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Letteratura scientifica selezionata sul tema "Holographic image"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 9 febbraio 2022

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Articoli di riviste sul tema "Holographic image"

Fan, Fan, Xiaoyu Jiang, Xingpeng Yan, Jun Wen, Song Chen, Teng Zhang e Chao Han. "Holographic Element-Based Effective Perspective Image Segmentation and Mosaicking Holographic Stereogram Printing". Applied Sciences 9, n. 5 (4 marzo 2019): 920. http://dx.doi.org/10.3390/app9050920.

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Effective perspective image segmentation and mosaicking (EPISM) method is an effective holographic stereogram printing method, but a mosaic misplacement of reconstruction image occurred when focusing away from the reconstruction image plane. In this paper, a method known as holographic element-based effective perspective image segmentation and mosaicking is proposed. Holographic element (hogel) correspondence is used in EPISM method as pixel correspondence is used in direct-writing digital holography (DWDH) method to generate effective perspective images segments. The synthetic perspective image for holographic stereogram printing is obtained by mosaicking all the effective perspective images segments. Optical experiments verified that the holographic stereogram printed by the proposed method can provide high-quality reconstruction imagery and solve the mosaic misplacement inherent in the EPISM method.

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Wang, Yu Tian, Dong Sheng Wang e Wei Wei Pan. "The Analysis and Research on Digital Holography Signal Based on Wavelet Theory". Advanced Materials Research 216 (marzo 2011): 414–18. http://dx.doi.org/10.4028/www.scientific.net/amr.216.414.

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When introduce the wavelet theory to filter the hologram and the reconstructed image in the digital holography, the noise of the reconstructed image is greatly reduced. In the off-axis digital holography, the zero-order wave is decreased dramatically when after a wavelet filter, at the same time, the speckle noise is also reduced, and it turns out that the resolution of the reconstruction image is improved greatly. The system launches the research thoroughly on the three-dimensional body digital holographic technology, from the theory to the application, from the simulation to the experiment, and has elaborated and analyzed each characteristic of three-dimensional body digital holographic technology. It proposes many kinds of improved effective method of three-dimensional body digital holographic restructuring information, and finally has effectively explored the three-dimensional body digital holographic technology application through the experiment.

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Gizon, Laurent, Damien Fournier, Dan Yang, Aaron C. Birch e Hélène Barucq. "Signal and noise in helioseismic holography". Astronomy & Astrophysics 620 (dicembre 2018): A136. http://dx.doi.org/10.1051/0004-6361/201833825.

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Context. Helioseismic holography is an imaging technique used to study heterogeneities and flows in the solar interior from observations of solar oscillations at the surface. Holographic images contain noise due to the stochastic nature of solar oscillations. Aims. We aim to provide a theoretical framework for modeling signal and noise in Porter–Bojarski helioseismic holography. Methods. The wave equation may be recast into a Helmholtz-like equation, so as to connect with the acoustics literature and define the holography Green’s function in a meaningful way. Sources of wave excitation are assumed to be stationary, horizontally homogeneous, and spatially uncorrelated. Using the first Born approximation we calculated holographic images in the presence of perturbations in sound-speed, density, flows, and source covariance, as well as the noise level as a function of position. This work is a direct extension of the methods used in time-distance helioseismology to model signal and noise. Results. To illustrate the theory, we compute the holographic image intensity numerically for a buried sound-speed perturbation at different depths in the solar interior. The reference Green’s function is obtained for a spherically-symmetric solar model using a finite-element solver in the frequency domain. Below the pupil area on the surface, we find that the spatial resolution of the holographic image intensity is very close to half the local wavelength. For a sound-speed perturbation of size comparable to the local spatial resolution, the signal-to-noise ratio is approximately constant with depth. Averaging the image intensity over a number N of frequencies above 3 mHz increases the signal-to-noise ratio by a factor nearly equal to the square root of N. This may not be the case at lower frequencies, where large variations in the holographic signal are due to the contributions from the long-lived modes of oscillation.

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Khan, Aamir, Zhang Zhijiang, Yingjie Yu, Muhammad Amir Khan, Ketao Yan e Khizar Aziz. "GAN-Holo: Generative Adversarial Networks-Based Generated Holography Using Deep Learning". Complexity 2021 (21 gennaio 2021): 1–7. http://dx.doi.org/10.1155/2021/6662161.

