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Applied Optics

Applied Optics


  • Vol. 37, Iss. 14 — May. 10, 1998
  • pp: 3007–3014

Image edge enhancement with two cascaded acousto-optic cells with contrapropagating sound

Dongqing Cao, Partha P. Banerjee, and Ting-Chung Poon  »View Author Affiliations

Applied Optics, Vol. 37, Issue 14, pp. 3007-3014 (1998)

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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.

© 1998 Optical Society of America

OCIS Codes
(070.1060) Fourier optics and signal processing : Acousto-optical signal processing
(070.6760) Fourier optics and signal processing : Talbot and self-imaging effects
(100.1160) Image processing : Analog optical image processing
(100.2980) Image processing : Image enhancement

Original Manuscript: June 10, 1997
Revised Manuscript: January 20, 1998
Published: May 10, 1998

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)

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