Optimal key mask design for optical encryption based on joint transform correlator architecture

Li Chien Lin, Chau Jern Cheng

Research output: Contribution to journalArticle

13 Citations (Scopus)


We examine perfect recovery in the optical encryption system based on joint transform correlator architecture, which requires the key mask to be space-limited and phase-only in the frequency domain. Accordingly, a discrete sinc function interpolation is used to generate a binary phase difference mask for image encryption and decryption. Furthermore, the optimal binary phase difference mask is derived from the interpolation process best approximating the ideal sinc function interpolation. The simulation results confirm better recovery of the decrypted image for applying the proposed key masks to the optical encryption system. Especially, the optimal binary phase difference mask significantly enhances the recovery performance.

Original languageEnglish
Pages (from-to)144-154
Number of pages11
JournalOptics Communications
Issue number2
Publication statusPublished - 2006 Feb 15



  • Joint transform correlator
  • Optical encryption
  • Sinc interpolation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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