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Current development in a deep neural network (DNN) has given an opportunity to a novel framework for the reconstruction of a holographic image and a phase recovery method with real-time performance. There are many deep learning-based techniques that have been proposed for the holographic image reconstruction, but these deep learning-based methods can still lack in performance, time complexity, accuracy, and real-time performance. Due to iterative calculation, the generation of a CGH requires a long computation time. A novel deep generative adversarial network holography (GAN-Holo) framework is proposed for hologram reconstruction. This novel framework consists of two phases. In phase one, we used the Fresnel-based method to make the dataset. In the second phase, we trained the raw input image and holographic label image data from phase one acquired images. Our method has the capability of the noniterative process of computer-generated holograms (CGHs). The experimental results have demonstrated that the proposed method outperforms the existing methods.

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Zhang, Tong, Ichirou Yamaguchi e Hywel Morgan. "Digital Holographic Microscopy". Microscopy and Microanalysis 5, S2 (agosto 1999): 362–63. http://dx.doi.org/10.1017/s1431927600015130.

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We applied phase-shifting digital holography to microscopy in this paper. At first lensless microscopy is proposed, in which no optical adjustment is necessary. Then, the method is applied to relax the limitation of focal depth in traditional optical microscopy. A theory for image formation and experimental verification using a few specimens are described.keywords: microscopy, digital holography, phase shiftingDue to the finite focal depth of an imaging lens, a limitation to normal optical microscopy-is that, only the 2-dimensional (2-D) information of an object can be obtained at one time. Besides, it is not convenient for quantitative analysis the observed image. Optical sectioning microscopy (OSM) and scanning confocal microscopy (SCM) which use opto-electronic detection have been proposed for quantitative analysis of a 3-D object. However, the former requires critical mechanical adjustment, while the latter uses timeconsuming mechanical 3-D scanning. Holographic microscopy can solve these problems because it can record 3-D information at one time. But, the chemical processing of holograms and the mechanical focusing at the reconstructed images cause more or less trouble. A 3-D imaging technique without use of photographic recording called optical scanning holography has recently been reported. However, there are also some trouble owing to the twin-image noise.

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Tahara, Tatsuki, Reo Otani e Yasuhiro Takaki. "Wavelength-Selective Phase-Shifting Digital Holography: Color Three-Dimensional Imaging Ability in Relation to Bit Depth of Wavelength-Multiplexed Holograms". Applied Sciences 8, n. 12 (28 novembre 2018): 2410. http://dx.doi.org/10.3390/app8122410.

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The quality of reconstructed images in relation to the bit depth of holograms formed by wavelength-selective phase-shifting digital holography was investigated. Wavelength-selective phase-shifting digital holography is a technique to obtain multiwavelength three-dimensional (3D) images with a full space-bandwidth product of an image sensor from wavelength-multiplexed phase-shifted holograms and has been proposed since 2013. The bit resolution required to obtain a multiwavelength holographic image was quantitatively and experimentally evaluated, and the relationship between wavelength resolution and dynamic range of an image sensor was numerically simulated. The results indicate that two-bit resolution per wavelength is required to conduct color 3D imaging.

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Khan, Javed I., e David Y. Y. Yun. "Holographic image archive". Computerized Medical Imaging and Graphics 20, n. 4 (luglio 1996): 243–57. http://dx.doi.org/10.1016/s0895-6111(96)00017-1.

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Semenov, Vladimir. "Registration of the dispersed composition of aerosol media by the holographic method". E3S Web of Conferences 279 (2021): 02001. http://dx.doi.org/10.1051/e3sconf/202127902001.

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The article describes a device based on the holographic method for measuring the parameters of dispersed aerosols. In the proposed device, the measured particle is irradiated with two beams perpendicular to the main radiation axis, while the resulting holographic image in each of the projections gives an increased amount of information (in contrast to existing solutions) about the parameters of the particles. The information obtained is processed layer by layer using digital holography methods to form a volumetric representation of the aerosol under study, which significantly increases the information content of measurements in comparison with existing devices. Methods and algorithms for layer-by-layer processing of the obtained holographic images are described, which make it possible to reconstruct the parameters of aerosols of complex shapes. The design of the device and an algorithm for layer-by-layer reconstruction of aerosol images are proposed.

