A method for estimating the relative motion of the earth background relative to a large ellipse remote sensing satellite

Abstract

The invention discloses a large ellipse remote sensing satellite and earth background relative motion estimation method, which comprises the steps of establishing an earth core fixed connection coordinate system, a sensor coordinate system and an image coordinate system, and constructing the conversion relationship between the earth core fixed connection coordinate system and the image coordinate system; converting any point A (X, Y, Z) (earth background point) under the earth core fixed connection coordinate system into a coordinate (u, v) of the point on an imaging surface; determining a coordinate point A1 (X', Y', Z') of the earth background central point A (X, Y, Z) after a moment of delta t, and determining the corresponding image surface coordinate (u', v') according to the mapping relationship from the object surface to the image surface; calculating the offset of all the earth background points needing to be subjected to relative motion estimation in an earth background region. The method creates theory modeling, adapts to moving platforms and moving targets, and is relatively simple in algorithm, and an image motion calculation model is more accurate.

Description

technical field [0001] The invention belongs to the intersection field of computer vision and aerospace technology, and more specifically relates to a method for estimating the relative motion of the earth background of a large ellipse remote sensing satellite. Background technique [0002] The related technology research of large elliptical orbit satellite remote sensing detection system has always been a matter of great concern to all countries. The main difference between aerospace photography and general terrestrial photography is that the aerospace camera is always in motion during the working process, and the objects sensed by it remotely also have various motion states, such as the relative motion of the earth background caused by the rotation of the earth, and the real object exercise. The optical axis of the satellite sensor camera in a large elliptical orbit always points to the North Pole, coupled with the influence of the earth's rotation, this leads to relative...

AI Technical Summary

Problems solved by technology

[0003] In order to accurately distinguish different moving objects in remote sensing imaging, so as to extract real moving objects (moving targets relative to the earth background), it is necessary to analyze the motion of the earth background, but so far, there is no remote sensing A better analysis method for the relative motion of the earth background during imaging

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