Optical image compression and encryption methods

Ayman Alfalou

doi:10.1364/AOP.1.000589

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Optical image compression and encryption methods

2009-10-28

454

Ayman Alfalou

Christian Brosseau *

DOI：10.1364/AOP.1.000589

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Abstract

En 中文

Over the years extensive studies have been carried out to apply coherent optics methods in real-time communications and image transmission. This is especially true when a large amount of information needs to be processed, e. g., in high-resolution imaging. The recent progress in data-processing networks and communication systems has considerably increased the capacity of information exchange. However, the transmitted data can be intercepted by nonauthorized people. This explains why considerable effort is being devoted at the current time to data encryption and secure transmission. In addition, only a small part of the overall information is really useful for many applications. Consequently, applications can tolerate information compression that requires important processing when the transmission bit rate is taken into account. To enable efficient and secure information exchange, it is often necessary to reduce the amount of transmitted information. In this context, much work has been undertaken using the principle of coherent optics filtering for selecting relevant information and encrypting it. Compression and encryption operations are often carried out separately, although they are strongly related and can influence each other. Optical processing methodologies, based on filtering, are described that are applicable to transmission and/or data storage. Finally, the advantages and limitations of a set of optical compression and encryption methods are discussed. (C) 2009 Optical Society of America

Keywords:

SPATIAL LIGHT MODULATORS

RANDOM-PHASE ENCRYPTION

3-DIMENSIONAL OBJECT RECONSTRUCTION

INDEPENDENT COMPONENT ANALYSIS

JOINT TRANSFORM CORRELATOR

DIGITAL HOLOGRAMS

SECURING INFORMATION

FOURIER-TRANSFORM

BLIND SEPARATION

COMPOSITE FILTER