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Optimized two-step phase-shifting algorithm applied to image encryption

Peng Xiang He Wen-Qi Qin Wan Guo Ji-Ping Li A-Meng Cai Lü-Zhong Meng Xiang-Feng

Optimized two-step phase-shifting algorithm applied to image encryption

Peng Xiang, He Wen-Qi, Qin Wan, Guo Ji-Ping, Li A-Meng, Cai Lü-Zhong, Meng Xiang-Feng
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  • Abstract views:  4004
  • PDF Downloads:  1090
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  • Received Date:  09 November 2009
  • Accepted Date:  07 December 2009
  • Published Online:  15 September 2010

Optimized two-step phase-shifting algorithm applied to image encryption

  • 1. (1)College of Optoelectronics Engineering, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen 518060, China; (2)Department of Optics, School of Information Science and Engineering, Shandong University, Jinan 250100, China; (3)Department of Optics, School of Information Science and Engineering, Shandong University, Jinan 250100, China;College of Optoelectronics Engineering, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, She

Abstract: The two-step phase-shifting algorithm proposed previously is optimized, the original object wave field can be reconstructed by only one phase shift value in (0, π) and two interferograms, with the removal (or suppression) of background intensity (or dc term), and the additional measurements such as the object wave intensity, reference wave intensity, etc., are no longer required. Together with double random phase encoding technique in the Fresnel domain, the optimized two-step phase-shifting algorithm is then applied to image encryption system. The feasibility of the proposed scheme is verified by computer simulation. Furthermore, the sensitivity of geometrical keys has also been tested and analyzed.

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