A method and device for urban sprawl detection based on heterogeneous luminous remote sensing images

A technology of urban expansion and remote sensing imagery, applied in the directions of instrument, calculation, character and pattern recognition, etc., can solve the problems of difficult urban expansion, and achieve the effect of high efficiency and accuracy

Active Publication Date: 2022-04-01
WUHAN UNIV
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Problems solved by technology

However, limited by the uncertain data revisit cycle, the amount of data on a global scale, especially in developing countries with rapid urbanization, is relatively small, and it is also difficult to construct a time series to analyze urban sprawl

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  • A method and device for urban sprawl detection based on heterogeneous luminous remote sensing images
  • A method and device for urban sprawl detection based on heterogeneous luminous remote sensing images
  • A method and device for urban sprawl detection based on heterogeneous luminous remote sensing images

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Embodiment Construction

[0025] The present invention will be further described in detail with reference to the accompanying drawings and examples.

[0026] see figure 1 , the embodiment of the present invention proposes a method for detecting urban sprawl based on heterogeneous luminous remote sensing images, including the following steps:

[0027] 1. Input the images covering the research area, including obtaining the LJ1-01 night light image of the research area, the ISS night light image and the land cover data of the corresponding year;

[0028] In this example, Wuhan City, Hubei Province is taken as the research area to detect its urban expansion from 2010 to 2018. ISS night light images covering Wuhan area in 2010 and LJ1-01 night light images covering Wuhan area in 2018 were collected, as well as land cover data in 2010 and 2018. Data collection may be performed in advance during specific implementation.

[0029] 2. Image preprocessing, including geometric correction and reprojection of ima...

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Abstract

The present invention provides a method and device for detecting urban sprawl based on heterogeneous luminous remote sensing images, including inputting LJ1‑01 nighttime light images of the research area, ISS nighttime light images and land cover data of corresponding years; preprocessing the image data, The preprocessing includes geometric correction and reprojection; building a relative radiometric calibration model and iteratively solving it to simulate an ISS image with similar characteristics to the LJ1-01 image; constructing a feature space combination and performing regional classification. The relative radiation calibration model and calculation method between heterogeneous night light remote sensing images proposed by the invention can solve the problem of shortage of night light data with a resolution of 100m. The present invention adopts the data before and after the change and the ratio of the two to construct a feature combination for classification, and can automatically classify urban expansion areas more accurately, and the efficiency and accuracy are much higher than manual methods.

Description

technical field [0001] The invention belongs to the application of luminous remote sensing in the field of urban development, and proposes a brand-new urban expansion detection method and device based on heterogeneous luminous remote sensing images. Background technique [0002] Although urban areas occupy only a small portion of the Earth's surface, their impact on the surrounding environment is significant. Economic development and population growth have brought about the acceleration of China's urbanization process. This phenomenon has brought some positive effects, such as the improvement of people's living standards, the upgrading of industrial structure, and the improvement of production efficiency, etc., but at the same time, some negative effects such as traffic congestion, farmland degradation, and urban heat island effect have also followed. . Therefore, a reasonable urban development plan can make the city develop healthily, and a timely and accurate grasp of th...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06V10/774G06V10/764G06V20/10G06K9/62
CPCG06V20/176G06F18/2411G06F18/214
Inventor 李熙尹子民宋杨李长辉
Owner WUHAN UNIV
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