Current Optics and Photonics

Optical Society of Korea (한국광학회)
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A Joint Transform Correlator Encryption System Based on Binary Encoding for Grayscale Images

  • Peng, Kaifei (Department of Opto-electronics Engineering, Shijiazhuang Campus, Army Engineering University) ;
  • Shen, Xueju (Department of Opto-electronics Engineering, Shijiazhuang Campus, Army Engineering University) ;
  • Huang, Fuyu (Department of Opto-electronics Engineering, Shijiazhuang Campus, Army Engineering University) ;
  • He, Xuan (Department of Opto-electronics Engineering, Shijiazhuang Campus, Army Engineering University)
  • Received : 2019.07.10
  • Accepted : 2019.09.10
  • Published : 2019.12.25
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Abstract

A binary encoding method for grayscale images is proposed to address their unsatisfactory decryption results from joint transform correlator (JTC) encryption systems. The method converts the encryption and decryption of grayscale images into that of binary images, and effectively improves decrypted-image quality. In the simulation, we replaced unencoded grayscale images with their binary encoded counterparts in the JTC encryption and decryption processes, then adopted a median filter to suppress saturation noise while keeping other settings unchanged. Accordingly, decrypted-image quality was clearly enhanced as the correlation coefficient (CC) between a decrypted image and its original rose from 0.8237 to 0.9473 initially, and then further to 0.9937, following the above two steps respectively. Finally, optical experimental results confirmed that the proposed encryption system works correctly.

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References

  1. P. Refregier and B. Javidi, "Optical image encryption based on input plane and Fourier plane random encoding," Opt. Lett. 20, 767-769 (1995). https://doi.org/10.1364/OL.20.000767
  2. J. Lang, "Image encryption based on the reality-preserving multiple-parameter fractional Fourier transform and chaos permutation," Opt. Lasers Eng. 50, 929-937 (2012). https://doi.org/10.1016/j.optlaseng.2012.02.012
  3. B. Javidi and T. Nomura, "Securing information by use of digital holography," Opt. Lett. 25, 28-30 (2000). https://doi.org/10.1364/OL.25.000028
  4. T. Nomura and B. Javidi, "Optical encryption using a joint transform correlator architecture," Opt. Eng. 39, 2031-2035 (2000). https://doi.org/10.1117/1.1304844
  5. E. Rueda, J. F. Barrera, R. Henao, and R. Torroba, "Optical encryption with a reference wave in a joint transform correlator architecture," Opt. Commun. 282, 3243-3249 (2009). https://doi.org/10.1016/j.optcom.2009.05.022
  6. D. Amaya, M. Tebaldi, R. Torroba, and N. Bolognini, "Wavelength multiplexing encryption using joint transform correlator architecture," Appl. Opt. 48, 2099-2104 (2009). https://doi.org/10.1364/AO.48.002099
  7. J. Liu, T. Bai, X. Shen, S. Dou, C. Lin, and J. Cai, "Parallel encryption for multi-channel images based on an optical joint transform correlator," Opt. Commun. 396, 174-184 (2017). https://doi.org/10.1016/j.optcom.2017.03.049
  8. J. M. Vilardy, M. S. Millan, and E. Perez-Cabre, "Nonlinear image encryption using a fully phase nonzero-order joint transform correlator in the Gyrator domain," Opt. Lasers Eng. 89, 88-94 (2017). https://doi.org/10.1016/j.optlaseng.2016.02.013
  9. J. F. Barrera, M. Tebaldi, E. Rueda, N. Bolognini, and R. Torroba, "Experimental multiplexing of encrypted movies using a JTC architecture," Opt. Express 20, 3388-3393 (2012). https://doi.org/10.1364/OE.20.003388
  10. L. C. Lin and C. J. Cheng, "Optimal key mask design for optical encryption based on joint transform correlator architecture," Opt. Commun. 258, 144-154 (2006). https://doi.org/10.1016/j.optcom.2005.08.007
  11. S. Xueju, L. Xumin, C. Ning, and C. Jianjun, "Nonlinear image encryption system based on JTC and its removing noise and resisting attack properties research," Chin. J. Lasers 42, 0709003 (2015). https://doi.org/10.3788/CJL201542.0709003
  12. S. Dou, X. Shen, B. Zhou, L. Wang, and C. Lin, "Experimental research on optical image encryption system based on joint Fresnel transform correlator," Opt. Laser Technol. 112, 56-64 (2019). https://doi.org/10.1016/j.optlastec.2018.11.004
  13. A. J. Osorio, J. F. B. Ramirez, S. Montoya, A. Mira-Agudelo, A. V. Zea, and R. Torrobab, "Improved decryption quality with a random reference beam cryptosystem," Opt. Lasers Eng. 112, 119-127 (2019). https://doi.org/10.1016/j.optlaseng.2018.09.006
  14. J. F. Barrera, A. Mira, and R. Torroba, "Optical encryption and QR codes: Secure and noise-free information retrieval," Opt. Express 21, 5373-5378 (2013). https://doi.org/10.1364/OE.21.005373
  15. S. Jiao, W. Zou, and X. Lia, "QR code based noise-free optical encryption and decryption of a gray scale image," Opt. Commun. 387, 235-240 (2017). https://doi.org/10.1016/j.optcom.2016.11.066
  16. J. Shuming, J. Zhi, and Z. Changyuan, "Is QR code an optimal data container in optical encryption systems from an error-correction coding perspective?," J. Opt. Soc. Am. A 35, A23-A29 (2018). https://doi.org/10.1364/JOSAA.35.000A23
  17. Y. Oin, Z. Wang, H. Wang, and Q. Gong, "Binary image encryption in a joint transform correlator scheme by aid of run-length encoding and QR code," Opt. Laser Technol. 103, 93-98 (2018). https://doi.org/10.1016/j.optlastec.2018.01.018
  18. A. Alfalou and C. Brosseau, "Optical image compression and encryption methods," Adv. Opt. Photonics 1, 589-636 (2009). https://doi.org/10.1364/AOP.1.000589
  19. L. Jie, B. Tingzhu, S. Xueju, D. Shuaifeng, L. Chao, and C. Qi, "Robustness analysis and optimization of parallel encryption system for multi-channel images in an optical joint transform correlator architecture," Acta Opt. Sin. 37, 120001 (2017). https://doi.org/10.3788/AOS201737.0120001