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Method and device for extracting urban heat island range

A technology of urban heat island and extraction method, which is applied in the field of remote sensing information extraction, can solve the problems of pixel fragmentation and neglect of spatial information, etc., and achieve the effect of rapid and complete extraction

Active Publication Date: 2018-07-27
GUANGZHOU UNIVERSITY
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  • Application Information

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Problems solved by technology

However, this pixel-based division method will produce a "salt and pepper effect" similar to the pixel-based classification method, and each pixel will be fragmented, ignoring the rich spatial information in the urban surface temperature distribution map

Method used

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  • Method and device for extracting urban heat island range
  • Method and device for extracting urban heat island range
  • Method and device for extracting urban heat island range

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no. 1 example

[0054] see figure 1 , figure 1 It is a schematic flowchart of a method for extracting urban heat island range provided by the first embodiment of the present invention.

[0055] The extraction method of described urban heat island scope, comprises the steps:

[0056] S101. Obtain a thermal infrared image corresponding to the research city, and perform surface temperature inversion on the thermal infrared image using a single-window algorithm to obtain a surface temperature and generate a surface temperature image.

[0057] In this embodiment, the extraction method of the urban heat island range based on the preset surface temperature inversion unit, surface temperature image segmentation unit, aggregation feature calculation unit and heat island area extraction unit can quickly and effectively extract the urban heat island range, Extract scientific basis for basic research on urban heat island, as well as government environmental management and planning decision-making depar...

no. 2 example

[0098] see Figure 5 , Figure 5 It is a schematic structural diagram of an extraction device for urban heat island range provided by the second embodiment of the present invention.

[0099] The extraction device within the scope of the urban heat island includes:

[0100] The surface temperature inversion unit 201 is used to obtain thermal infrared images corresponding to the research city, and perform surface temperature inversion on the thermal infrared images using a single-window algorithm to obtain the surface temperature and generate a surface temperature image.

[0101] In this embodiment, the extraction method of the urban heat island range based on the preset surface temperature inversion unit, surface temperature image segmentation unit, aggregation feature calculation unit and heat island area extraction unit can quickly and effectively extract the urban heat island range, Extract scientific basis for basic research on urban heat island, as well as government env...

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Abstract

The invention discloses a method and a device for extracting an urban heat island range. The method comprises the steps of acquiring a thermal infrared image corresponding to a research urban, and performing a surface temperature inversion of the thermal infrared image by using a single window algorithm to obtain surface temperature and generate a surface temperature image; dividing the surface temperature image into segmentation units according to the surface temperature, shape, and texture of the surface temperature image, and calculating average surface temperature inside the segmentation units; according to the average surface temperature, and calculating surface temperature aggregation features of the segmentation units by using a local autocorrelation algorithm; according to the surface temperature aggregation features, performing clustering classification on the segmentation units, and extracting size and boundary information of a research city heat island. The method can achieve fast and complete extraction of urban heat island range information based on the thermal infrared remote sensing image.

Description

technical field [0001] The invention relates to the technical field of remote sensing information extraction, in particular to a method and device for extracting urban heat island range. Background technique [0002] Urban heat island is an environmental problem brought about by the rapid expansion of urban construction land and social and economic development, and grasping the scope of urban heat island is an important basis for understanding urban environmental problems and formulating corresponding strategies for urban heat island governance. With the development of remote sensing technology and the wide application of remote sensing images, remote sensing images with thermal infrared channels have gradually become an important data source for urban heat island research. Using remote sensing images to quickly and efficiently obtain urban regional heat island information is an important topic of current research. [0003] Due to the complex landscape pattern and socio-econ...

Claims

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Application Information

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IPC IPC(8): G01J5/00
CPCG01J5/0066G01J5/485Y02A30/60
Inventor 郭冠华吴志峰陈颖彪
Owner GUANGZHOU UNIVERSITY
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