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Graded slope SCS+C model mountainous topographic correction method

A terrain correction and slope grade technology, applied in image data processing, instruments, calculations, etc., to achieve the effects of simple terrain correction, improved work efficiency, and convenient operation

Inactive Publication Date: 2014-03-12
BEIJING FORESTRY UNIVERSITY
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Problems solved by technology

[0007] In order to overcome the troubles of the existing terrain correction methods in the terrain correction process of remote sensing images, and improve the correction accuracy and work efficiency, the purpose of the present invention is to provide a slope level SCS+C model for mountainous remote sensing image terrain correction and its use method, Realize high-precision terrain correction of remote sensing images in mountainous areas, and overcome the shortcomings of existing technologies

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  • Graded slope SCS+C model mountainous topographic correction method

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[0018] The sub-slope level SCS+C terrain correction is composed of the sub-slope level coefficient C and the SCS model, where the sub-slope level coefficient C is 1-5, 5-10, 10-15, 15-20, 20-25, 25-30, 30-35, 35-40, 40-45, 45- the maximum slope, one grade every 5 degrees (except 0-1 degree), the sub-slope grade coefficient C is calculated with the SCS model, and the sub-slope grade coefficient C is divided into The section calculates the relationship between the coefficient C and the SCS model. Sub-slope grade coefficient C and SCS model compose sub-slope grade SCS+C terrain correction. The specific implementation is as follows:

[0019] In the topographic correction of remote sensing images in mountainous areas with complex terrain conditions, there is a steep or gentle slope in the remote sensing image processing area that cannot be followed by a standard, as shown in the figure: First, according to the solar zenith angle and solar azimuth angle of the remote sensing image ...

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Abstract

The invention discloses a graded slope SCS+C model mountainous topographic correction method. Graded slope SCS+C topographic correction of a remote-sensing image includes SCS topographic correction and graded slope coefficient SCS+C; the graded slope coefficient SCS+C is divided into grades of 5 degrees, excluding 0-1 degree, and each slope grade coefficient is added in the SCS topographic correction; the remote-sensing image is subjected to topographic correction by a graded slope SCS+C model. Cosine topographic correction and the graded slope coefficient SCS+C are combined, so that a finer topographically-corrected remote-sensing image can be obtained by mountainous remote-sensing image topographic correction, and the defect that only one coefficient SCS+C is applicable to the whole remote-sensing image is overcome. The graded slope SCS+C topographic correction is simple and convenient to operate, and remote-sensing image topographic correction is higher in precision.

Description

technical field [0001] The invention relates to a method for terrain correction in remote sensing image processing, in particular to a terrain correction method for remote sensing images in mountainous areas by a slope-level SCS+C model and a method for using the same. technical background [0002] In the traditional remote sensing image terrain correction, over-correction has always been a difficult problem to solve, usually using COS model, SCS model, C model, SCS+C model, CIVCO model, Minaert model, statistical empirical model, applied physical model, statistical Empirical models, semi-physical and semi-empirical models, all of the above methods have their shortcomings: [0003] ① In the terrain correction of remote sensing images, the COS model and SCS model, when applying the physical model, are limited by factors such as terrain, slope, and stand density, making it difficult to measure the horizontal distance, and the calculation is more complicated, which limits the u...

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Application Information

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IPC IPC(8): G06T5/00
Inventor 张晓丽李宏志王月婷张凝王书涵董素静
Owner BEIJING FORESTRY UNIVERSITY
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