Laser & Optoelectronics Progress, Volume. 55, Issue 6, 061201(2018)

Analysis and Correction of Coded Pixel Distortion in Coded Aperture Imaging Spectrometer

Dantong Zhu1,2、1; 2; , Honghai Shen1、1; , Mingyu Yang1、1; , Cheng Chen1、1; , and Tongling Nan1,2、1; 2;
Author Affiliations
  • 1 Key Laboratory of Airborne Optical Imaging and Measurement, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin 130033, China
  • 2 University of Chinese Academy of Sciences, Beijing 100049, China
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    Figures & Tables(20)
    Principle of SDCAIS based on DMD
    (a) Appearance and (b) reflective array of DMD
    Correspondence of DMD and the detector in space
    Correspondence of DMD and the detector. (a) In ideal condition; (b) in fact condition
    Optical path of the experiment
    Image which is out of focus
    Hollow square calibration pattern with the fringe width of 8 pixel loaded on DMD
    Image after matching for detector and DMD in the direction of θ
    Location of the center of DMD on detector
    Comparison diagram of the effect. (a) Effect of mean value; (b) detail of mean value; (c) effect of mid-value; (d) detail of mid-value
    Result after binarizational processing
    Results after processing with each edge extraction operator. (a) Prewitt operator: threshold is 0.04; (b) Log operator: threshold is 2; (c) Log operator: threshold is 3; (d) Canny operator: threshold is 0.2
    Schematic diagram of tilt angle
    Comparison of before and after correction. (a) Before correction; (b) after correction
    Pattern collected by detector in theory
    Comparison of the hollow square pattern with the fringe width of 4 pixel (a) before and (b) after correction
    Grid stripes with the side length of 8 pixel (a) before and (b) after correction; grid stripes with the side length of 16 pixel (c) before and (d) after correction
    Colorful experiment objective
    Comparison of colorful dull image with 15 orders coding before and after correction. (a) Before correction; (b) after correction
    Image after 2D mid-value filtering process
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    Dantong Zhu, Honghai Shen, Mingyu Yang, Cheng Chen, Tongling Nan. Analysis and Correction of Coded Pixel Distortion in Coded Aperture Imaging Spectrometer[J]. Laser & Optoelectronics Progress, 2018, 55(6): 061201

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    Paper Information

    Category: Instrumentation, Measurement and Metrology

    Received: Sep. 26, 2017

    Accepted: --

    Published Online: Sep. 11, 2018

    The Author Email: Honghai Shen (shenhh@ciomp.ac.cn)

    DOI:10.3788/LOP55.061201

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