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LCTF-based full-polarization hyperspectral compressed sensing imaging system and method

A compressive sensing and hyperspectral technology, applied in polarization spectroscopy, spectrometry/spectrophotometry/monochromator, radiation pyrometry, etc., can solve problems such as inability to realize Stokes parameter compression and reconstruction , to achieve the effect of reducing signal sampling redundancy, stable operation, and high spatial resolution

Active Publication Date: 2018-12-07
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0006] In summary, the existing technology can only realize the first three Stokes parameters S of the original spectrum 0 ~S 2 The compression reconstruction of the original image cannot realize the full Stokes parameter S 0 ~S 3 compression reconstruction

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  • LCTF-based full-polarization hyperspectral compressed sensing imaging system and method

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Embodiment Construction

[0030] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0031] Based on the polarization and filtering characteristics of the liquid crystal tunable filter, the invention realizes the compressed measurement and reconstruction of four-dimensional data for the polarization dimension, spectrum dimension and space dimension of the original image. A liquid crystal tunable filter and a digital micromirror array are used to compress and measure the spectral dimension and spatial dimension information of the original image, and a combination of a linear retarder and a liquid crystal tunable filter is used to compress the polarization dimension information. Project compressed measurements of 4D data onto area detectors to reduce sampling redundancy. Based on a set of 2D compressed observations of the original image, the four Stokes parameters of the original image are reconstructed using sparse coding and regularization...

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Abstract

The invention discloses an LCTF-based full-polarization hyperspectral compressed sensing imaging system and an LCTF-based full-polarization hyperspectral compressed sensing imaging method. The LCTF-based full-polarization hyperspectral compressed sensing imaging system comprises a linear retarder, a liquid crystal tunable optical filter, a digital micro mirror array and an area array detector, wherein a Mueller matrix of the linear retarder is designed such that absolute values of first two elements of each column are different; the linear retarder and the liquid crystal tunable optical filter realize polarization dimension compression jointly; the liquid crystal tunable optical filter switches L different center wavelengths, outputs images in each band, and realizes spectral dimension compression; the digital micro mirror array encodes the images of each band, and realizes spatial dimension coding compression; and an original image is detected by means of the area array detector after sequentially passing through the linear retarder, the liquid crystal tunable optical filter and the digital micro mirror array, so as to obtain an image containing full Stokes parameters. By applying the LCTF-based full-polarization hyperspectral compressed sensing imaging system and the LCTF-based full-polarization hyperspectral compressed sensing imaging method, compression reconstruction ofthe full Stokes parameters of the original image can be realized.

Description

technical field [0001] The invention belongs to the technical field of polarized hyperspectral imaging, and in particular relates to an LCTF-based full-polarized hyperspectral compressed sensing imaging system and imaging method to realize compressed measurement and reconstruction of polarization, spectral and spatial dimensions. Background technique [0002] Polarization hyperspectral imaging technology is a combination of hyperspectral imaging technology and polarization imaging technology. Polarization hyperspectral imaging can simultaneously obtain the spatial, spectral and polarization information of the target, and analyze the geometrical and shadow characteristics of the target, the spectral characteristics of reflected, transmitted and radiated electromagnetic waves, and the physical and chemical characteristics of materials such as surface roughness, density, conductivity, and water content. Integrate perception, and then deeply evaluate, classify and identify targe...

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Application Information

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IPC IPC(8): G01J3/447G01J3/02
CPCG01J3/02G01J3/447
Inventor 许廷发樊阿馨王茜张宇寒余越徐畅
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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