Image Edge Enhancement with Two Cascaded Acousto-Optic Cells with Contrapropagating Sound

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TR Number
Date
1998-02-01
Journal Title
Journal ISSN
Volume Title
Publisher
Optical Society of America
Abstract

Basic real-time programmable image-processing operations are accomplished by use of acousto-optic (AO) cells. Instead of frequency-plane filters, the AO cells are placed directly behind the object. The one-dimensional edge-enhancement results with one AO cell can be improved by use of two AO cells that are placed in tandem with contrapropagating sound. The dominant second-derivative operation obtained from the transfer function of the undiffracted order works like a one-dimensional Laplacian operator that enables improved edge enhancement. (C) 1998 Optical Society of America.

Description
Keywords
Bragg-diffraction
Citation
Dongqing Cao, Partha P. Banerjee, and Ting-Chung Poon, "Image Edge Enhancement with Two Cascaded Acousto-Optic Cells with Contrapropagating Sound," Appl. Opt. 37, 3007-3014 (1998). doi: 10.1364/ao.37.003007