A hyperspectral image acquisition imaging system and control method based on compressed sensing

A technology of hyperspectral image and imaging system, applied in the field of image signal processing, can solve problems such as waste of transmission pressure resources, and achieve the effects of flexible compression sampling, shortening acquisition time, and solving waste of resources

Active Publication Date: 2019-10-18
HANGZHOU DIANZI UNIV
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Problems solved by technology

The main purpose is to solve the transmission pressure caused by hyperspectral data acquisition and the waste of resources caused by a large amount of redundant information.

Method used

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  • A hyperspectral image acquisition imaging system and control method based on compressed sensing
  • A hyperspectral image acquisition imaging system and control method based on compressed sensing
  • A hyperspectral image acquisition imaging system and control method based on compressed sensing

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Embodiment Construction

[0046] figure 1 It is a schematic diagram of the optical path imaging system based on compressed sensing hyperspectral image acquisition of the present invention, the imaging system includes: a first lens, a DMD, an LCTF, a second lens and an area array CCD;

[0047] There is a DMD 2 on one side of the first lens 1, which focuses and projects the imaging target 0 onto the DMD; the DMD randomly samples the image information and reflects it to the LCTF 3; the light reflected to the LCTF is adjusted by the LCTF so that the light of the corresponding wavelength can pass through. The second lens 4 is located on the outgoing light path of the LCTF; the second lens 4 images the DMD surface onto the area array CCD. That is, the plane where the imaging target 0 is located and the DMD2 surface are mutually conjugate surfaces, and the DMD 2 surface and the CCD 5 surface are also mutually conjugate surfaces. figure 1 The planes that are conjugate planes are indicated by asterisks in .

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Abstract

The invention discloses a hyperspectral image acquisition and imaging system and control method based on compressed sensing; the invention first compresses and samples the image information through a digital micromirror (DMD) device, and secondly controls the image information through a liquid crystal tunable filter (LCTF). Through the light wavelength and spectral resolution, the light intensity information is obtained through the area charge-coupled device (CCD), and finally the signal is processed through the analog adder and ADC converter, and the processed digital quantity is stored in the memory. The invention realizes signal sampling and compression at the same time, so that the sampling data is much smaller than the amount of data required by the traditional Nyquist sampling theory; it solves the transmission pressure caused by hyperspectral data collection and the waste of resources caused by a large amount of redundant information, etc. question.

Description

technical field [0001] The invention belongs to the technical field of image signal processing, and relates to a hyperspectral image acquisition imaging system and control method based on compressed sensing, which can be used for hyperspectral image acquisition in the field of remote sensing. Background technique [0002] Hyperspectral imaging is an emerging technology, also known as imaging spectrometer, which can acquire a large number of narrow-band continuous spectral images, and can use many narrow electromagnetic wave bands to obtain relevant data from objects of interest, including rich space, Radiometric and spectral triple information. Compared with traditional color images (3 spectral bands, covering red, green and blue bands respectively), and traditional multispectral images (usually several spectral bands), hyperspectral data has multiple bands, high spectral resolution, It has a large amount of data and a combination of maps and spectra. Its electromagnetic sp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/225H04N5/232
CPCH04N23/54H04N23/55H04N23/80
Inventor 徐平肖冲张竞成赖小敏
Owner HANGZHOU DIANZI UNIV
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