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Method and an apparatus for assessment of particle concentration

A particle concentration and weather technology, applied in the field of environmental analysis and processing, and remote sensing image processing, can solve problems that are not easy to adapt to small-scale regional analysis

Inactive Publication Date: 2017-01-04
HITACHI LTD
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Problems solved by technology

[0005] In order to solve the problem that the analysis of particle concentration based on remote sensing technology is not easy to adapt to smaller-scale regional analysis, the present invention provides a method for evaluating particle concentration, which includes the following steps:

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  • Method and an apparatus for assessment of particle concentration
  • Method and an apparatus for assessment of particle concentration

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Embodiment Construction

[0044] The present invention will be described in detail below in conjunction with the embodiments.

[0045] figure 1 is a flowchart of a method of assessing particulate matter concentration according to an embodiment of the present invention. In step S11, the satellite sensor is used to shoot the surface area at different times to obtain clear weather images and haze weather images of the surface area, and the respective pixel values ​​of multiple pixels in the surface area in the clear weather image Compose the clear weather image data, and the respective pixel values ​​of multiple pixels in the haze weather image form the haze weather image data. In this embodiment, the satellite sensor is MODIS with a resolution of 1 km. The size of the clear weather image and the foggy weather image are both 500×500 pixels. The surface area is located at 114.84° to 121.20° east longitude and 32.51° to 37.53° north latitude . The clear weather image was shot at 10:45 am on November 23, ...

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Abstract

The invention provides a method and an apparatus for assessment of particle concentration. The method comprises the following steps: a) shooting is carried out for earth surface area at different times, in order to obtain image data of sunny weather and image data of haze weather; b) colorful picture data of sunny weather and colorful picture data of haze weather are extracted from the image data of sunny weather and the image data of haze weather respectively; c) dark channel data of sunny weather and dark channel data of haze weather are respectively extracted from the image data of sunny weather and the image data of haze weather respectively; d) dark channel difference data is calculated, and guiding filtering data is obtained; e) the guiding filtering data is utilized, resampling is carried out for standard aerosol optical thickness, in order to obtain the resampled aerosol optical thickness of each pixel; f) a parametric inversion method is used, a quantitative inversion relation is determined, according to the quantitative inversion relation and the resampled aerosol optical thickness of each pixel, particle concentration of each pixel is obtained.

Description

technical field [0001] The invention relates to the technical field of remote sensing image processing, in particular to a method and device for evaluating particle concentration by using satellite images, which are suitable for the field of environmental analysis and processing. Background technique [0002] With the development of information technology, remote sensing technology is increasingly used to obtain and analyze various information. The use of remote sensing to monitor the concentration of particulate matter has become the focus of research. [0003] At present, the particle concentration monitoring technology mainly includes ground monitoring network monitoring and satellite remote sensing monitoring. Since satellite remote sensing images can monitor a larger continuous spatial range, the spectral resolution is getting higher and higher, and more and more information can be extracted, so the technical research of using satellite remote sensing to monitor the co...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/06
Inventor 张岱张学
Owner HITACHI LTD
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