Results 181 to 190 of about 1,217,682 (246)

Inverse problem approaches for digital hologram reconstruction

SPIE Proceedings, 2011
Digital holography (DH) is being increasingly used for its time-resolved three-dimensional (3-D) imaging capabilities. A 3-D volume can be numerically reconstructed from a single 2-D hologram. Applications of DH range from experimental mechanics, biology, and fluid dynamics.
Fournier, Corinne, Denis, Loïc, Thiébaut, Éric, Fournel, Thierry, Seifi, Mozhdeh   +4 more
openaire   +3 more sources

Hologram reconstruction by use of optical wavelet transform

Applied Optics, 1999
High-speed in-line holography is used to visualize the trajectories of glass fibers being drawn out in a turbulent flame. To improve the signal-to-noise ratio, the images are not observed by a conventional reconstruction setup, but the holographic plate is placed directly on the input plane of a wavelet-transform optical system.
D, Lebrun, S, Belaïd, C, Ozkul
openaire   +3 more sources

Digital hologram reconstruction algorithm based on the Fractional Fourier transform in non-telecentric digital holographic microscopy.

Optics Letters, 2023
A hologram reconstruction algorithm is proposed based on the fractional Fourier transform (FRFT) in non-telecentric digital holographic microscopy. The optimal fractional order representing the recorded hologram is estimated based on an evaluation metric.
Harshal Chaudhari, Rishikesh Kulkarni, P. K. Sundaravadivelu, Rajkumar P. Thummer, M. Bhuyan   +4 more
semanticscholar   +1 more source

Microwave hologram reconstruction for cylindrical geometry

Achievements of Modern Radioelectronics, 2021
Microwave imaging is a technique for evaluation of hidden or embedded objects in an optically opaque structure (or media) using electromagnetic waves in microwave regime.
V. Razevig, A. Ivashov, A. Bugaev
semanticscholar   +1 more source

Advantages of Phase Modulating MEMS for Full 3D Hologram Scene Reconstruction

Digital Holography and 3-D Imaging 2022, 2022
Phase LCOS are established for hologram reconstruction but also have drawbacks. MEMS can have superior modulation quality. An analysis of modulation errors and their impact on hologram reconstruction for full 3d holographic scenes is demonstrated.
T. Wagner, N. Leister, H. Sahm, Steffen Zozgornik, M. Teich, J. Pleikies, H. Stolle   +6 more
semanticscholar   +1 more source

Fast DCT-based image convolution algorithms and application to image resampling and hologram reconstruction

Proceedings of SPIE, 2010
Leonid P Yaroslavsky
exaly   +2 more sources

Shot Noise and Fixed-Pattern Noise Effects on Digital Hologram Reconstruction

, 2020
Digital holography allows registering and reconstructing information about 3D objects and 3D scenes. There are several limitations related to reconstructed image quality: speckle noise, twin images, zero order, light (shot noise) and dark temporal noise,
P. Cheremkhin, N. Evtikhiev, V. Krasnov, V. Rodin, R. Starikov   +4 more
semanticscholar   +1 more source

Sectional hologram reconstruction through complex deconvolution

, 2020
We propose a sectional hologram reconstruction method through complex deconvolution. By taking into account of both amplitude and phase (or real and imaginary parts) of wavefront propagation into the inverse problem model, we can perform more robust and ...
N. Chen, E. Lam, T. Poon, Byoungho Lee
semanticscholar   +1 more source

Digital recording and reconstruction of holograms in hologram interferometry and shearography

Applied Optics, 1994
The fundamentals of digital recording and mathematical reconstruction of Fresnel holograms are described. The object is recorded in two different states, and the holograms are stored electronically with a charge-coupled-device detector. In the process of reconstruction the digitally sampled holograms are applied to the different coherent optical ...
U, Schnars, W P, Jüptner
openaire   +2 more sources

A Hologram Reconstruction Algorithm for Landmine Recognition and Classification Based on Microwave Holographic Radar Data

Progress in Electromagnetics Research Symposium, 2018
We have developed a stand-off holographic subsurface radar (HSR)operating at 2 GHz with amplitude and phase outputs for detection and classification of buried shallow objects, including plastic landmines.
G. Borgioli, L. Bossi, Lorenzo Capineri, P. Falorni, T. Bechtel, F. Crawford, M. Inagaki, G. Pochanin, V. Ruban, L. Varyanitza-Roschupkina, T. Ogurtsova   +10 more
semanticscholar   +1 more source