoor early fire disaster

A recognition method and fire technology, applied in character and pattern recognition, fire alarms and instruments that rely on radiation, can solve problems such as fire spread, reduce the rate of false alarms and false alarms, and overcome interference. Effect

Inactive Publication Date: 2008-12-03
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

If a fire breaks out in these places and cannot be detected in time, once the fire spreads, it will cause unimaginable consequences

Method used

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  • Multi-characteristic synthetic recognition method for outdoor early fire disaster
  • Multi-characteristic synthetic recognition method for outdoor early fire disaster
  • Multi-characteristic synthetic recognition method for outdoor early fire disaster

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Embodiment Construction

[0025] The fire identification method of the present invention is as shown in Figure 1, at first, obtains the infrared image of higher resolution by thermal imager, then, the infrared image is processed and identified, concrete steps are as follows:

[0026] 1. Gray-scale processing and threshold segmentation of fire infrared images: the main function of this part is to segment and extract images of suspected fire parts. In order to reduce the calculation amount of image processing, the infrared image is grayed first. Since the red component of the flame infrared image is very prominent, basically 255 or slightly lower, in order to facilitate the detection of the flame, the image is grayscaled based on the red component. That is, Gray(x,y)=R(x,y). where R(x, y) represents the red component value of the image. Gray value represented by Gray(x, y). A threshold of 200 is set, the image is binarized and the threshold is segmented, and all pixels with a gray value greater than 2...

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Abstract

The invention relates to a method for the comprehensive recognition of various features of outdoor incipient fire, pertaining to the technical field of fire monitoring and image processing. The method comprises the steps that: 1. an infrared image is obtained by a thermal imaging instrument; 2. grey scale processing, threshold segmentation and filtration processing are carried out to the fire infrared image; 3.further analysis is carried out to a suspected fire flame image to obtain the following five criterions: (1) the flame image color distribution criterion; (2) the flame image change rate criterion; (3) the flame image area extending and increasing criterion; (4) the flame image circularity criterion; (5) the flame image shape changing criterion; 4. judgment is comprehensively carried out by utilizing a neural network and taking the criterions of 1 to 5 as input so as to obtain the final result that whether the fire occurs. The method overcomes interference to aspects such as natural lights, etc. in the fire recognition process, and reduces the rate of missing report and the rate of false report of the fire.

Description

technical field [0001] The invention belongs to the technical field of fire monitoring and image recognition and processing, and mainly relates to a method for identifying early indoor and outdoor fires according to various characteristics of flames by using thermal imaging technology to obtain infrared monitoring images. Background technique [0002] Fire is one of the most common serious disasters in human society. According to the fire statistics of the United States, Japan and the European Union in recent years, the direct economic loss of fire in developed countries accounts for 0.2% to 0.3% of the gross national product. The fire fatality rate is 0.0016% in the US, 0.0013% in the EU and 0.0012% in Japan. These include many major fires, such as the fire caused by the Great Hanshin Earthquake in Japan in 1995, which killed more than 5,200 people. In 1997, a fire broke out in the holy city of Mecca in Saudi Arabia during Ramadan, killing more than 1,000 people. In June ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G08B17/12
Inventor 姚敏赵敏
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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