Optical image encryption with a bit-plane separation method in phase-shifting digital holography

Wen Chen, Chenggen Quan, Cho Jui Tay

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

1 Citation (Scopus)


In this paper, we propose a method for optical image encryption based on fractional Fourier transform (FRFT) and Arnold transform (ART) in phase-shifting digital holography. An input image is first divided into eight bit planes, and each bit plane is encrypted based on double random-phase masks and FRFT. Complex amplitude for the object is retrieved by phase-shifting digital holography in the hologram plane. The real and imaginary parts of the retrieved complex amplitudes for the 0th-7th bit planes are further encrypted using ART algorithm. Numerical results are shown to demonstrate the feasibility and effectiveness of the proposed technique. The sensitivity of security parameters, such as function orders in FRFT and iteration number in ART method, is also analyzed.
Original languageEnglish
Title of host publicationFourth International Conference on Experimental Mechanics
Publication statusPublished - 1 Dec 2010
Externally publishedYes
Event4th International Conference on Experimental Mechanics - Singapore, Singapore
Duration: 18 Nov 200920 Nov 2009


Conference4th International Conference on Experimental Mechanics


  • Arnold transform (ART)
  • Bit plane
  • Double random-phase masks
  • Fractional Fourier transform (FRFT)
  • Phase-shifting digital holography

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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