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Proceedings Paper

Independent component analysis applied to digital holograms of three-dimensional objects
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Paper Abstract

We have successfully applied Independent Component Analysis to the removal of background speckle noise from digital holograms. Additive noise removal techniques do not perform well on speckle, which is better characterized as multiplicative noise. In addition, speckle contains 3D information and so cannot be removed completely. We use a blind source separation approach to the reduction of speckle noise in digital holograms. Independent Component Analysis computes a linear transformation of a multi-dimensional distribution that minimizes the statistical dependence between the components. It can be seen as an extension of principal component analysis where the transformed bases do not need to be orthonormal. Although a linear technique, we show how Independent Component Analysis can be applied to the reduction of background speckle in digital holograms. We have captured our digital holograms of three-dimensional objects using phase-shift digital interferometry. In addition, the technique can be extended and applied to segmentation and pattern recognition problems on digital holograms of three-dimensional objects. Results are provided using simulated and optical data.

Paper Details

Date Published: 10 September 2005
PDF: 9 pages
Proc. SPIE 5908, Optical Information Systems III, 590806 (10 September 2005); doi: 10.1117/12.617441
Show Author Affiliations
Jonathan Maycock, National Univ. of Ireland, Maynooth (Ireland)
Conor P. Mc Elhinney, National Univ. of Ireland, Maynooth (Ireland)
John B. McDonald, National Univ. of Ireland, Maynooth (Ireland)
Thomas J. Naughton, National Univ. of Ireland, Maynooth (Ireland)
Bahram Javidi, Univ. of Connecticut (United States)

Published in SPIE Proceedings Vol. 5908:
Optical Information Systems III
Bahram Javidi; Demetri Psaltis, Editor(s)

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