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Crenshaw. "The Dynamic Display of Art Holography". Arts 8, n. 3 (19 settembre 2019): 122. http://dx.doi.org/10.3390/arts8030122.

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Holograms have been displayed in single-artist and group exhibitions, since the late 1960’s. The content within a holographic image can be greatly compromised if the hologram is not displayed correctly. Holography exhibitions can either enhance or diminish the impact of the images depending on how the exhibit layout and lighting are designed. This paper looks at art holography from the exhibition installation perspective and offers methods for assuring dynamic displays.

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Kochańska, Paula Adrianna, e Michal Makowski. "Compression of computer-generated holograms in image projection". Photonics Letters of Poland 9, n. 2 (1 luglio 2017): 60. http://dx.doi.org/10.4302/plp.v9i2.719.

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Computer-generated holography is a technique of a lossless and lens-less forming of images. Methods that use local devices to compute such holograms are very power- and time-consuming. In order to make it possible to transfer the calculations to the cloud, it is necessary to elaborate efficient algorithms of a lossless compression. In this paper two methods of compression are presented and supported by both simulation and experimental results. A lossy compression method omitting certain bit-planes of the holographic data is also presented, which allows insignificant loss of information, while achieving a greater compression ratio. Full Text: PDF ReferencesM. Makowski "Simple holographic projection in color.", Opt. Express 20, 25130-25136 (2012). CrossRef M. Makowski, I. Ducin, K. Kakarenko, J. Suszek, A. Kowalczyk, "Performance of the 4k phase-only spatial light modulator in image projection by computer-generated holography, " Phot. Lett. Poland 8, 26-28 (2016). CrossRef A. Kowalczyk, M. Bieda, M. Makowski, I. Ducin, K. Kakarenko, J. Suszek, A. Sobczyk, "Analysis of computational complexity in holographic lens-less projection," Phot. Lett. Poland 6, 84-86 (2014). CrossRef M. Makowski, "Minimized speckle noise in lens-less holographic projection by pixel separation," Opt. Express 21, 29205-29216 (2013). CrossRef H. Niwase, N. Takada, H. Araki, Y. Maeda, M. Fujiwara, H. Nakayama, T. Kakue, T. Shimobaba, T. Ito "Real-time electroholography using a multiple-graphics processing unit cluster system with a single spatial light modulator and the InfiniBand network." Opt. Eng. 55, 093108-093108 (2016). CrossRef T. Shimobaba and T. Ito, "Random phase-free computer-generated hologram", Opt. Express 23(7) 9549-9554 (2015) CrossRef S.R. Kodituwakku, "Comparison of lossless data compression algorithms for text data", Indian Journal of Computer Science and Engineering Vol 1 No 4 416-426 (2010) DirectLink

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Tesi sul tema "Holographic image"

Kim, Taegeun. "Optical Three-Dimensional Image Matching Using Holographic Information". Diss., Virginia Tech, 2000. http://hdl.handle.net/10919/28362.

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We present a three-dimensional (3-D) optical image matching technique and location extraction techniques of matched 3-D objects for optical pattern recognition. We first describe the 3-D matching technique based on two-pupil optical heterodyne scanning. A hologram of the 3-D reference object is first created and then represented as one pupil function with the other pupil function being a delta function. The superposition of each beam modulated by the two pupils generates a scanning beam pattern. This beam pattern scans the 3-D target object to be recognized. The output of the scanning system gives out the 2-D correlation of the hologram of the reference object and that of the target object. When the 3-D image of the target object is matched with that of the reference object, the output of the system generates a strong correlation peak. This theory of 3-D holographic matching is analyzed in terms of two-pupil optical scanning. Computer simulation and optical experiment results are presented to reinforce the developed theory. The second part of the research concerns the extraction of the location of a 3-D image matched object. The proposed system basically performs a correlation of the hologram of a 3-D reference object and that of a 3-D target object, and hence 3-D matching is possible. However, the system does not give out the depth location of matched 3-D target objects directly because the correlation of holograms is a 2-D correlation and hence not 3-D shift invariant. We propose two methods to extract the location of matched 3-D objects directly from the correlation output of the system. One method is to use the optical system that focuses the output correlation pattern along depth and arrives at the 3-D location at the focused location. However, this technique has a drawback in that only the location of 3-D targets that are farther away from the 3-D reference object can be extracted. Thus, in this research, we propose another method in which the extraction of a location for a matched 3-D object is possible without the aforementioned drawback. This method applies the Wigner distribution to the power fringe-adjusted filtered correlation output to extract the 3-D location of a matched object. We analyze the proposed method and present computer simulation and optical experiment results.
Ph. D.

