Hologram reconstruction by use of optical wavelet transform

Lebrun, Denis; Belaid, Samir; Özkul, Cafer

doi:10.1364/ao.38.003730

Cited by 33 publications

(12 citation statements)

References 16 publications

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“…Reconstructing an ehologram involves tracing the beam propagation through the system and calculating the diffraction pattern by means of a numerical representation of the physical process of diffraction. Many algorithms have been employed based on, for example, the Fresnel transform, [22][23][24] the Fraunhofer transform, 25 the wavelet transform, 26 and "Fresnelets" with wavelet bases. 27 The reconstruction algorithm used in our system is derived from the angular spectrum theory.…”

Section: Principle and Implementation Of Dhvmmentioning

confidence: 99%

Visualization of fast-moving cells in vivo using digital holographic video microscopy

et al. 2008

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Digital in-line holography offers some significant advantages over conventional optical holography and microscopy to image biological specimens. By combining holography with digital video microscopy, an in-line holographic video microscope is developed and is capable of recording spatial 3D holographic images of biological specimens, while preserving the time dimension. The system enables high-speed video recording of fast cell movement, such as the rapid movement of blood cells in the blood stream in vivo. This capability is demonstrated with observations of fast 3-D movement of live cells in suspension cultures in response to a gentle shake to the Petri dish. The experimental and numerical procedures are incorporated with a fast reconstruction algorithm for reconstruction of holographic video frames at various planes (z axis) from the hologram and along the time axis. The current system enables both lateral and longitudinal resolutions down to a few micrometers. Postreconstruction processing of background subtraction is utilized to eliminate noise caused by scattered light, thereby enabling visualization of, for example, blood streams of live Xenopos tadpoles. The combination of digital holography and microscopy offers unique advantages for imaging of fast moving cells and other biological particles in three dimensions in vivo with high spatial and temporal resolution.

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Section: Principle and Implementation Of Dhvmmentioning

confidence: 99%

Visualization of fast-moving cells in vivo using digital holographic video microscopy

et al. 2008

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“…In [42] and [43] it is shown how wavelets can be used for analysis and reconstruction of in-line holograms. In [42] the wavelet transform is used to reconstruct successive planes of a sample volume and find the 3D location of small particles.…”

Section: Waveletsmentioning

confidence: 99%

“…In [42] the wavelet transform is used to reconstruct successive planes of a sample volume and find the 3D location of small particles. The purpose of the work [43] is to determine the three-dimensional trajectories of glass fibers drawn out in a turbulent flame, and high-speed in-line holography is used to visualize the sample volume. With the help of wavelets a noiseless, selective, and fast reconstruction of the 3D field is performed.…”

Section: Waveletsmentioning

confidence: 99%

An overview of the holographic display related tasks within the European 3DTV Project

Onural

Özaktaş

Stoykova³

et al. 2006

SPIE Proceedings

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A European consortium has been working since September 2004 on all video-based technical aspects of threedimensional television. The group has structured its technical activities under five technical committees focusing on capturing 3D live scenes, converting the captured scenes to an abstract 3D representations, transmitting the 3D visual information, displaying the 3D video, and processing of signals for the conversion of the abstract 3D video to signals needed to drive the display. The display of 3D video signals by holographic means is highly desirable. Synthesis of high-resolution computer generated holograms with high spatial frequency content, using fast algorithms, is crucial. Fresnel approximation with its fast implementations, fast superposition of zonelens terms, look-up tables using pre-computed holoprimitives are reported in the literature. Phase-retrieval methods are also under investigation. Successful solutions to this problem will benefit from proper utilization and adaptation of signal processing tools like waveletes, fresnelets, chirplets, and atomic decompositions and various optimization algorithms like matching pursuit or simulated annealing.Keywords: 3DTV, holographic TV, dynamic holographic displays TECHNICAL SCOPE OF THE 3DTV PROJECTA European consortium has been working since September 2004 on all video-based technical aspects of threedimensional television (3DTV) [1]. The group has structured its technical activities under five technical committees. These technical committees are focusing on capturing 3D live scenes, converting the captured scenes to abstract 3D representations, transmitting the 3D visual information, displaying the 3D video, and processing of signals for the conversion of the abstract 3D video to signals needed to drive the display. The technical scope is kept rather wide: the researchers are investigating many different competing technologies for each one of the technical components of the overall 3DTV system in a comparative approach. Fig. 1 shows the main functional blocks.Multi-camera systems are quite popular among the alternative approaches to acquire 3D moving scene information. Typical multi-camera systems have 2-20 cameras providing synchronized video streams. Calibration is an issue. Typically, the images of a point in the 3D scene at an instant is located in more than one view captured by the cameras, and the true 3D physical coordinates are then computed from this information. Automated matching of feature points is a research topic. Holographic recording of 3D scene information using digital cameras is also under investigation as a candidate technology.Once the 3D geometry is captured, together with its color texture, the captured scene can be represented using various computer graphics techniques; for example, mesh polygons may be used. An important step is the compression and coding of the captured 3D motion pictures. Compression of 2D video has been well studied during the past three decades. However, extensions to stereo-video, or multi-view v...

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“…The function of Wigner distribution was used for the direct extraction of the threedimensional sites of an object from the hologram [5]. The wavelet transformation was used for the reconstructing the holograms [6,7]. Coetmellec and al.…”

Section: Introductionmentioning

confidence: 99%

Application Of The Fractional Fourier Transform To The Restitution Of The Holograms Of Particles Moving

Boucherit¹,

Bouamama²,

Zegadi³

et al. 2008

AIP Conference Proceedings

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Hologram reconstruction by use of optical wavelet transform

Cited by 33 publications

References 16 publications

Visualization of fast-moving cells in vivo using digital holographic video microscopy

Visualization of fast-moving cells in vivo using digital holographic video microscopy

An overview of the holographic display related tasks within the European 3DTV Project

Application Of The Fractional Fourier Transform To The Restitution Of The Holograms Of Particles Moving

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