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.
- URL: http://bigwww.epfl.ch/publications/vandeville0404.html
- URL: http://bigwww.epfl.ch/publications/vandeville0404.ps
Keywords: Image Scrambling
Record created on 2005-11-30, modified on 2016-08-08