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Nonlinear Optical Image Processing with Bacteriorhodopsin FilmsThe transmission properties of some bacteriorhodopsin film spatial light modulators are uniquely suited to allow nonlinear optical image processing operations to be applied to images with multiplicative noise characteristics. A logarithmic amplitude transmission feature of the film permits the conversion of multiplicative noise to additive noise, which may then be linearly filtered out in the Fourier plane of the transformed image. The bacteriorhodopsin film displays the logarithmic amplitude response for write beam intensities spanning a dynamic range greater than 2.0 orders of magnitude. We present experimental results demonstrating the principle and capability for several different image and noise situations, including deterministic noise and speckle. Using the bacteriorhodopsin film, we successfully filter out image noise from the transformed image that cannot be removed from the original image.
Document ID
20020006316
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
Downie, John D.
(NASA Ames Research Center Moffett Field, CA United States)
Deiss, Ron
Date Acquired
August 20, 2013
Publication Date
January 1, 1994
Subject Category
Optics
Meeting Information
Meeting: Spatial Light Modulators and Applications Topical Meeting
Location: Salt Lake City, UT
Country: United States
Start Date: March 12, 1995
End Date: March 17, 1995
Funding Number(s)
PROJECT: RTOP 506-59-21
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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