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Yang, Hui. "Data extraction in holographic particle image velocimetry". Thesis, Loughborough University, 2004. https://dspace.lboro.ac.uk/2134/35012.

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Holographic Particle Image Velocimetry (HPIV) is potentially the best technique to obtain instantaneous, three-dimensional, flow field information. Several researchers have presented their experimental results to demonstrate the power of HPIV technique. However, the challenge to find an economical and automatic means to extract and process the immense amount of data from the holograms still remains. This thesis reports on the development of complex amplitude correlation as a means of data extraction. At the same time, three-dimensional quantitative measurements for a micro scale flow is of increasing importance in the design of microfluidic devices. This thesis also reports the investigation of HPIV in micro-scale fluid flow. The author has re-examined complex amplitude correlation using a formulation of scalar diffraction in three-dimensional vector space.

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Plaisted, Parker Bennett. "An investigation of point image analysis for evaluating holographic image quality /". Online version of thesis, 1993. http://hdl.handle.net/1850/11878.

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Earls, Craig P. "Holographic particle image velocimetry : computational simulation and reconstruction". Thesis, Springfield, Va. : Available from National Technical Information Service, 1999. http://handle.dtic.mil/100.2/ADA372219.

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Thesis (Degree of Naval Engineer and M.S. in Aerospace Engineering) Massachusetts Institute of Technology, June 1999.
"June 1999". Includes bibliographical references (leaves 77-79). Also available online.

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Holzbach, Mark. "Three-dimensional image processing for synthetic holographic stereograms". Thesis, Massachusetts Institute of Technology, 1986. http://hdl.handle.net/1721.1/14767.

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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Architecture, 1987.
Bibliography: leaves 54-55.
A digital image processing technique is presented that allows conventionally produced images to be prepared for undistorted printing in one-step holographic stereograms. This technique effectively predistorts the source 2D image set for a holographic stereogram to compensate for the distorting effects of its display geometry. The resulting stereograms can have undistort ed images that occupy space in front, back, and through the hologram surface. This technique is much more convenient that the current alternatives which either require unusual large optics, or much more intensive use of computer resources. It should therefore facilitate the fast and convenient production of one-step stereograms which are excellent 3D hardcopy displays with potential for applications that require fast visual communication of complex 3D information.
by Mark Holzbach.
M.S.

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Earls, Craig P. (Craig Paul) 1967. "Holographic particle image velocimetry : computational simulation and reconstruction". Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/80189.

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Thesis (Nav.E.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1999.
Includes bibliographical references (leaves 78-80).
by Craig P. Earls.
S.M.
Nav.E.

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Miller, Bo E., e Yuzuru Takashima. "Cavity enhanced image recording for holographic data storage". SPIE-INT SOC OPTICAL ENGINEERING, 2016. http://hdl.handle.net/10150/622715.

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Previously, we proposed and experimentally demonstrated that optical cavities can be employed in recording and readout of plane wave holograms to improve data rates in Holographic Data Storage Systems (HDSS). However, there were some concerns about whether these techniques would be applicable to page based HDSS where signal beams are image bearing and have multiple wave vectors. We have consequently demonstrated cavity enhanced writing of image bearing holograms in Fe: LiNbO3 with a 532 nm wavelength, CW, single mode, DPSS, Nd: YAG, laser with a cavity on the reference arm. The diffraction efficiency was monitored by pseudo-phase-conjugate readout during the recording process. Additionally, standing wave cavity recording was described as inappropriate to HDSS due to introducing additionally gratings to the recording process. The balancing of these grating strengths is analyzed relative to a trade-off in dynamic range consumption vs. data rates and the elimination of the extra gratings via quarter wave plates and isotropic recording media is proposed.

