Three-line array image POS auxiliary ground positioning method based on Kalman filtering model

Abstract

The invention provides a Kalman filtering model-based three-line array image POS (Point Of Sale) assisted earth positioning method, which comprises the following steps of: establishing a local coordinate system as a unified reference coordinate system, and converting navigation data information into the reference coordinate system; correcting the images obtained by flight to a plane with an average ground height to form an intermediate image, and carrying out image matching to extract image connection points; appointing a control point image position according to ground control point information obtained by field measurement; establishing a Kalman adjustment model, and establishing a motion equation according to parameters acquired by the POS system; and on the basis that the process of continuously acquiring images by the three-line-array camera accords with the principle of dynamics, performing adjustment iteration solution calculation of Kalman filtering of the three-line-array camera according to the motion equation to obtain position attitude data after error correction. According to the method, the positioning parameters of the image can be solved more quickly and more accurately, high-precision positioning under rare control points can be realized, and the blank of high-precision data processing of the domestic three-line array camera is effectively filled.

Description

technical field [0001] The invention belongs to the technical field of remote sensing surveying and mapping, and in particular relates to a high-precision ground positioning method for images acquired by a domestic three-line array camera. Background technique [0002] The three-line array imaging system is a device that quickly acquires ground image information. Compared with traditional fixed-frame imaging systems and multi-view oblique imaging systems, it has high data acquisition efficiency, low overall cost, and strong practicability. Now the world's most The well-known three-line array camera is the ADS series camera produced by Leica Company. After years of hard work by domestic scientific research institutes in related technical fields, the domestic three-line array camera has been successfully developed, which not only has higher resolution, but also has faster data acquisition efficiency, and can complete the acquisition of 180 square kilometers of ground data with...

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Problems solved by technology

[0007] This invention aims at the problem that the existing three-line array camera processing requires a large number of control points and the calculation model is complex and time-consuming, and provides a high-precision ground positioning processing of domestic three-line array camera images method, known as the three-line array camera POS-assisted ground positioning method based on the Kalman filter model

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