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Proceedings Paper

Dyadic-shift-based image processing
Author(s): Roman Castaneda; Javier Gonzalez; Kenneth Cabrera
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Paper Abstract

The dyadic shift-based image processing uses the address permutation of the individual pixels or the permutation of their gray levels or both by means of the XOR operation. It is properly described within the framework of the two-dimensional Walsh functions and Walsh transforms. The dyadic shift procedures allow the transformation of the original image and its posterior recovery without information loss by simply performing further permutations. In addition, comparison of particular features of different images can be achieved by applying dyadic correlations, which in turn can also take advantage of the Walsh transforms. Therefore, the dyadic shift-based image processing has potential applications on image encryption, image enhancement and filtering and pattern recognition among others.

Paper Details

Date Published: 26 August 2004
PDF: 11 pages
Proc. SPIE 5566, Optical Security and Safety, (26 August 2004); doi: 10.1117/12.577157
Show Author Affiliations
Roman Castaneda, Univ. Nacional de Colombia Sede Medellin (Colombia)
Javier Gonzalez, Univ. Nacional de Colombia Sede Medellin (Colombia)
Kenneth Cabrera, Univ. Nacional de Colombia Sede Medellin (Colombia)

Published in SPIE Proceedings Vol. 5566:
Optical Security and Safety
Zbigniew Jaroszewicz; Ewa Powichrowska; Mariusz Szyjer, Editor(s)

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