Hyperspectral imaging system and method based on annular wavelength gradient filter and compressed sensing

Abstract

The invention discloses an annular wavelength gradient filter, a hyperspectral imaging system and an imaging method of compressed sensing, which are used for acquisition and reconstruction of hyperspectral images, and accelerate the acquisition speed of spectral images. The imaging system of the present invention includes a central shaft, a high-speed motor, a lens, a detector array, a hybrid spectral processing module, and an annular wavelength gradient filter connected to the high-speed motor through the central shaft fixed on the housing, so that the spectrum of the hyperspectral image The inter-resolution is variable, and more spectral information is preserved in the hyperspectral image. The method of the present invention, by calculating the aliasing matrix of the position of the selected pixel, overcomes the problem of matching the exposure time of the imaging device with the rotational speed of the passive filter in the prior art method, so that the coupling of the imaging method of the present invention and the imaging system The reliability is reduced, and the imaging system is easy to control.

Description

technical field [0001] The invention belongs to the technical field of image processing, and further relates to an annular wavelength gradient filter and a compressed sensing hyperspectral imaging system and method in the technical field of hyperspectral image processing. The invention can be used for the acquisition and reconstruction of the hyperspectral image, and accelerates the acquisition speed of the spectral image. Background technique [0002] Hyperspectral imaging technology is now widely used in food safety, medical diagnosis, aerospace and other fields. Hyperspectral images are not just the traditional so-called black, white or R / G / B distinctions, but N channels in the spectral dimension, which are imaged separately to form a data cube. The most important thing in hyperspectral imaging technology is to obtain spectral information of a large number of different wavelength bands. The purpose of hyperspectral imaging is to obtain the spectral vector of each pixel ...

AI Technical Summary

Problems solved by technology

The disadvantage of this system is that the system requires multiple sets of lenses, gratings and detectors to cooperate precisely, which is relatively complicated.

The disadvantage of this method is that this method requires the exposure time of the imaging device to match the rotation rate of the passive filter, which makes the imaging method highly coupled with the imaging device and requires high-precision mechanical control

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