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MODIS time sequence data synthesis method for extracting burn scar area and apparatus therefor

A technology of data synthesis and time series, applied in measurement devices, re-radiation of electromagnetic waves, utilization of re-radiation, etc., can solve problems such as the identification of fire trails affecting synthetic images, and achieve the effect of small data processing

Inactive Publication Date: 2009-05-06
INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
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Problems solved by technology

However, in the above synthesis methods, the NIR / Albedo minimum value synthesis method may choose the shadow of the cloud, and the surface temperature / brightness temperature maximum value synthesis method may be affected by factors such as Sunglit and high temperature bare land. Interference, which affects the quality of composite images and the identification of fire traces

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  • MODIS time sequence data synthesis method for extracting burn scar area and apparatus therefor
  • MODIS time sequence data synthesis method for extracting burn scar area and apparatus therefor
  • MODIS time sequence data synthesis method for extracting burn scar area and apparatus therefor

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Embodiment Construction

[0029] The MODIS time series data synthesis method 1 for extracting the area of ​​a fire site of the present invention includes: step S11 of receiving MODIS data, step S12 of preprocessing the data, and step S13 of identifying bad data; it also includes: a step of data synthesis S14, this step extracts the data of the i-th pixel from 1 to 12 days from the marked data, and then generates a synthesized image according to a prescribed synthesis method and outputs the synthesized image to the output image output device; step S15 of outputting the image.

[0030]The MODIS time series data synthesizing device 1 for extracting the area of ​​a fire site of the present invention includes: a device 11 for receiving MODIS data, a device 12 for preprocessing the data, a device 13 for identifying bad data, a device 15 for outputting an image, and it is characterized in that, It also includes a data synthesis device 14, which extracts the data of the i-th pixel from 1 to 12 days from the marked...

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Abstract

The invention relates to a MODIS time sequence data synthesis method for extracting the fire hazard earth area, which comprises: receiving MODIS data, data preprocessing, identifying the bad data, outputting the picture. It is characterized in that it also comprises: data synthesis step which extracts i element unit one to twelve days from the labeled data, then generates synthesis picture and outputs the picture to the output device by the special synthesis method. The data synthesis method uses the fifth wave section and the seventh wave section of the MODIS data to construct the fire hazard earth index GEMI-B, the expression formulas that GEMI-B=ªÃ(1-0.25ªÃ)-(ªÐ5-0.125) / (1-ªÐ5) (1) wherein ªÃú¢(2(ªÐ72-ªÐ52)ú½1.5ªÐ7ú½0.5ªÐ5) / (ªÐ7ú½ªÐ5ú½0.5) (2) ªÐ7 andªÐ5 are separately as the reflecting rate of MODIS fifth and seventh wave section.

Description

Technical field [0001] The invention relates to a method and a device for detecting grassland fire traces using MODIS (Moderate Resolution Imaging Spectrometer) data, in particular to a MODIS time series data synthesis method and a device suitable for extracting the area of ​​fire traces. Background technique [0002] The extraction of burn scar is an important method to estimate the loss of forest or grassland fire. At the same time, the area of ​​the fire scar is also to estimate the CO emitted by the fire. 2 , CO, CH 4 , NO x The main parameters needed when waiting for greenhouse gases. In view of the important role of fire sites in ecosystem management and global change research, the study of fire site identification and mapping has received more and more attention from the international remote sensing community. In the fire site identification using remote sensing data, many methods use low spatial resolution time series synthetic data (such as: SPOT / VGT, NOAA / AVHRR, Terra o...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/48G01S17/89
Inventor 陈晋陈仲新谭明艳王利民曹鑫
Owner INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
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