25 April 2006 Compression of phase-shifting digital holography interference patterns
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Proceedings Volume 6187, Photon Management II; 61870Y (2006); doi: 10.1117/12.663081
Event: SPIE Photonics Europe, 2006, Strasbourg, France
Abstract
The improved reconstruction quality that phase-shifting interferometry digital holography offers compared to conventional digital holography comes with an extra computation cost, increased recording complexity and additional data storage demands. The compression techniques that have been proposed to date aim at compressing the complex wavefront at the plane of the recording camera. We propose data compression at an earlier stage of the phase-shifting procedure that may lead to enhanced compression rates. More specifically we propose the compression of the interference patterns which are input to the phase-shifting algorithm. These interferograms are gray scale images making possible the use of standard image compression techniques for their compression. We investigate the use of baseline JPEG, JPEG-2000 and Set Partitioning in Hierarchical Trees for their compression. In order to verify the use of the proposed methods we apply them to real holographic data and compare their performance with other coding techniques that have been proposed in the literature. The study reveals that the proposed methods not only outperforms existing techniques in terms of compression performance but also they offer additional advantages including increased flexibility into the choice of the compression parameters as well as increased compatibility.
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Emmanouil Darakis, John J. Soraghan, "Compression of phase-shifting digital holography interference patterns", Proc. SPIE 6187, Photon Management II, 61870Y (25 April 2006); doi: 10.1117/12.663081; https://doi.org/10.1117/12.663081
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KEYWORDS
Wavefronts

Digital holography

Image compression

Quantization

Holograms

Holography

CCD cameras

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