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Proceedings Paper

Unsupervised orthogonalization neural network for image compression
Author(s): Lurng-Kuo Liu; Panos A. Ligomenides
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Paper Abstract

In this paper, we present a unsupervised orthogonalization neural network, which, based on Principal Component (PC) analysis, acts as an orthonormal feature detector and decorrelation network. As in the PC analysis, this network involves extracting the most heavily information- loaded features that contained in the set of input training patterns. The network self-organizes its weight vectors so that they converge to a set of orthonormal weight vectors that span the eigenspace of the correlation matrix in the input patterns. Therefore, the network is applicable to practical image transmission problems for exploiting the natural redundancy that exists in most images and for preserving the quality of the compressed-decompressed image. We have applied the proposed neural model to the problem of image compression for visual communications. Simulation results have shown that the proposed neural model provides a high compression ratio and yields excellent perceptual visual quality of the reconstructed images, and a small mean square error. Generalization performance and convergence speed are also investigated.

Paper Details

Date Published: 1 November 1992
PDF: 11 pages
Proc. SPIE 1826, Intelligent Robots and Computer Vision XI: Biological, Neural Net, and 3D Methods, (1 November 1992); doi: 10.1117/12.131602
Show Author Affiliations
Lurng-Kuo Liu, Univ. of Maryland/College Park (United States)
Panos A. Ligomenides, Univ. of Maryland/College Park (United States)


Published in SPIE Proceedings Vol. 1826:
Intelligent Robots and Computer Vision XI: Biological, Neural Net, and 3D Methods
David P. Casasent, Editor(s)

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