Scalable image scrambling method using unified constructive permutation function on diagonal blocks

Kok Sheik Wong, Kiyoshi Tanaka

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

5 Citations (Scopus)


In this paper, an extension of ScaScra [1] is proposed to scal-ably scramble an image in the diagonal direction for achieving distorted scanline-like effect. The non-overlapping diagonal blocks are first defined and the unified constructive permutation function is applied to scramble pixels in each diagonal block. Scalability in scrambling is achieved by varying the block size. Experiments were carried out to objectively and subjectively verify the basic performance of the proposed extension and compare them to the results of ScaScra by using standard test images. Evaluations on pixel correlation and entropy are also carried out to verify the performance of both ScaScra and the proposed extension.

Original languageEnglish
Title of host publication28th Picture Coding Symposium, PCS 2010
Number of pages4
Publication statusPublished - 2010
Externally publishedYes
EventInternational Picture Coding Symposium 2010 - Nagoya, Japan
Duration: 8 Dec 201010 Dec 2010
Conference number: 28th (Proceedings)


ConferenceInternational Picture Coding Symposium 2010
Abbreviated titlePCS 2010
Internet address


  • Diagonal block
  • Image encryption
  • Scalable scrambling
  • UCPF

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