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Nudity bed rock information extraction method based on soil index

A technology of exposed bedrock and information extraction, applied in radiation pyrometry, measuring devices, instruments, etc., can solve problems such as difficult operation and lack of stability of mixed pixel decomposition results, and achieve simple and clear operation, easy promotion, Effects with simple processing algorithms

Inactive Publication Date: 2013-04-24
PEARL RIVER HYDRAULIC RES INST OF PEARL RIVER WATER RESOURCES COMMISSION
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Problems solved by technology

At present, this method is not mature enough. In the actual application process, there are uncertainties in the determination of the number of ground object types and the selection of pure pixels, resulting in the lack of stability of the final mixed pixel decomposition results, and the difficulty of actual analysis operations. Big

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  • Nudity bed rock information extraction method based on soil index
  • Nudity bed rock information extraction method based on soil index
  • Nudity bed rock information extraction method based on soil index

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Embodiment 1

[0036] Depend on figure 2 It can be seen that in the two-dimensional space composed of near-infrared (NIR) and red (RED) bands of remote sensing images, the spectral data of soil and rock background are basically distributed along the soil line, and the spectral reflectance of bare soil and rock is in the There is not much difference between the red light band and the near-infrared band, which are basically distributed along the bisector of the two axes. It is projected on different intervals of the soil line, showing that the soil index values ​​​​of bare soil and bare rock are different. The soil index can be used to separate the two vegetation and crops have low reflectance in the red band and relatively high spectral reflectance in the near-infrared band, mostly located on the upper left of the soil line, and their values ​​projected onto the soil line are comparable to those of bare rock and bare soil, respectively. The soil index values ​​are in the same interval, but v...

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Abstract

The invention discloses a nudity bed rock information extraction method based on a soil index. Specifically, a holomorphy soil index and a normalized differential vegetation index are respectively calculated according to a red light band of a remote-sensing image and a near-infrared band, and a soil index chart and a normalized differential vegetation index are obtained. Nudity bed rock information is extracted according to characteristic differences of rock information and soil information in the soil index chart, and non-vegetation information is extracted through the normalized differential vegetation index chart. A picture element of the nudity bed information and the non-vegetation information is extracted to obtain the nudity bed rock information. According to the nudity bed rock information extraction method based on the soil index, a remote-sensing image picture is utilized, the extraction of the nudity bed rock information is achieved, bed rock nudity rate of a land parcel pattern spot can be analyzed based on the nudity bed rock information chart, and data support for karst area water and soil loss and stony desertification grading is provided. The nudity bed rock information extraction method based on the soil index has the advantages of being simple, fast, accurate and capable of not relying on an operator completely.

Description

technical field [0001] The invention relates to the field of information extraction of exposed bedrock, in particular to a method for extracting information of exposed bedrock based on soil index. Background technique [0002] The karst area in southwest my country is one of the three major karst distribution areas in the world, with a karst area of ​​up to 1 million square kilometers. The karst area in Southwest my country has a humid, hot and rainy climate, strong karst development, extremely low soil-forming ability of rocks, thin soil, and steep terrain. The pollution is very serious, and the ecological environment is extremely bad. According to the "Technical Standards for Comprehensive Control of Water and Soil Erosion in Karst Areas" (SL461-2009), the exposed rate of bedrock is the core index factor for the classification of soil erosion intensity, rocky desertification intensity, soil erosion degree and potential rocky desertification risk level in karst areas . At...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J5/00
Inventor 刘超群余顺超王敬贵
Owner PEARL RIVER HYDRAULIC RES INST OF PEARL RIVER WATER RESOURCES COMMISSION
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