Data processing method of intreference superspectrum imaging instrument

A data processing and hyperspectral technology, applied in the fields of interference spectroscopy, spectrum investigation, electrical components, etc., can solve the problems of limited correction range, complex calculation process, and high requirements for implementation procedures, achieving strong correction ability, simple operation process, The effect of fast operation

Inactive Publication Date: 2005-03-23
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0003] The invention solves the technical problems in the background technology that the calculation process is complex, the correction range is limited, and the implementation process is demanding

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  • Data processing method of intreference superspectrum imaging instrument

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Embodiment Construction

[0023] The present invention is a method for data inversion of the interferometric hyperspectral imager. The data obtained by the hyperspectral imager is not the final data that can be directly used by the user, so the spectral inversion must be performed on the interferogram data collected by the instrument to achieve Obtain the spectrogram and hyperspectral image sequence ultimately required by the user. The invention introduces a correction factor and realizes a processing method for an actual instrument through a fast Fourier transform method. Specifically, all data are treated as ordinary signals, as long as the number of data is even, the fast Fourier transform can be performed directly; if it is odd, it can be filled with zeros. After the fast Fourier transform, the imaginary number is generated, and the phase correction can be completed by taking the modulus of the real part and the imaginary part. See attached picture.

[0024] 1. Radiometric calibration. Correct t...

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Abstract

The invention is a data processing method for interference super spectrum imaging device. It extracts point interference diagram and generates black white quick view diagram; then carries on radiosity calibration, and filters and extracts the effect interference diagram, and it is restored into the target spectrum; after the phase error is eliminated; acquires spectrum density of each ground radiation; then synthesizes them into a single color diagram series; finally they are synthesized into a color image. The invention solves the problem that the calculation process is complex in the background technology, the correction range is limited. It can use Fourier transition directly; the calculation speed can be upgraded for several times.

Description

technical field [0001] The invention relates to a data processing method of an interference type hyperspectral imager. Background technique [0002] Interferometric spectral imaging emerged in the 1990s as a remote sensing observation technology, and its data processing method is the core of this technology. At present, there are only some theoretical analysis in the world, and almost no relevant reports on data processing methods. Theoretically, the core of interferometric hyperspectral imager data processing lies in phase correction, and the main phase correction methods are deconvolution and cosine transform. Due to the difference between the actual instrument and the theoretical analysis, the real results cannot be obtained directly by the above method, so it needs to be corrected. The deconvolution method is to find the position of zero optical path difference first, and then use the small bilateral data to perform Fourier transform to obtain the phase information of t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J3/45H04B1/66H04N7/24
Inventor 相里斌黄旻
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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