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McKeague, Thomas Anderson. "Holographic particle image velocimetry of ink jet streams". Thesis, Durham University, 2015. http://etheses.dur.ac.uk/10997/.

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Ink jet technology is a rapidly growing and diverse field of research. Ink jets are used to deliver very precise and small (picolitre) volumes of fluid to a surface. Recent advances in ink jet technology demand a better understanding of the dynamics of the fluid during jetting. The aim of this project was to design a method capable of measuring the flow velocities inside ink jet streams. This objective has been achieved by the use of digital holographic particle image velocimetry. The difficulty with measuring flows inside tightly curved samples is that the refractive index change over the boundary leads to an optical distortion and therefore particles cannot be viewed or tracked reliably. Optical distortion is compensated for by taking advantage of the ability to replay a holographically recorded wave. The light scattered by particles is propagated numerically back through the sample’s surface, to form a three-dimensional image in which all refractions at the interface have been accounted for. Three dimensional particle fields are then analysed using custom particle detection and correlation code to extract the displacement of individual particles between exposures, which facilitates the construction of full flow profiles. Holograms were recorded with a simple off-axis holographic microscope, comprising two point sources of divergent light, formed from the same objective lens, acting as the source of illumination and reference light, respectively. Experiments were conducted on continuous ink jet streams of water issuing from a nozzle with 100 µm diameter. For a few millimetres after the nozzle exit, the jet is cylindrical, it then starts to form swells and necks; the swells continue to grow at the expense of the necks until the jet breaks up into a stream of droplets. Measurements of the stream wise component of velocity have been successful in the cylindrical parts of the jet, in swells and in necks greater than 20 µm in diameter. To my knowledge measurements of particle velocities on fluid jets at this scale have not been accomplished previously.

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Degirmenci, Yilmaz. "Reasoning by analogy using holographic conceptual projection". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2002. http://library.nps.navy.mil/uhtbin/hyperion-image/02sep%5FDegirmenci.pdf.

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Wormald, S. Andrew. "Numerical techniques in digital microscopic holographic particle image velocimetry". Thesis, Loughborough University, 2010. https://dspace.lboro.ac.uk/2134/7140.

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Digital microscopic holographic particle image velocimetry (DµHPIV) is a technique which records scattered coherent light and uses it to measure displacement of particles in a fluid flow. The work in this thesis begins with the construction of a digital holographic microscope and explores the different possible methods of recording and holographic reconstruction, finding an off-axis forward-scatter geometry to be most suitable for the task. A comparison follows of methods to measure displacement in a sparsely seeded environment by performing a simple experiment. It finds that complex amplitude correlation performs significantly better than both intensity correlation and nearest neighbour analysis; the two other possible methods of displacement tracking. Later, an experiment is performed to investigate the behaviour of a microfluidic blood separator. The separator is intended to remove blood plasma from whole blood without other contaminants such as red blood cells and without the need for expensive laboratory equipment. In this chapter a new technique, higher order correlation, is introduced which can be used to strengthen the peaks in correlations of three or more particle images in a flow, and a potential flow CFD model of the separator is built from scratch to predict whether the separator will work, and against which the results can be compared. Finally, there is an experiment carried out which for the first time allows aberration free imaging within objects with irregular, highly curved surfaces; in this case optical fibres and inkjet droplets, by numerically reconstructing the droplet surface.

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Libri sul tema "Holographic image"

Digital holographic microscopy: Principles, techniques, and applications. New York: Springer, 2011.

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Earls, Craig P. Holographic particle image velocimetry: Computational simulation and reconstruction. Springfield, Va: Available from National Technical Information Service, 1999.

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Kocher, Clive Joseph. A study of the effects of processing chemistry on the holographic image space. Brighton: Brighton Polytechnic Department of Physical Sciences., 1988.

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Asundi, Anand. Digital holography for MEMS and microsystem metrology. Chichester, West Sussex, U.K: Wiley, 2011.

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1964-, Willert Christian E., e Kompenhans Jürgen 1946-, a cura di. Particle image velocimetry: A practical guide. Berlin: Springer, 1998.

