Method for multi-temporal infrared radiation normalization of VIRR sensor for hot spot determination of forest fire

A technology of infrared radiation and sensors, applied in the field of forest fire monitoring, to achieve the effect of reducing the difference of infrared radiation

Active Publication Date: 2018-12-21
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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Problems solved by technology

Although there are some methods that can achieve better results, there are still many shortcomings. Therefore, a method that can further improve the radiation normalization effect is needed

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  • Method for multi-temporal infrared radiation normalization of VIRR sensor for hot spot determination of forest fire
  • Method for multi-temporal infrared radiation normalization of VIRR sensor for hot spot determination of forest fire
  • Method for multi-temporal infrared radiation normalization of VIRR sensor for hot spot determination of forest fire

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Embodiment Construction

[0022] When using remote sensing to monitor forest fire hotspots, the AVHRR sensor has high spatial resolution and wide coverage. When receiving forest fire hotspot energy, channel 3 has sensitive characteristics and can quickly monitor forest fire hotspots. However, when the saturation temperature is low, The 3 channels are easy to be saturated and cause false forest fire hotspots, and it is difficult to judge again in terms of time. However, MODIS has high temporal and spatial resolution and spectral resolution, which can make up for the defects of the AVHRR sensor itself, and combine the VIRR meteorological satellite data to establish a unified fire point judgment benchmark, which can improve the identification accuracy of forest fire hot spots. Therefore, it is necessary to construct a radiation normalization model, which is mainly divided into two parts: multi-temporal infrared radiation normalization and infrared radiation normalization of different sensors. In the norma...

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Abstract

The invention relates to a method for multi-temporal infrared radiation normalization of a VIRR sensor for hot spot determination of a forest fire. The method comprises: removing a cloud affecting pixel; calculating an NDVI value and extracting a vegetation area; carrying out radiation calibration on VIRR sensor infrared data; and selecting reference infrared image data and carrying out curve fitting on the reference infrared image data and to-be-normalized infrared image data to obtain an infrared radiation normalization parameter, determining an infrared radiation normalization model, and forming a new infrared radiation normalized image map. The sensor data are VIRR sensor infrared image data. The multi-temporal infrared radiation normalization includes infrared radiation normalizationbased on the VIRR sensor and infrared band characteristics of the VIRR sensor; and the brightness temperature value of the VIRR is used as normalized data. With the normalization method, the influenceof the radiation difference can be well eliminated; the time difference of the satellite sensor can be compensated; and the accuracy of the VIRR sensor infrared radiation on the ground object changemonitoring can be improved.

Description

technical field [0001] The invention relates to the technical field of forest fire monitoring, in particular to a multi-temporal infrared radiation normalization method of a VIRR sensor applied to forest fire hotspot discrimination. Background technique [0002] Remote sensing earth observation has a history of several decades. Due to the different sensors used by spaceborne or airborne platforms, the image data obtained have different geometric, radiation and image characteristics. Existing remote sensing satellites are widely used in various applications such as meteorology, resources, ocean, and environmental disaster reduction, and have achieved industrial development in related fields. At the same time, they have accumulated remote sensing data for many years, recording changes in the earth's surface and the atmosphere. Making full use of these precious historical resources is of great historical significance for global climate research, economic and social development,...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J5/00H04N5/33
CPCG01J5/007G01J2005/0077H04N5/33
Inventor 张娟张贵王赛专谭三清
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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