Optical image encryption based on multistage fractional Fourier transforms and pixel scrambling technique

Jianlin Zhao, Hongqiang Lu, Xiaoshan Song, Jifeng Li, Yanghua Ma

Research output: Contribution to journalArticlepeer-review

76 Scopus citations

Abstract

A novel encryption for optical image based on multistage fractional Fourier transforms (FRTs) and pixel scrambling technique is presented in this paper. The principle of pixel scrambling is described and an optical approach to realize the pixel scrambling and decoding is also proposed. Numerical simulation results are given to verify the algorithm, and relative error (RE) between the decoded images and the original image versus the deviation of fractional orders is discussed. Comparing with single FRT encryption, the security using this method for optical image encryption is greatly improved due to the introduction of the pixel scrambling technique.

Original languageEnglish
Pages (from-to)493-499
Number of pages7
JournalOptics Communications
Volume249
Issue number4-6
DOIs
StatePublished - 15 May 2005

Keywords

  • Fractional Fourier transform
  • Image encryption
  • Optical pixel scrambling device
  • Pixel scrambling

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