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SPOT5 image-based automatic water body extraction method

An automatic extraction and water body technology, which is used in the re-radiation of electromagnetic waves, special data processing applications, and utilization of re-radiation. requirements and other issues to achieve high extraction accuracy and eliminate terrain shadows.

Inactive Publication Date: 2013-10-23
LANZHOU JIAOTONG UNIV
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Problems solved by technology

[0005] As far as the water body extraction algorithm is concerned, the extraction accuracy of the existing algorithm is not high, and there are many wrong and missing information
This obviously cannot meet the requirements for high-precision water body extraction

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  • SPOT5 image-based automatic water body extraction method
  • SPOT5 image-based automatic water body extraction method
  • SPOT5 image-based automatic water body extraction method

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Embodiment Construction

[0047] In order to describe the technical content, structural features, achieved goals and effects of the present invention in detail, the following will be described in detail in conjunction with specific embodiments and accompanying drawings.

[0048] The present invention has high accuracy and universality, and can be applied to rivers with relatively small water bodies. Due to the influence of terrain, some river sections are in a discontinuous state on the SPOT5 image; it can be applied to relatively wide main rivers , but small reservoirs and areas with many ponds; it can also be applied to the ditch ends where the reservoirs are densely covered with forks.

[0049] The implementation steps of the present invention can be summarized as firstly calculating the remote sensing water body index, secondly constructing an integrated calculation model of different indices, and finally extracting water body information by threshold value segmentation. Each implementation step is...

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Abstract

In a water resource remote sensing survey, water body information is required to be extracted by using a middle-high-resolution image along with fine management of the water resource. However, since a high-resolution satellite image has fewer bands, the construction of an automatic water body extraction model is not facilitated, and further relatively fewer methods for effectively extracting water body information are available, and the error extraction rate and the extraction omission rate are higher. The invention constructs a new SPOT5 image-based automatic water body extraction method. According to the method, the polarization of the grey value of a water body is realized by constructing a calculation model capable of homogenously enhancing a water body index and multiple indexes based on remote sensing image background value research, and high-precision automatic extraction of the water body is realized on the basis by using improved automatic threshold selection algorithm, mathematical morphological filtering algorithm and thinning algorithm and the like. Experimental comparison shows that the influence of topographic shadowing, an inhabited place and the like can be eliminated to the greatest extent, a larger water body can be effectively extracted, and higher extraction precision on a finer water body is realized.

Description

technical field [0001] The invention belongs to the technical field of automatic water body extraction algorithms, and relates to a method for extracting target water body information with simple, effective and high-precision extraction algorithms. [0002] Background technique [0003] In the remote sensing survey of water resources, researchers use low-precision satellite images such as TM and AVHRR to investigate and extract water body information. For this purpose, a variety of effective methods have been proposed, and good research and application results have been achieved. With the fine management of water resources, it is necessary to use medium and high-resolution images to extract water body information, such as SPOT5, QuickBird and IKONOS images. However, due to the small number of bands of high-resolution satellite images, it is not conducive to the construction of automatic water body extraction models. Therefore, there are relatively few research methods that ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/89G06F19/00
Inventor 杨树文姚花琴李轶鲲雍万铃刘涛
Owner LANZHOU JIAOTONG UNIV
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