Water body information extraction method based on TM (Thematic Mapper) image

A water body information and extraction method technology, applied in the intersection of remote sensing technology and GIS technology, can solve problems such as insufficient accuracy, neglect of water body information, and increase in hill shadow information.

Inactive Publication Date: 2013-02-13
NANJING UNIV OF INFORMATION SCI & TECH
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Problems solved by technology

There are inherent defects in the single-band threshold method: if the threshold is too small, the extracted hillshade information will increase; if the threshold is too large, a lot of water body information will be ignored
The water body extracted by the classical spectral relatio

Method used

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  • Water body information extraction method based on TM (Thematic Mapper) image
  • Water body information extraction method based on TM (Thematic Mapper) image
  • Water body information extraction method based on TM (Thematic Mapper) image

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Embodiment Construction

[0034] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0035] like figure 1 As shown, the present invention provides a method for extracting water body information based on TM images, which is mainly combined with geographic information system technology to extract water body information based on specific spectral calculations for specific target areas, and provide basic hydrological data for follow-up research. The method comprises the steps of:

[0036] (1) Data preprocessing stage: band data fusion is carried out first, and then image data stitching is carried out, which can effectively prevent errors that may be caused by band data boundary calculation during the image stitching process. This step includes the following specific contents:

[0037] (11) Use remote sensing image processing software for band data fusion, that is, add the files of 7 bands to the band data stack in sequence, a...

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Abstract

The invention discloses a water body information extraction method based on a TM (Thematic Mapper) image. The method comprises the following steps of: carrying out data fusion on files of seven wave bands, and then setting a proper edge processing method to carry out splicing of image data; then utilizing a boundary of a rasterized target area to cut the spliced image data; establishing a water body information extraction model aiming at wave spectrum information of the TM image; and establishing a noise removal model aiming at mountain shadow noise in the extracted water body information. According to the water body information extraction method, the water body information can be accurately extracted as far as possible by utilizing a Landsat TM satellite image, and basic hydrology information is provided for subsequent research.

Description

technical field [0001] The invention belongs to the cross field of remote sensing technology and GIS technology, and in particular relates to a water body information extraction method based on image processing. Background technique [0002] Remote sensing technology is a comprehensive detection technology that does not directly contact the detection target, detects, judges, interprets and interprets the target from long-distance perception of electromagnetic waves, visible light, and infrared rays reflected or radiated by the target, thereby revealing the characteristics of the target. Remote sensing technology has been well applied in many fields due to its advantages of wide coverage, large spectral range, high temporal and spatial resolution, high spectral resolution, strong penetrating ability, and non-destructive detection of archaeological cultural relics. [0003] After the electromagnetic radiation information of ground objects is recorded, transmitted, processed an...

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Application Information

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IPC IPC(8): G06T1/00
Inventor 毕硕本王启富毕胜杰梁静涛乔文文
Owner NANJING UNIV OF INFORMATION SCI & TECH
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