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11 November 1998 Optical implementation of the wavelet transform using smart pixels
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Proceedings Volume 3581, Acousto-Optics and Applications III; (1998)
Event: Acousto-Optics and Applications III, 1998, Gdansk-Jurata, Poland
Wavelet transforms have found many practical applications in signal processing, including image processing, pattern recognition, and feature extraction. Since the wavelet transform is fundamentally given by the correlation of an input signal with a family of daughter wavelets, any real- time correlator can be used to implement the wavelet transform. Optical correlators are particularly well suited to this application, since the wavelet transform of a 1D signal produces a 2D wavelet transform. In this paper,w e discuss implementations of the wavelet transform using acousto-optic correlators and smart pixels as spatial light modulators. Smart pixels integrate both electronic processing and optical devices in a 2D array, which takes full advantage of the programmability of electronics and the parallel processing of optical devices. We describe a specific smart pixel implementation consisting of analog liquid crystal integrated on silicon 2.0-micrometers CMOS circuitry; and present experimental results of the wavelet transform implementation. An acousto-optic architecture for real-time wavelet correlators using this device will also be presented.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Daniel M. Litynski, Barry L. Shoop, Dirk A. Hall, Pankaj K. Das, and Casimer M. DeCusatis "Optical implementation of the wavelet transform using smart pixels", Proc. SPIE 3581, Acousto-Optics and Applications III, (11 November 1998);

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