Modified Image Demodulation Algorithm for Spatially Modulated Full-Polarization Imaging Systems

Song Ye; Haofang Yan; Xiaobing Sun; Jiejun Wang; Xinqiang Wang; Fangyuan Wang; Shu Li; Yongying Gan; Wentao Zhang

doi:10.3788/AOS201939.0607001

Acta Optica Sinica, Volume. 39, Issue 6, 0607001(2019)

Modified Image Demodulation Algorithm for Spatially Modulated Full-Polarization Imaging Systems

Song Ye^1,3, Haofang Yan^1,3, Xiaobing Sun², Jiejun Wang^1,3、*, Xinqiang Wang^1,3, Fangyuan Wang^1,3, Shu Li^1,3, Yongying Gan¹, and Wentao Zhang^1,3

Author Affiliations

¹ School of Electronic Engineering and Automation, Guilin University of Electronic Technology, Guilin, Guangxi 541004, China

² Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, Anhui 230031, China

³ Guangxi Key Laboratory of Optoelectronic Information Processing, Guilin, Guangxi 541004, China

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Figures & Tables(11)

Fig. 1. Optical principle of spatially modulated full-polarization imaging system

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Fig. 2. Modulated image frequency spectrum diagram

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Fig. 3. Original input polarization

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Fig. 4. Reconstruction images. (a)-(d) Traditional demodulation algorithm; (e)-(h) modified demodulation algorithm

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Fig. 5. Spectral response curve of CCD

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Fig. 6. Interferograms. (a) [1,1,0,0]T; (b) [1,0,0,0]T

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Fig. 7. Reconstruction images obtained by different algorithms for input polarization state [1,1,0,0]T. (a)-(e) Traditional demodulation algorithm; (f)-(j) modified demodulation algorithm

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Fig. 8. Reconstruction images obtained by different algorithms for input polarization state [1,0,0,0]T. (a)-(e) Traditional demodulation algorithm; (f)-(j) modified demodulation algorithm

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Table 1. System parameters
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Table 1. System parameters
Parameter Value
Central wavelength λ /nm 540
Bandwidth /nm 20
Thickness of a single SP t /mm 6
Focal length f /mm 165.8
Resolution /(pixel×pixel) 1024×1024
Pixel size /(μm×μm) 12×12

Table 2. PSNR between test image and traditional demodulation algorithm or modified demodulation algorithm
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Table 2. PSNR between test image and traditional demodulation algorithm or modified demodulation algorithm
Algorithm S₀ S₁ S₂ S₃
Traditional algorithm 30.8855 32.2614 30.2483 31.4429
Modified algorithm 31.8174 34.3212 31.8032 32.2331

Table 3. DOP of images reconstructed by different algorithms
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Table 3. DOP of images reconstructed by different algorithms
Algorithm DOP
[1,1,0,0]^T [1,0,0,0]^T
Traditional algorithm 0.8792 0.0589
Modified algorithm 0.9842 0.0353

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Song Ye, Haofang Yan, Xiaobing Sun, Jiejun Wang, Xinqiang Wang, Fangyuan Wang, Shu Li, Yongying Gan, Wentao Zhang. Modified Image Demodulation Algorithm for Spatially Modulated Full-Polarization Imaging Systems[J]. Acta Optica Sinica, 2019, 39(6): 0607001

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