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A gas detection method based on hyperspectral infrared image processing

An infrared image processing and gas detection technology, which is applied in the field of infrared detection technology and image processing, can solve problems such as the lack of hyperspectral infrared image processing technology, achieve the effects of reducing spectral noise and image noise, improving measurement accuracy, and improving recognition accuracy

Active Publication Date: 2018-11-09
HUBEI JIUZHIYANG INFRARED SYST CO LTD
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Problems solved by technology

At present, there are many hyperspectral / hyperspectral image processing technologies, but hyperspectral infrared image processing technologies for gas detection are relatively lacking

Method used

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  • A gas detection method based on hyperspectral infrared image processing
  • A gas detection method based on hyperspectral infrared image processing
  • A gas detection method based on hyperspectral infrared image processing

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Embodiment Construction

[0034] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0035] figure 1 Shown is the functional block diagram of the gas detection method of the present invention, and the realization of gas detection mainly includes the following steps:

[0036] a), using a hyperspectral infrared imaging system to collect infrared spectral data of the target area;

[0037] b), using a nonlinear filter to reduce infrared spectral data noise and image noise in each band; wherein the nonlinear filtering formula is:

[0038]

[0039] In the above formula, i represents the coordinates (X, Y, Z) in the data cube, where X and Y represent the abscissa and ordinate of the airspace respectively, and Z represents the spectral dimension coordinate; N(i) represents the neighborhood of i, Indicates the gray value of i; weight coefficient reacted to y i and y j The degree of similarity between them can be calculated by the following f...

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Abstract

The invention discloses a gas detection method based on hyperspectral infrared image processing. The gas detection method based on the hyperspectral infrared image processing comprises the following steps of (a), collecting the infrared spectral data of a target area by adopting a hyperspectral infrared imaging system; (b), reducing the noise of the infrared spectral data and image noise of each wave band by utilizing a nonlinear wave filter; (c), calculating the infrared absorption spectral curve of a gas by adopting a gas spectral inversion algorithm; (d), carrying out normalization on the spectral data processed in step (b) and special data obtained through calculation in step (c), so as to reduce the influence of a direct component in a spectral line, and afterwards, judging the type and the concentration of the gas by adopting a feature weighting based generalized angular similarity measuring method. According to the gas detection method based on the hyperspectral infrared image processing, the noise of the infrared spectral data and the image noise of each wave band are reduced by utilizing the nonlinear wave filter; afterwards, the noise reduction, the dimensionality reduction and the spectral inversion operation are carried out on a collected hyperspectral image; the processed hyperspectral image is compared with data in a gas infrared absorption spectrum library; thus, the type of the gas can be identified and the concentration of the gas can be estimated.

Description

technical field [0001] The invention belongs to the field of infrared detection technology and image processing technology, and relates to a gas detection method based on hyperspectral infrared image processing. Background technique [0002] With the rapid development of my country's economy, the problems of air pollution and greenhouse gas emissions have become more and more prominent. In order to grasp how pollution occurs, it is necessary to obtain correct pollution gas information. Pollution reduction measures can only be taken if we have accurate information on the extent of air pollution, its sources and their locations. [0003] In recent years, infrared detection technology and hyperspectral imaging technology have developed rapidly, and the use of hyperspectral infrared imaging technology provides the possibility for online monitoring of gas pollutants. Compared with the traditional apex sampling method, this technology has great advantages: a) real-time monitorin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/3504
CPCG01N21/3504
Inventor 岳松张智杰赵坤王晨晟余徽贾国伟
Owner HUBEI JIUZHIYANG INFRARED SYST CO LTD
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