Method for automatically registering mountainous area satellite image to geographical base map

Abstract

The invention discloses a method for automatically registering a mountainous area satellite image to a geographical base map, which relates to the technical field of precise geometric correction in remote sensing image preprocessing. The method comprises the specific steps of (1), extracting a terrain line of the mountainous area satellite image; (2), extracting a terrain line of a DEM (Digital Elevation Model); (3), constructing an identical object point database; (4), performing precise geometric correction operation; and (5), estimating a correction result error. The method realizes a technology for automatically correcting the mountainous area satellite image by a computer, and can overcome the deficiencies of strong subjectivity and high time and labor consumption of manual acquisition of control points during correction of the mountainous area satellite image by only using the terrain line of the DEM on the premise of ensuring that control point quantity and quality meet application demands.

Description

Technical field: [0001] The invention relates to a method for automatically registering a satellite image in a mountain area to a geographic base map, and belongs to the technical field of geometric fine correction in remote sensing image preprocessing. Background technique: [0002] As an indispensable part of remote sensing digital image preprocessing, geometric fine correction, especially the rapid and accurate registration of remote sensing images to geographic base maps, is the key to popularization and popularization of remote sensing data, as well as almost all specialized remote sensing applications. Base. For low-to-medium resolution mountain satellite images, due to the mixture of small roads, water systems and surrounding features, registration using traditional methods has the problems of difficult to find control points, insufficient number of control points, and low matching accuracy. The geometric fine correction method of extracting geodetic lines from a rel...

AI Technical Summary

Problems solved by technology

However, if the DEM or the three-dimensional graphics generated by the DEM are used to manually find or collect control points, such as ridges, valleys, peaks, depressions, etc., the error is large due to the influence of human subjective judgment, and it is not easy to realize computer batch processing

Therefore, in view of the difficulty of finding conventional control points in remote sensing images of mountainous areas, and the time-consuming and laborious manual collection of control points based on DEM geodetic lines, a method for automatically registering satellite remote sensing images of mountainous areas to the geographic base map is invented. Imaging has important practical significance in the vast majority of industry application requirements in mountainous areas

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