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Hyperspectral image acquisition imaging system and control method based on compressive sensing

A hyperspectral image and imaging system technology, 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 and sampling, solving waste of resources and easy implementation.

Active Publication Date: 2017-07-28
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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  • Hyperspectral image acquisition imaging system and control method based on compressive sensing
  • Hyperspectral image acquisition imaging system and control method based on compressive sensing
  • Hyperspectral image acquisition imaging system and control method based on compressive 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 imaging system and a control method based on compressive sensing. Firstly, a digital mirror device (DMD) performs compressive sampling on image information; secondly, a liquid crystal tunable filter (LCTF) controls permeable light wavelength and spectral resolution, and then an area array charge coupled device (CCD) acquires light intensity information; and finally, an analog adder and an ADC (Analog-to-Digital Converter) perform signal processing, and store the processed digital quantity in a memory. The hyperspectral image acquisition imaging system and the control method based on the compressive sensing provided by the invention realize signal sampling and compression, and make sampling data much smaller than the amount of data required by the traditional Nyquist sampling theory; and also solve the problem of waste of resources caused by transmission pressure and a large amount of redundant information due to hyperspectral data acquisition.

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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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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