Optical remote sensing satellite uncontrolled internal calibration method and system

Abstract

The invention provides an optical remote sensing satellite uncontrolled internal calibration method and a system. The method comprises the following steps: modeling an optical remote sensing satelliteinternal calibration model; selecting three or more intersection images with overlapping regions to form a multi-degree overlapping image; acquiring image space coordinates of homonymous connection points by using the multi-degree overlapped images; utilizing the image space coordinates of the homonymous connection points to construct an error equation about internal calibration model parameters;and solving an error equation of the internal calibration model parameters to obtain the internal calibration model parameters. According to the method, the uncontrolled internal calibration of the optical remote sensing satellite can be realized by utilizing the relative relationship of three or more than three overlapped images, and the problem that the traditional internal calibration method of the optical remote sensing satellite highly depends on a high-precision three-dimensional ground calibration field is solved.

Description

technical field [0001] The invention belongs to the field of geometric processing of remote sensing images, and relates to a method and system for internal calibration of optical remote sensing satellites. Background technique [0002] The ideal optical imaging model of remote sensing optical satellite satisfies the principle of perspective: the perspective center, image point and object space point meet the collinear condition. However, due to remote sensing sensor and lens production, processing, installation errors and laboratory measurement errors, the internal orientation elements used to determine the position of the image point often have higher-order distortion errors, making the actual image point position deviate from the ideal image point. Position, these distortion errors are difficult to be eliminated in the subsequent band control processing, and ultimately reduce the relative positioning accuracy of the image. Internal calibration is to detect the distortion ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that the internal calibration of traditional optical remote sensing satellites is highly dependent on the high-precision three-dimensional ground calibration field, the present invention provides an uncontrolled internal calibration method for optical remote sensing satellites

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