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Applied Optics

Applied Optics


  • Vol. 44, Iss. 7 — Mar. 1, 2005
  • pp: 1216–1225

Effects of quantization in phase-shifting digital holography

Godfrey A. Mills and Ichirou Yamaguchi  »View Author Affiliations

Applied Optics, Vol. 44, Issue 7, pp. 1216-1225 (2005)

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We discuss quantization effects of hologram recording on the quality of reconstructed images in phase-shifting digital holography. We vary bit depths of phase-shifted holograms in both numerical simulation and experiments and then derived the complex amplitude, which is subjected to Fresnel transformation for the image reconstruction. The influence of bit-depth limitation in quantization has been demonstrated in a numerical simulation for spot-array patterns with linearly varying intensities and a continuous intensity object. The objects are provided with uniform and random phase modulation. In experiments, digital holograms are originally recorded at 8 bits and the bit depths are changed to deliver holograms at bit depths of 1 to 8 bits for the image reconstruction. The quality of the reconstructed images has been evaluated for the different quantization levels.

© 2005 Optical Society of America

OCIS Codes
(040.1490) Detectors : Cameras
(040.1520) Detectors : CCD, charge-coupled device
(090.2880) Holography : Holographic interferometry
(100.2000) Image processing : Digital image processing
(110.3000) Imaging systems : Image quality assessment
(120.5050) Instrumentation, measurement, and metrology : Phase measurement

Original Manuscript: August 31, 2004
Revised Manuscript: November 8, 2004
Manuscript Accepted: November 9, 2004
Published: March 1, 2005

Godfrey A. Mills and Ichirou Yamaguchi, "Effects of quantization in phase-shifting digital holography," Appl. Opt. 44, 1216-1225 (2005)

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