Method used for gully erosion extraction based on landform and remote sensing image fusion technology

Abstract

The invention provides a method used for gully erosion extraction based on landform and remote sensing image fusion technology. The method is based on conversion between remote sensing RGB (red, green, and blue) color space and HIS (hue, intensity, and saturation) color space; linear standard surface roughness omega<-><'> is taken as weight of sun northwest shaded relief model (SRM); 1-omega<-><'> is taken as color intensity component weight; novel color intensity component I' is obtained via summation; conversion from HIS color space to RGB color space is performed based on the novel color intensity image I', and fusion of landform information and remote sensing image is realized, so that gullies are represented by recesses, and peaks are represented by convexes in remote sensing images; and interpretation on gully shoulder lines is carried out base on fused remote sensing images, and via combination with gully shoulder line gradient threshold data which is obtained via calculation based on DEM (digital elevation model). Compared with traditional remote sensing image-based gully interpretation method, the method is capable of providing remote sensing two-dimensional images with landform information according with human visual habits, gully bottom remote sensing image characteristics are clear, and gully shoulder line interpretation accuracy is high.

Description

Technical field: [0001] The present invention involves the field of remote sensing technology. Specifically, it is a extraction that applies terrain information and remote sensing image fusion technology to the edge of Yonggou.The invention can be used for optical remote sensing images to perform ditch interpretation, ditch erosion research and drawing. Background technique: [0002] Chonggou erosion is an important way to erode. It is not only an important process that leads to land degeneration, but also a major source of rivers and sediment.At present, scholars at home and abroad mainly use the ground manual measurement method (CASALI et al., 2006; vandekerckhove et al., 2001;), Extract needle (pile) monitoring method (IONITA et al., 2006; Martinez et al.2003), RTK-GPS measurement method (He Fuhong et al., 2005; YOUGQIUWU et al., 2005), aviation film and digital high -primary modelEvolution.Since the emergence of aviation photography technology in the early 1960s, remote sensi...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, and provide a method for extracting gullies based on terrain and remote sensing image fusion technology, which mainly solves the problem of obvious loss of remote sensing image spectral information in the HIS fusion method in which SRM participates

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