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Dong J, Jia S, Yu H. Hybrid method for speckle noise reduction in digital holography. JOURNAL OF THE OPTICAL SOCIETY OF AMERICA. A, OPTICS, IMAGE SCIENCE, AND VISION 2019; 36:D14-D22. [PMID: 31873362 DOI: 10.1364/josaa.36.000d14] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Accepted: 08/30/2019] [Indexed: 06/10/2023]
Abstract
In digital holography, the inherited speckle noise degrades imaging quality due to the coherent laser source. To overcome this problem, a hybrid method for speckle noise reduction is presented by combining a novel angular diversity approach with the block-matching and 3D filtering (BM3D) algorithm. A serial of holograms is first captured by the proposed recording approach, and then the image with high signal-to-noise ratio is obtained by averaging multiple reconstructed intensity images. Finally, the residual noise in the averaged image is further eliminated by the BM3D filtering algorithm. The speckle noise is significantly suppressed, and a nearly speckle-free image can be obtained. Experimental results demonstrate the effectiveness of the proposed method.
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Bianco V, Memmolo P, Leo M, Montresor S, Distante C, Paturzo M, Picart P, Javidi B, Ferraro P. Strategies for reducing speckle noise in digital holography. LIGHT, SCIENCE & APPLICATIONS 2018; 7:48. [PMID: 30839600 PMCID: PMC6106996 DOI: 10.1038/s41377-018-0050-9] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Revised: 06/01/2018] [Accepted: 06/05/2018] [Indexed: 05/05/2023]
Abstract
Digital holography (DH) has emerged as one of the most effective coherent imaging technologies. The technological developments of digital sensors and optical elements have made DH the primary approach in several research fields, from quantitative phase imaging to optical metrology and 3D display technologies, to name a few. Like many other digital imaging techniques, DH must cope with the issue of speckle artifacts, due to the coherent nature of the required light sources. Despite the complexity of the recently proposed de-speckling methods, many have not yet attained the required level of effectiveness. That is, a universal denoising strategy for completely suppressing holographic noise has not yet been established. Thus the removal of speckle noise from holographic images represents a bottleneck for the entire optics and photonics scientific community. This review article provides a broad discussion about the noise issue in DH, with the aim of covering the best-performing noise reduction approaches that have been proposed so far. Quantitative comparisons among these approaches will be presented.
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Affiliation(s)
- Vittorio Bianco
- CNR-ISASI Istituto di Scienze Applicate e Sistemi Intelligenti “E. Caianiello”, via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy
| | - Pasquale Memmolo
- CNR-ISASI Istituto di Scienze Applicate e Sistemi Intelligenti “E. Caianiello”, via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy
| | - Marco Leo
- CNR-ISASI Istituto di Scienze Applicate e Sistemi Intelligenti “E. Caianiello”, via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy
| | - Silvio Montresor
- Université du Maine, CNRS UMR 6613, LAUM, Avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France
| | - Cosimo Distante
- CNR-ISASI Istituto di Scienze Applicate e Sistemi Intelligenti “E. Caianiello”, via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy
| | - Melania Paturzo
- CNR-ISASI Istituto di Scienze Applicate e Sistemi Intelligenti “E. Caianiello”, via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy
| | - Pascal Picart
- Université du Maine, CNRS UMR 6613, LAUM, Avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France
| | - Bahram Javidi
- Electrical and Computer Engineering Department, University of Connecticut, U-4157, Storrs, CT 06269 USA
| | - Pietro Ferraro
- CNR-ISASI Istituto di Scienze Applicate e Sistemi Intelligenti “E. Caianiello”, via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy
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Bianco V, Memmolo P, Paturzo M, Finizio A, Javidi B, Ferraro P. Quasi noise-free digital holography. LIGHT, SCIENCE & APPLICATIONS 2016; 5:e16142. [PMID: 30167185 PMCID: PMC6059929 DOI: 10.1038/lsa.2016.142] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Revised: 03/21/2016] [Accepted: 03/27/2016] [Indexed: 05/05/2023]
Abstract
One of the main drawbacks of Digital Holography (DH) is the coherent nature of the light source, which severely corrupts the quality of holographic reconstructions. Although numerous techniques to reduce noise in DH have provided good results, holographic noise suppression remains a challenging task. We propose a novel framework that combines the concepts of encoding multiple uncorrelated digital holograms, block grouping and collaborative filtering to achieve quasi noise-free DH reconstructions. The optimized joint action of these different image-denoising methods permits the removal of up to 98% of the noise while preserving the image contrast. The resulting quality of the hologram reconstructions is comparable to the quality achievable with non-coherent techniques and far beyond the current state of art in DH. Experimental validation is provided for both single-wavelength and multi-wavelength DH, and a comparison with the most used holographic denoising methods is performed.
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Affiliation(s)
- Vittorio Bianco
- Institute of Applied Sciences and Intelligent Systems ”E. Caianiello”, Italian National Research Council (ISASI-CNR), Via Campi Flegrei 34, 80078, Pozzuoli (Napoli), Italy
| | - Pasquale Memmolo
- Institute of Applied Sciences and Intelligent Systems ”E. Caianiello”, Italian National Research Council (ISASI-CNR), Via Campi Flegrei 34, 80078, Pozzuoli (Napoli), Italy
- E-mail:
| | - Melania Paturzo
- Institute of Applied Sciences and Intelligent Systems ”E. Caianiello”, Italian National Research Council (ISASI-CNR), Via Campi Flegrei 34, 80078, Pozzuoli (Napoli), Italy
| | - Andrea Finizio
- Institute of Applied Sciences and Intelligent Systems ”E. Caianiello”, Italian National Research Council (ISASI-CNR), Via Campi Flegrei 34, 80078, Pozzuoli (Napoli), Italy
| | - Bahram Javidi
- ECE Department, University of Connecticut, U-157, Storrs, Connecticut, 06269, USA
| | - Pietro Ferraro
- Institute of Applied Sciences and Intelligent Systems ”E. Caianiello”, Italian National Research Council (ISASI-CNR), Via Campi Flegrei 34, 80078, Pozzuoli (Napoli), Italy
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Memmolo P, Leo M, Distante C, Paturzo M, Ferraro P. Coding Color Three-Dimensional Scenes and Joining Different Objects by Adaptive Transformations in Digital Holography. ACTA ACUST UNITED AC 2015. [DOI: 10.1109/jdt.2015.2407615] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Memmolo P, Bianco V, Paturzo M, Javidi B, Netti PA, Ferraro P. Encoding multiple holograms for speckle-noise reduction in optical display. OPTICS EXPRESS 2014; 22:25768-25775. [PMID: 25401610 DOI: 10.1364/oe.22.025768] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In digital holography (DH) a mixture of speckle and incoherent additive noise, which appears in numerical as well as in optical reconstruction, typically degrades the information of the object wavefront. Several methods have been proposed in order to suppress the noise contributions during recording or even during the reconstruction steps. Many of them are based on the incoherent combination of multiple holographic reconstructions achieving remarkable improvement, but only in the numerical reconstruction i.e. visualization on a pc monitor. So far, it has not been shown the direct synthesis of a digital hologram which provides the denoised optical reconstruction. Here, we propose a new effective method for encoding in a single complex wavefront the contribution of multiple incoherent reconstructions, thus allowing to obtain a single synthetic digital hologram that show significant speckle-reduction when optically projected by a Spatial Light Modulator (SLM).
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