High-resolution optical satellite staring image registration method based on geometric constraints

Abstract

The invention discloses a geometric constraint-based high-resolution optical satellite staring image registration method. The method comprises the steps of S100, building a free network adjustment directional model of images by utilizing a rational function model of additional image space error compensation; S200, based on the free network adjustment directional model, performing dense matching ona stereoscopic image pair with an optimal rendezvous condition in the images to obtain coordinates of dense homonymy points; S300, generating dense point cloud data, performing gross error point deletion on the dense point cloud data, and generating digital surface model data; and S400, based on the free network adjustment directional model and DSM data, performing geometric correction on the images in sequence. By utilizing geometric locating consistency, high-precision registration of high-resolution optical satellite multi-angle staring sequence images is realized; the multi-angle staringsequence image registration problem caused by satellite platform control inaccuracy and attitude measurement inaccuracy is solved; and a high-precision data basis can be provided for subsequent application.

Description

technical field [0001] The invention belongs to the technical field of remote sensing satellite data processing, more precisely, the invention is a high-resolution optical satellite staring image registration method based on geometric constraints adopted in the ground data processing process of optical remote sensing satellites. Background technique [0002] With the gradual improvement of resolution, in order to make up for the decrease in imaging efficiency caused by the reduction of imaging width, the requirements for high-resolution remote sensing satellites' platform agility are constantly increasing, so that they can quickly maneuver imaging to meet the needs of large-scale target areas. or multi-angle imaging requirements. The staring imaging mode is an agile imaging mode for optical satellites. By adjusting the attitude of the satellite platform, different positions of the satellite on the flight track can image the same area from different angles, and obtain multi-a...

AI Technical Summary

Problems solved by technology

However, due to the large size of high-resolution images, the number of rows and columns can reach more than tens of thousands, and a single 2D image square affine transformation cannot compensate for the deformation between images

At the same time, considering the characteristics of central projection imaging, for areas with large terrain fluctuations and high buildings, the projection difference between images caused by imaging at different angles is also a feature of staring imaging, and the image square registration method may change the image projection characteristics

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