Image Scrambling without Bandwidth Expansion

Image-scrambling schemes are designed to render the image content unintelligible. Wyner has proposed an elegant one-dimensional (1-D) scrambling scheme without bandwidth expansion, making use of the discrete prolate spheroidal sequences (DPSS). The DPSS are optimal regarding their energy concentration in a given frequency subband. In this paper, we propose the two-dimensional (2-D) extension and application of this algorithm. We discuss new possibilities introduced by the 2-D approach. We also include experimental results.


Published in:
IEEE Transactions on Circuits and Systems for Video Technology, 14, 6, 892–897
Year:
2004
Publisher:
IEEE
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 Record created 2005-11-30, last modified 2018-12-03

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