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International Workshop on Automatic Processing of Fringe Patterns (1st 1989 Berlin, Germany). Fringe '89: Proceedings of the 1. International Workshop on Automatic Processing of Fringe Patterns held in Berlin (GDR), April 25-28, 1989. Berlin: Akademie-Verlag, 1989.

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International, Workshop on Automatic Processing of Fringe Patterns (1st 1989 Berlin Germany). Fringe '89: Proceedings of the I. International Workshop on Automatic Processing of Fringe Patterns held in Berlin (GDR), April 25-28, 1989. Berlin: Akademie-Verlag, 1989.

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Sato, Tomamasa. Synthetic aperture image holography. Woods Hole, Mass: Woods Hole Oceanographic Institution, 1985.

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Vasilenko, G. I. Image recognition by holography. New York: Consultants Bureau, 1989.

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1945-, Li Junchang, a cura di. Digital holography. London: ISTE, 2012.

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Capitoli di libri sul tema "Holographic image"

Kostuk, Raymond K. "Holographic Image Formation". In Holography, 65–92. Boca Raton, FL : CRC Press, Taylor & Francis Group, [2019] |: CRC Press, 2019. http://dx.doi.org/10.1201/9780429185830-4.

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Curtis, Kevin, Lisa Dhar e Pierre-Alexandre Blanche. "Holographic Data Storage Technology". In Optical and Digital Image Processing, 227–50. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2011. http://dx.doi.org/10.1002/9783527635245.ch11.

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Kim, Myung K. "Suppression of DC and Twin-Image Terms". In Digital Holographic Microscopy, 85–94. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-7793-9_7.

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Giordano, Austin, Lionel T. Keene, Ryan Norris e Fu-Pen Chiang. "Holography and Holographic Interferometry via Photopolymer Film". In Advancement of Optical Methods & Digital Image Correlation in Experimental Mechanics, 51–54. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-59773-3_5.

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Blanche, Pierre-Alexandre. "Holographic Visualization of 3D Data". In Optical and Digital Image Processing, 201–26. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2011. http://dx.doi.org/10.1002/9783527635245.ch10.

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Royer, H., N. Pérenne, M. Stanislas e R. C. Monnier. "Holographic PIV for Large Scale Facilities". In Particle Image Velocimetry: Recent Improvements, 333–49. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-642-18795-7_24.

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Bruckstein, Alfred M., Robert J. Holt e Arun N. Netravali. "Holographic image representations: The Fourier transform method". In Image Analysis and Processing, 30–37. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/3-540-63508-4_102.

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Schempp, Walter. "Holographic Image Coding and Neurocomputer Architectures". In Recent Advances in Fourier Analysis and Its Applications, 507–59. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0665-5_30.

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Kim, KyuTae, JongWeon Kim, JungSoo Lee e JongUk Choi. "Holographic Image Watermarking for Secure Content". In Trust and Privacy in Digital Business, 219–31. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-30079-3_23.

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Mikaelian, A. L., A. N. Palagushkin e S. A. Prokopenko. "Holographic Optics for Beamsplitting and Image Multiplication". In Springer Series in OPTICAL SCIENCES, 96–110. Berlin, Heidelberg: Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-540-48886-6_8.

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Atti di convegni sul tema "Holographic image"

Pu, Ye, Lujie Cao e Hui Meng. "Fundamental Issues and Latest Development in Holographic Particle Image Velocimetry". In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-33171.

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Holographic PIV (HPIV) is currently the most promising technique for truly instantaneous, three-dimensional (3D), three-component (3C) velocity field measurements for complex flows including turbulent and multiphase flows. This paper reports new understanding on some fundamental issues and challenges in HPIV including the complex 3D imaging characteristics, the extraction of full particle information (intensities, sizes, and locations) in 3D space, the extraction of particle displacements, and the huge data volume to process. The latest off-axis HPIV system will be presented, which incorporates the new understanding of imaging characteristics of particle holography, careful development of data processing algorithms, and a well-designed distributed parallel processing system. We will demonstrate capabilities of HPIV by a semi-time-series measurement of instantaneous 3D, 3C velocity fields in highly 3D vortical flow.

