Optical logarithmic transformation of speckle images with bacteriorhodopsin films | Zendy

John D. Downie | Zendy

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Optical logarithmic transformation of speckle images with bacteriorhodopsin films

Author(s) -

John D. Downie

Publication year - 1995

Publication title -

optics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.524

H-Index - 272

eISSN - 1071-2763

pISSN - 0146-9592

DOI - 10.1364/ol.20.000201

Subject(s) - optics , speckle pattern , bacteriorhodopsin , transformation (genetics) , speckle noise , logarithm , materials science , physics , mathematics , mathematical analysis , biochemistry , chemistry , genetics , membrane , gene , biology

The application of logarithmic transformations to speckle images is sometimes desirable in converting the speckle noise distribution into an additive, constant-variance noise distribution. The optical transmission properties of some bacteriorhodopsin films are well suited to implement such a transformation optically in a parallel fashion. I present experimental results of the optical conversion of a speckle image into a transformed image with signalindependent noise statistics, using the real-time photochromic properties of bacteriorhodopsin. The original and transformed noise statistics are confirmed by histogram analysis.

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