文献类型： 会议论文

第一作者： Melania Paturzo

作者： Melania Paturzo ¹ ; Bahrain Javidi ² ; Paolo Antonio Netti ³ ; Pietro Ferraro ¹ ; Pasquale Memmolo ³ ;

作者机构： 1.CNR-Istituto di Cibernetica "E Caianiello", via Campi Flegrei 34, 80078 Pozzuoli (Napoli), Italy

2.ECE Department, University of Connecticut, U-157, Storrs, Connecticut 06269, USA.

3.Center for Advanced Biomaterials for Health Care@CRIB, Istituto Italiano di Tecnologia, Largo Barsanti e Matteucci 53, 80125 Napoli, Italy

关键词： Digital holography;Sparsity measure;Refocusing criterion

会议名称： SPIE Conference on Optical Measurement Systems for Industrial Inspection

主办单位：

页码： 95250J-1-95250J-5

摘要： Sparsity properties of digital holograms have been investigated for application in compressive holography, permitting the discovery of the sparsest reconstruction plane in which the recovery of digital holograms is suitable. Recent approaches for denoising and phase retrieval are also proposed exploiting the sparsity properties of digital holograms. Thus it can be shown a strong correlation between holograms sparsity and focal plane detection, making a sparsity measure coefficient as a candidate to be used for focus plane calculation. Here we implement different sparsity metrics, that are able to measure a degree of sparsity of reconstructed digital hologram and we investigate their relation with the automatic focusing criterions, highlighting the possibility to use a sparsity measure as refocusing metric as well as the contrary, i.e. using image contrast coefficients as sparsity measures. Our analysis will be reported for digital holograms recorded in both lensless and microscope configuration and for both amplitude and pure-phase objects.

分类号： n532