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Crostack, Horst-Artur, E. H. Meyer e Klaus-Juergen Pohl. "Digital image processing of holographic soundfield images". In San Diego - DL tentative, a cura di Ryszard J. Pryputniewicz. SPIE, 1992. http://dx.doi.org/10.1117/12.135337.

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Milgram, Jerome H. "Computational holographic image reconstruction". In Electronic Imaging 2002, a cura di Stephen A. Benton, Sylvia H. Stevenson e T. John Trout. SPIE, 2002. http://dx.doi.org/10.1117/12.469257.

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Barnhart, Donald H., George C. Papen e Ronald J. Adrian. "Holographic particle image velocimetry". In LkForest 91, a cura di Tung H. Jeong. SPIE, 1992. http://dx.doi.org/10.1117/12.57819.

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Miller, Nick, Bradley Duncan e Matthew P. Dierking. "Digital holographic image synthesis". In LEOS 2008 - 21st Annual Meeting of the IEEE Lasers and Electro-Optics Society (LEOS 2008). IEEE, 2008. http://dx.doi.org/10.1109/leos.2008.4688717.

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Markov, Vladimir B. "Holographic image printing system". In IS&T/SPIE 1994 International Symposium on Electronic Imaging: Science and Technology, a cura di Stephen A. Benton. SPIE, 1994. http://dx.doi.org/10.1117/12.172654.

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Park, Dae-Youl, e Jae-Hyeung Park. "Holographic Display using Volume Holographic Recording Medium". In 3D Image Acquisition and Display: Technology, Perception and Applications. Washington, D.C.: OSA, 2018. http://dx.doi.org/10.1364/3d.2018.jw4a.1.

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Ko, Kathryn, Ronald R. Erickson e John M. Webster. "Holography and the virtual patient: the holographic medical image". In International Conference on Holography and Optical Information Processing, a cura di Guoguang Mu, Guofan Jin e Glenn T. Sincerbox. SPIE, 1996. http://dx.doi.org/10.1117/12.263106.

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Schempp, Walter. "Holographic Grids". In Visual Communications and Image Processing '88: Third in a Series, a cura di T. Russell Hsing. SPIE, 1988. http://dx.doi.org/10.1117/12.968944.

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Nomura, Takanori, Kazuyoshi Itoh e Yoshiki Ichioka. "Incoherent-Holographic Hybrid Image Processing". In Holography '89, a cura di Yuri N. Denisyuk e Tung H. Jeong. SPIE, 1990. http://dx.doi.org/10.1117/12.963875.

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Rapporti di organizzazioni sul tema "Holographic image"

Khoury, Jehad, e Mark Cronin-Golomb. Real Time Holographic Image Processing. Fort Belvoir, VA: Defense Technical Information Center, novembre 1996. http://dx.doi.org/10.21236/ada408111.

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Hamad, Abdulatif Y., e James P. Wicksted. Holographic Image Storage in Eu(3+)-Doped Alkali-Aluminosilicate Glasses. Fort Belvoir, VA: Defense Technical Information Center, gennaio 1998. http://dx.doi.org/10.21236/ada391470.

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Rebane, Aleksander. Ultrafast Holographic Image Recording by Single Shot Femtosecond Spectral Hole Burning. Fort Belvoir, VA: Defense Technical Information Center, novembre 2001. http://dx.doi.org/10.21236/ada398192.

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Rebane, Aleksander. Ultrafast Holographic Image Recording by Single Shot Femtosecond Spectral Hole Burning. Fort Belvoir, VA: Defense Technical Information Center, maggio 2001. http://dx.doi.org/10.21236/ada389022.

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Katz, Joseph, e Charles Meneveau. Instrumentation for 2D and 3D Holographic Particle Image Velocimetry in Axial Turbomachines. Fort Belvoir, VA: Defense Technical Information Center, febbraio 1998. http://dx.doi.org/10.21236/ada381937.

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Len, P. M., J. D. Denlinger, E. Rotenberg, S. D. Kevan, B. P. Tonner, Y. Chen, M. A. Van Hove e C. S. Fadley. Holographic atomic images from surface and bulk W(110) photoelectron diffraction data. Office of Scientific and Technical Information (OSTI), aprile 1997. http://dx.doi.org/10.2172/603518.

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