RPC-based method for improving and calibrating block adjustment of three-linear array three-dimensional satellite

A technology of block adjustment and three-line array, which is applied to the interpretation of photos, measuring devices, instruments, etc., can solve the problems of loss of accuracy and inability to check the parameters of three-line array cameras, etc.
CN102168972AActive Publication Date: 2011-08-31CHINA CENT FOR RESOURCES SATELLITE DATA & APPL
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA CENT FOR RESOURCES SATELLITE DATA & APPL
Publication Date
2011-08-31

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Abstract

The invention relates to a rational-polynomial-coefficients (RPC)-based method for improving and calibrating the block adjustment of a three-linear array three-dimensional satellite, which comprises the following steps of: (1) determining the mapping relationship between ground points and image points, namely a strict imaging model; (2) solving RPC parameters of each image in three linear arrays according to the strict imaging model, and searching for connection points among the three linear arrays by image matching; (3) listing three affine transformation formulas of fore sight, front sight and back sight of the three-linear array images; (4) establishing an error equation and solving to acquire corrections of affine transformation parameters, and revising the affine transformation formulas by utilizing the corrections; (5) listing the affine transformation formulas of the fore sight and the back sight again by utilizing camera parameters and the revised affine transformation formula of the front sight; and (6) solving the revised affine transformation formulas of the fore sight and the back sight in the step (4) and the listed affine transformation formulas of the fore sight and the back sight in the step (5) simultaneously to acquire the corrections of the camera parameters, and revising the camera parameters to improve and calibrate the block adjustment of the three-linear array three-dimensional satellite.
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Description

technical field

[0001] The invention relates to an improvement and checking method of block adjustment of three-line array three-dimensional satellite images, which can be used for processing various high-precision three-line array three-dimensional satellite images. Background technique

[0002] The high-resolution earth observation system is an important strategic resource and infrastructure of the country. The three-line array stereoscopic mapping satellite is a kind of high-precision earth observation satellite. The three-line array camera and its platform have high resolution, high geometric positioning accuracy and Features of Stereo Imaging. However, since the imaging accuracy of the three-line array camera is closely related to the accuracy of the satellite platform, and the relationship between the three-line arrays also needs to be further corrected by ground processing, the high-precision ground processing method is particularly important. The three-line array th...

Claims

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