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Satellite platform chattering detection method and system based on multispectral image

A multi-spectral image, satellite platform technology, applied in the field of satellite remote sensing ground preprocessing, can solve the problem of difficult measurement of satellite platform tremor

Active Publication Date: 2014-08-13
WUHAN UNIV
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Problems solved by technology

[0004] Aiming at the problem that satellite platform tremors are difficult to measure, the present invention provides a technical solution for satellite platform tremor detection based on multi-spectral images

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  • Satellite platform chattering detection method and system based on multispectral image

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Embodiment Construction

[0050] The technical scheme of the invention can adopt computer software to support the automatic operation process. The technical solution of the present invention will be described in detail below in conjunction with the drawings and embodiments.

[0051]figure 1 Shown is a technical flow chart of satellite platform tremor detection based on multi-spectral imagery, and the method of the present invention will be further described in detail below for each step in the process flow of the embodiment.

[0052] (1) Data preparation: The original multispectral images are preprocessed by radiation correction and CCD stitching to obtain unregistered multispectral images.

[0053] In order to improve the matching accuracy, it is necessary to perform relative radiation correction processing on the original multispectral image to eliminate the influence of band noise on subsequent processing. In addition, for the collinear TDICCD optical stitching image, the CCD stitching can be reali...

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Abstract

The invention provides a satellite platform chattering detection method and system based on a multispectral image. The satellite platform chattering detection method based on the multispectral image comprises the steps of data preparation, wherein the original multispectral image is preprocessed, and a non-registered multispectral image is obtained; wave band selection, wherein two wave bands for detection are selected; intensive matching, wherein a sample point is selected, a pixel-level matching result is obtained through related image matching, coordinates of homologous image points of the sub-pixel accuracy are obtained through a least-square matching method, and matched homologous points are obtained; chattering analysis, wherein registering errors of the matched homologous points are calculated point by point, the variation of the registering errors along with imaging lines is obtained through analysis line by line, spectral analysis is carried out on platform chattering time sequence data through Fourier transform, and the spectrum features caused by chattering are obtained. The satellite platform chattering detection method and system based on the multispectral image achieve satellite platform chattering detection without high-accuracy and high-frequency chattering measurement equipment, and can accurately obtain the chattering frequency.

Description

technical field [0001] The invention belongs to the field of satellite remote sensing ground preprocessing, and in particular relates to a technical solution for detecting tremor of a satellite platform by using multispectral images. Background technique [0002] Satellite platform tremor refers to the disturbance caused by the periodic movement of moving parts on the satellite or the alternation of cold and heat due to orbital changes during the operation of the satellite, which causes the star to produce a flutter response with a small amplitude and high frequency . Platform tremor has the characteristics of tiny, inherent, uncontrollable and sensitive. With the improvement of the spatial resolution of remote sensing satellites, the impact of satellite platform tremors on imaging quality has been paid more and more attention by the satellite overall design, camera design, and ground processing and application departments. Japan's NASDA used the experimental satellite ETS...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H9/00
Inventor 王密朱映潘俊李德仁
Owner WUHAN UNIV
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