1 July 1994 Real-time optical image processing using difference-of-Gaussians wavelets
Author Affiliations +
Optical Engineering, 33(7), (1994). doi:10.1117/12.172409
Abstract
A hybrid optical/electronic image processing system is proposed for the real-time implementation of a wavelet transform. Specifically, the difference-of-Gaussians (DOG) wavelet is synthesized in the hybrid system and used to process an input object. In the implementation, two laser beams with different temporal frequencies are first generated by an acousto-optic modulator. The two optical beams are then combined spatially and used to scan and process the object. The scattered light from the object is then picked up by a photodetector. The photodetector's electrical output signal, after appropriate electronic filtering, represents a scanned and processed version of the original object and can be sent to a monitor for real-time display or to a digital storage device for possible further processing. Because the proposed hybrid system is based on optical scanning, it is an incoherent system and hence has a much better signal-to-noise ratio (SNR) as compared with its coherent counterpart. Experimental results are presented and are shown to be in excellent agreement with computer simulations.
Ting-Chung Poon, Kwongchoi Caisy Ho, "Real-time optical image processing using difference-of-Gaussians wavelets," Optical Engineering 33(7), (1 July 1994). http://dx.doi.org/10.1117/12.172409
JOURNAL ARTICLE
7 PAGES


SHARE
KEYWORDS
Wavelets

Spatial light modulators

Signal processing

Wavelet transforms

Image processing

Photodetectors

Gaussian beams

RELATED CONTENT

Mobile multi-flash photography
Proceedings of SPIE (March 07 2014)
Interpolation for nonlinear Retinex-type algorithms
Proceedings of SPIE (January 29 2007)
Wavelet-based tool for medical image compression
Proceedings of SPIE (May 01 1992)
Artistic halftoning: between technology and art
Proceedings of SPIE (December 21 1999)

Back to Top