City water extraction method based on panchromatic remote sensing image

A remote sensing image and water body extraction technology, applied in image enhancement, image analysis, image data processing, etc., can solve the problems of not considering texture features, few full-color remote sensing images, few extraction algorithms, etc., and achieve computational complexity Low cost, accurate extraction results, and simple calculation methods

Inactive Publication Date: 2014-04-30
HOHAI UNIV
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At present, commonly used water body extraction algorithms are based on multispectral remote sensing images such as SPOT and TM remote sensing images, using spectral transformation to generate various water body indices, and then extracting water bodies through supervised classification or threshold segmentation, but few are based on panchromatic remote sensing images and Algorithms for Water Body Extractio

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  • City water extraction method based on panchromatic remote sensing image
  • City water extraction method based on panchromatic remote sensing image
  • City water extraction method based on panchromatic remote sensing image

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[0044] The technical solutions of the present invention will be described in detail below, but the protection scope of the present invention is not limited to the embodiments.

[0045] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings.

[0046] A method for extracting urban water bodies based on panchromatic remote sensing images of the present invention comprises the following steps:

[0047] (1) Remote sensing image preprocessing: using median filtering to suppress noise in remote sensing images;

[0048](2) Optimal scale selection: In the image preprocessed in step (1), select the minimum scale, maximum scale, and scale change step, and calculate the global average variance in turn to obtain the optimal spatial scale;

[0049] (3) Univariate texture generation: According to the optimal spatial scale obtained in step (2), traverse each pixel in the remote sensing image, calculate the uniform varianc...

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Abstract

The invention discloses a city water extraction method based on a panchromatic remote sensing image. Water information of urban area needed to be extracted will be finally acquired through four procedures of remote sensing image preprocessing, the optimal scale selection, uniform texture generation, and the optical threshold segmentation. The city water extraction method based on a panchromatic remote sensing image is simple in calculating method, less in calculation, comparatively accurate in the final extracted results, and capable of being applied in several fields of urban planning, environmental sciences, geographic information mapping and the like.

Description

technical field [0001] The invention relates to an image information extraction method, in particular to an urban water body extraction method based on panchromatic remote sensing images. Background technique [0002] As an important spatial object and natural resource, urban water body plays an indispensable role in urban planning, environmental science and urban remote sensing mapping. In recent years, with the development of satellite remote sensing technology and the emergence of various space object extraction algorithms, water body extraction methods have been continuously improved and have been widely used in various researches. At present, commonly used water body extraction algorithms are based on multispectral remote sensing images such as SPOT and TM remote sensing images, using spectral transformation to generate various water body indices, and then extracting water bodies through supervised classification or threshold segmentation, but few are based on panchroma...

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IPC IPC(8): G06T5/00G06T7/00
Inventor 徐南马符讯马成严朝霞徐大钊贾涛李代云艾斯卡尔·阿不力米提黄卓
Owner HOHAI UNIV
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