Compression defects in different reconstructions from phase-shifting digital holographic data

Abstract

Three principal strategies for the compression of phase-shifting digital holograms (interferogram domain-, hologram domain-, and reconstruction domain-based strategies) are reviewed and their effects in the reconstruction domain are investigated. Images of the reconstructions are provided in order to visually compare the performances of the methods. In addition to single reconstructions we investigate the compression effects on different depth reconstructions and reconstructions corresponding to different viewing angles so that a range of the three-dimensional aspects of the holograms may be considered. Although comparable at low compression rates, we find that depth and perspective information is degraded in different ways with the different techniques at high compression rates. We use a hologram of an object with sufficient details at different depths so that both parallax and depth effects can be illustrated.

Keywords (OCIS): 050.5080 Phase shift, 090.1760 Computer holography, 090.2880 Holographic interferometry, 100.2000 Digital image processing, 110.3000 Image quality assessment

Copyright 2007 OSA. This paper was published in Applied Optics and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/abstract.cfm?msid=78106. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.