Satellite image automatic geometric correction method and system, medium and terminal equipment

Abstract

The invention discloses an automatic geometric correction method and device suitable for domestic polar region moonlet images, a storage medium and terminal equipment. The method comprises the following steps: automatically and preferentially screening a homologous sensor reference image for automatic geometric correction of a target satellite image; dividing the whole image into four parts and nine parts to be subjected to image enhancement processing, and then extracting homonymy point pairs of the target satellite image and the reference image to obtain a geographic coordinate file used for geometric correction; and performing correction precision evaluation on the images, corrected by different methods, of the target satellite so as to screen out an optimal correction scheme, and correcting the images of the target satellite according to the optimal correction scheme. According to the method and system, the homologous sensor registration reference images can be automatically and preferentially screened, selection of homonymy points is increased by highlighting detail features of polar images through an image enhancement method, and the optimal geometric correction scheme is screened out according to the image correction precision, so that the defect that the geometric positioning precision of polar moonlets in China is not high is overcome.

Description

technical field [0001] The present invention relates to the technical field of remote sensing image processing, in particular to a satellite image automatic geometric correction method, system, storage medium and terminal equipment. Background technique [0002] The existing image registration for homogenous sensors is mainly carried out using feature-based methods, but in the face of massive data registration, it is difficult to automatically select the best reference images for homogenous sensor registration and the selection of homonymous points. Especially for polar images, due to the high reflectivity of ice and snow and the sparse texture of the ice sheet surface, the scale-invariant feature transformation algorithm extracts relatively few feature points on the surface of the ice sheet, which brings difficulties to the geometric correction of polar images. Contents of the invention [0003] The technical problem to be solved by the embodiments of the present inventio...

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Problems solved by technology

[0003] The technical problem to be solved by the embodiments of the present invention is to provide a satellite image automatic geometric correction method, system, storage medium and terminal equipment, which can realize automatic selection and selection of homologous sensor registration reference images, and highlight polar images through image enhancement methods The detailed features to increase the selection of points with the same name, and select the optimal geometric correction scheme according to the image correction accuracy, so as to overcome the defect of low geometric positioning accuracy of small polar satellites in my country

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