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Proceedings Paper

Extraction of three-dimensional shape information from a digital hologram
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Paper Abstract

We present a technique to convert a digital hologram of a three-dimensional (3D) object into a cloud of surface points in 3D space. Two depth-from-defocus techniques are used to generate a depth map for a particular reconstructed perspective of the object encoded in the digital hologram. The Fresnel transform is used to effect defocus, and a histogram-based approach is used to determine the degree of defocus for each neighborhood of pixels. Our experiments involve simulated and real-world objects (captured using phase-shift digital interferometry). The technique could be used in registration and 3D object recognition applications.

Paper Details

Date Published: 10 September 2005
PDF: 12 pages
Proc. SPIE 5908, Optical Information Systems III, 590805 (10 September 2005); doi: 10.1117/12.617503
Show Author Affiliations
C. P. Mc Elhinney, National Univ. of Ireland, Maynooth (Ireland)
J. Maycock, National Univ. of Ireland, Maynooth (Ireland)
T. J. Naughton, National Univ. of Ireland, Maynooth (Ireland)
J. B. McDonald, National Univ. of Ireland, Maynooth (Ireland)
B. 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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