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Image surface driving point-based imaging method of optical remote sensor

A technology of optical remote sensor and imaging method, which is applied in the field of optical remote sensing and can solve problems such as large amount of calculation

Active Publication Date: 2011-07-20
北京航天创智科技有限公司
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This model physics requires considerable computational

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  • Image surface driving point-based imaging method of optical remote sensor
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Embodiment Construction

[0035] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0036] like figure 1 Shown is the imaging geometric topology diagram of the optical remote sensor. The theoretical basis of the linear optical remote sensor model is as follows: the imaging position of any point P on the image plane in space can be approximated by the pinhole model, that is, any point P on the object surface The projection position of point p' on the image plane is p, and p is the intersection point of the line OP connecting the camera optical center O and point P and the image plane.

[0037] figure 1 Among them, (x, y, z) are the coordinates of the TDICCD optical remote sensor, O is the origin of the optical remote sensor coordinate system, the blue arrow is the direction of the satellite flight, Ψ y is the roll angle, Ψ x is the pitch angle. where Δp' is the ground error offset distance caused by the attitude error.

[0...

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Abstract

The invention relates to an image surface driving point-based imaging method of an optical remote sensor. The method comprises the steps of: establishing a platform optics payload geometric distortion model by utilizing a method of coordinate transformation according to a physical model transformed from a ground coordinate system to an image surface coordinate system; , fitting a small quantity of image surface driving points into an image by utilizing polynomial interpolation; and by utilizing the model, completing the imaging of the model in different postures and analyzing the image geometric distortion caused by the postures. Therefore, the effect transformation between an object surface and an image surface is realized; the calculation amount is reduced and a higher precision is maintained; meanwhile, the problem of overlarge calculation complexity in a traditional precise geometrical model is solved and the shortcoming of lacking physical meaning in a rational function model is made up.

Description

Technical field: [0001] The invention belongs to the technical field of optical remote sensing, in particular to an imaging method of an optical remote sensor based on an image plane driving point. Background technique [0002] High-resolution optical remote sensors have very strict requirements on the platform. The existing transmission-type aerospace remote sensors usually use linear array CCD push-broom imaging. Push-broom imaging is very sensitive to image geometric distortion caused by attitude instability. Image distortion caused by attitude changes is divided into three directions: roll, pitch, and yaw. In particular, it is more sensitive to the influence of high-resolution optical remote sensors. To analyze the relationship between the motion error of the satellite platform and the imaging mapping, it is necessary to establish a geometric model between the ground coordinate system and the image plane coordinate system. The traditional method strictly adopts the pr...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T3/00G01S7/48
Inventor 张智刘兆军周峰
Owner 北京航天创智科技有限公司
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