Results 191 to 200 of about 1,184,514 (267)

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

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

Computational Reconstruction of Images from Holograms

Applied Optics, 2002
The equations to reconstruct an image plane from a hologram are developed. This development is carried out for planes parallel to the hologram, which allows fast computation through the use of fast Fourier transforms. Algorithms for a digital computer are developed so images can be reconstructed, both with and without the Fresnel approximation, from a ...
Jerome H, Milgram, Weichang, Li
openaire   +2 more sources

Reflection hologram for reconstructing deep images

Optics Letters, 1997
A method to record deep and blurless images as a reflection hologram is proposed. A slit was used in the recording process in the same manner as for a rainbow hologram. The reconstructed image was monocolor and could be observed from wide longitudinal angles when it was illuminated by an extended white-light source such as a fluorescent lamp.
Y, Taketomi, T, Kubota
openaire   +2 more sources

Large image reconstruction using small holograms

Applied Optics, 1989
Large image reconstruction using a factor of 5 smaller hologram is realized with an optical system which consists of two Fresnel lenses and one common lens. The secondary Fresnel lens also serves as a projection screen. Furthermore, using the same optical system, a true color hologram is achieved by using three primary color lasers.
C S, Lh, Y W, Zhang, M J, Chang, L Q, Xiang   +3 more
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

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

Forward reconstruction from reflection holograms

Journal of Optics, 1982
Reflection holograms have been recorded which reconstruct equally bright images both in reflection as well as in transmission. Possible reasons for this dual behavior of the reflection holograms have been explored.
P C Mehta, R Hradaynath
openaire   +1 more source

Generative adversarial neural network for 3D-hologram reconstruction

Laser Physics Letters
Neural-network-based reconstruction of digital holograms can improve the speed and the quality of micro- and macro-object images, as well as reduce the noise and suppress the twin image and the zero-order.
S. A. Kiriy, Dmitry A. Rymov, A. S. Svistunov, A. Shifrina, R. Starikov, P. Cheremkhin   +5 more
semanticscholar   +1 more source