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Spectral image restoration method of code aperture spectral imager

A spectral imager, coded aperture technology, applied in the field of spectral restoration

Inactive Publication Date: 2013-11-20
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the problem of time scanning or space scanning existing in existing spectral imagers, the object of the present invention is to provide a spectral restoration method for coded aperture spectral imagers

Method used

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  • Spectral image restoration method of code aperture spectral imager
  • Spectral image restoration method of code aperture spectral imager
  • Spectral image restoration method of code aperture spectral imager

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Embodiment Construction

[0052] The coded aperture spectral imager involved in the present invention needs neither space scanning nor time scanning, and is very suitable for spectral imaging of instantaneous phenomena and moving objects. The coded aperture spectral imager applies compressed sensing to ordinary spectral imagers, and compresses directly during the spectral imaging process, so that the 3D data cube of the entire scene can be obtained on the basis of one imaging. Its core technology lies in its spectral restoration Algorithm, the spectral restoration method of the coded aperture spectral imager is described in detail below.

[0053] Such as figure 1 , figure 2Shown is the schematic diagram of the principle of the system of the present invention, a kind of coded aperture spectral imager, it comprises the laser that connects successively, imager, acquisition card and computer, is provided with digital micromirror device DMD in the imager barrel, it can according to input Graphics form va...

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Abstract

The invention relates to a spectral image restoration method of a code aperture spectral imager. The spectral image restoration method comprises the following steps of (1) assembling the code aperture spectral imager; (2) carrying out two-dimensional coding on a Digital Micromirror Device (DMD); (3) adjusting a monochromator; (4) calibrating the code aperture spectral imager, and recording a calibration result; (5) collecting a two-dimensional coding background image; (6) collecting a coding image; (7) processing the two-dimensional coding target image obtained by the step (6); and (8) restoring a spectral image. The spectral image restoration method solves the problem of time scan or space scan existed in the existing spectral imager, has a certain general applicability, can be used for spectrum restoration of many coding templates in the code aperture spectral imager, and has a certain guiding significance on laboratory results of other spectral imagers.

Description

technical field [0001] The invention relates to a spectral restoration method of a coded aperture spectral imager. Background technique [0002] Spectral imagers with different principles have different spectral image restoration methods. At present, the common spectral restoration methods are mainly for dispersion type, interference type, optical filter type, Hadar code transformation type and computed tomography type, etc. The dispersion type is relatively simple, and only needs simple de-aliasing of pixels. The interference type spectrum restoration requires Fourier transform and a series of processing; The conjugate gradient algorithm is mainly used. However, the existing spectral imagers all have a common defect: they cannot perform spectral imaging on transient phenomena and moving objects. Contents of the invention [0003] In order to solve the time-scanning or space-scanning problem existing in existing spectral imagers, the object of the present invention is t...

Claims

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Application Information

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IPC IPC(8): G06T5/00G01J3/28
Inventor 李芸李立波孙鑫王爽李然胡炳樑
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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