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A satellite platform tremor detection method and system based on multi-spectral images

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

Active Publication Date: 2016-05-11
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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  • A satellite platform tremor detection method and system based on multi-spectral images
  • A satellite platform tremor detection method and system based on multi-spectral images
  • A satellite platform tremor detection method and system based on multi-spectral images

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Embodiment Construction

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

[0051] figure 1 Shown is a flow chart of satellite platform tremor detection technology based on multi-spectral images. The following describes each step in the process of the embodiment in further detail.

[0052] (1) Data preparation: Perform preprocessing such as radiation correction and CCD stitching on the original multispectral image 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 collinear TDICCD optical splicing images, CCD splicing can be realized by de-overlap processing, and a complete ful...

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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 particularly relates to a technical scheme for detecting satellite platform tremor by using multi-spectral images. Background technique [0002] Satellite platform tremor refers to the turbulence caused by the periodic movement of the moving parts on the satellite or the alternation of orbital cold and heat during the orbit of the satellite, which causes the celestial body to produce a small amplitude and high frequency flutter response. . Platform tremor has the characteristics of smallness, inherentness, uncontrollability and sensitivity. With the improvement of the spatial resolution of remote sensing satellites, the impact of satellite platform tremor on the imaging quality has attracted more and more attention from the overall satellite design, camera design, and ground processing and application departments. Japan NASDA used the test satellite ETS-VI to conduct ...

Claims

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Application Information

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