Fire point detection method

A detection method and fire point technology, applied in the field of remote sensing, can solve problems such as unfavorable small fire fire point detection, and achieve the effects of improving dynamic monitoring capabilities, ensuring space applicability, and reducing false alarms.

Inactive Publication Date: 2017-05-10
INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI +1
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Such resolution is not conducive to t

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[0044] In order to make the objectives, technical solutions, and advantages of the present application clearer, the technical solutions of the present application will be described clearly and completely in conjunction with specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of this application.

[0045] In order to clearly express the meaning of each parameter in this application document, for some parameters that appear multiple times in the text, the symbols and meanings of the listed parameters are shown in Table 1:

[0046] Table 1. Parameter symbol and meaning comparison table

[0047] Parameter symbol Meaning

[0048] ρ 1 Channel I1 reflectivity data;...

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Abstract

The invention discloses a fire point detection method. The method realizes fire point detection based on VIIRS 375m data by using spatial information and spectral information of the VIIRS 375m data. The method comprises the following steps: acquiring data of I1-I5 bands of an NPP satellite VIIRS sensor, wherein data of I1-I3 band is pixel reflectivity data, and data of I4 and I5 bands is pixel brightness and temperature data; determining absolute fire point pixels according to the brightness and temperature; determining potential fire point pixels according to the brightness and temperature difference of the adjacent bands; selecting candidate fire point pixels from the potential fire point pixels by using a sampling window analysis method; selecting nominal confidence fire point pixels from the candidate fire point pixels by using a context analysis method; and selecting a low confidence fire point pixel and a high confidence fire point pixel from the absolute fire point pixels by using a minimum sampling window analysis method. The method makes up the shortages of AVHRR and MODIS data on the aspect of spatial resolution, improves the detection capability on smaller fire points, and simultaneously improves the dynamic monitoring capability on large fire.

Description

technical field [0001] The invention relates to the technical field of remote sensing, in particular to a fire detection method using satellite data. Background technique [0002] Satellite remote sensing has the characteristics of high time and space resolution and wide coverage. It can continuously track and monitor the dynamic process of fire development, and can provide detailed fire location, fire area, temperature changes and other information. In terms of remote sensing information sources, very high resolution radiometer (AVHRR) and moderate resolution imaging spectroradiometer (MODIS) data are widely used at home and abroad, but the main channel AVHRR-3(3.55 ~3.93 microns) and AVHRR-4 (10.5-11.3 microns) have a spatial resolution of 1.1 km; the main bands 4 microns and 11 microns used by MODIS for fire monitoring have a spatial resolution of 1 km. Such a resolution is not conducive to the detection of fire points of small fires. [0003] The VIIRS sensor is carrie...

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Application Information

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IPC IPC(8): G01V8/10G01V13/00G08B17/12G08B29/18
CPCG01V8/10G01V13/00G08B17/12G08B29/185
Inventor 程良晓范萌陈良富江涛李莘莘陶金花张莹李小英
Owner INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI
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