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Automatic extraction method for alluvial-proluvial fan information

An alluvial fan and automatic extraction technology, applied in image data processing, instrument, character and pattern recognition, etc., can solve the problems of low translation accuracy and low efficiency, and achieve the effect of high accuracy, high speed, and elimination of terrain shadows.

Active Publication Date: 2011-11-02
CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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Problems solved by technology

[0004] However, on the one hand, since the interpretation of remote sensing images using manual visual interpretation is a complex cognitive process, it often takes several repeated interpretations to obtain the correct results. Interpretation of one scene data and multiple disaster information It often takes several days or even longer, so the efficiency of this method is relatively low
On the other hand, when interpreting remote sensing images using the method of manual visual interpretation, only when there are differences in color or brightness on the remote sensing images, and this difference can be visually distinguished by the interpreter, can the ground Objects and backgrounds are distinguished, and the interpretation accuracy of this method varies from person to person, resulting in splicing of interpretation results. Therefore, the translation accuracy of this method is relatively low

Method used

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  • Automatic extraction method for alluvial-proluvial fan information
  • Automatic extraction method for alluvial-proluvial fan information
  • Automatic extraction method for alluvial-proluvial fan information

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Embodiment Construction

[0021] The embodiments of the present invention will now be described with reference to the accompanying drawings, in which similar element numbers represent similar elements.

[0022] Such as figure 1 The method for automatically extracting alluvial fan information in this embodiment includes the following steps:

[0023] Step S1: Take the remote sensing image of the alluvial fan or the remote sensing image of the alluvial fan at the target site through the TM satellite, and compare the near-infrared band, the red light band, and the green light of the remote sensing image of the alluvial fan or the remote sensing image of the alluvial fan. Atmospheric correction pre-processing for band, blue band and mid-infrared band;

[0024] Step S2: Obtain the red light wavelength, blue light wavelength, near-infrared wavelength and green light wavelength of the ground objects detected by the satellite, and according to the formula Calculate the remote sensing extraction index of the ground o...

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Abstract

The invention discloses an automatic extraction method for alluvial-proluvial fan information. The method comprises the following steps of: (1) calculating a remote sensing extraction index, a vegetation index and a humidity index of a ground object in a remote sensing image and generating a remote sensing extraction index grey scale image, a vegetation index grey scale image and a humidity index grey scale image respectively; (2) synthesizing a colorized combined image by using the remote sensing extraction index grey scale image, the vegetation index grey scale image and the humidity index grey scale image; (3) performing main component transformation on the colorized combined image and extracting a first main component to generate a first main component grey scale image; and (4) performing threshold value partitioning on the first main component grey scale image to acquire a binary image of an alluvial-proluvial fan so as to extract the alluvial-proluvial fan information. By the method, the alluvial-proluvial fan information can be extracted accurately, and the extraction precision and the extraction speed are high.

Description

Technical field [0001] The invention relates to the field of remote sensing extraction of ground feature information, in particular to an automatic extraction method of alluvial fan information. Background technique [0002] Alluvial fans include alluvial fans and alluvial fans. They are fan-shaped fans formed by solid materials such as sand, stone, mud, etc., carried by perennial rivers and temporary mountain currents that spread out to the open land with the mouth of the foothills as the apex after exiting the mountain. Accumulated landforms are part of alluvial plains. Alluvial fans have important applications and significance in the investigation and evaluation of water resources and the environment. At the same time, alluvial fans are very important in engineering geological surveys due to their different causes and different levels of particle classification. The alluvial fan is a spatial geographic entity, and its development range is tens of kilometers or even larger. It...

Claims

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Application Information

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IPC IPC(8): G06K9/46G06K9/36G06T7/00
Inventor 冯光胜杨树文高山顾湘生李小和赵新益曹柏树
Owner CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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