Results 131 to 140 of about 1,184,514 (267)

Optical Reconstruction of Computer-Generated Holograms [PDF]

, 2009
Computer-generated holograms are used as optical elements in optical setups. This chapter analyses how methods of generating, encoding and recording computer-generated hologram affect the results of their optical reconstruction.
Leonid Yaroslavsky, Jaakko Astola
openaire   +1 more source

H2HSR: Hologram-to-Hologram Super-Resolution With Deep Neural Network

IEEE Access
In holography, the resolution of the hologram significantly impacts both display size and angle-of-view, yet achieving high-resolution holograms presents formidable challenges, whether in capturing real-world holograms or in the computational demands of ...
Youchan No, Jaehong Lee, Hanju Yeom, Sungmin Kwon, Duksu Kim   +4 more
doaj   +1 more source

Non-iterative 3D computer-generated hologram based on single full-support optimized random phase and phase compensation

New Journal of Physics
The main problem faced by traditional three-dimensional (3D) holographic displays is the time-consuming and poor flexibility of the hologram generation process.
Cheng Zhang, Peng Han, Jisen Shi, Hao Zhou, Quanbing Zhang, Hong Cheng, Chuan Shen, Fen Zhang, Chao Han, Sui Wei   +9 more
doaj   +1 more source

Influence of Intense Internal Waves Traveling Along an Acoustic Path on Source Holographic Reconstruction in Shallow Water

Journal of Marine Science and Engineering
This paper studies how intense internal waves (IIWs) affect the holographic reconstruction of the sound field generated by a moving source in a shallow-water environment.
Sergey Pereselkov, Venedikt Kuz’kin, Matthias Ehrhardt, Sergey Tkachenko, Alexey Pereselkov, Nikolay Ladykin   +5 more
doaj   +1 more source

Improving the quality of light-field data extracted from a hologram using deep learning

ETRI Journal
We propose a method to suppress the speckle noise and blur effects of the light field extracted from a hologram using a deep-learning technique. The light field can be extracted by bandpass filtering in the hologram's frequency domain.
Dae-youl Park, Joongki Park
doaj   +1 more source

A Deep Learning Framework for Multi-Plane Computer-Generated Holography

Photonics
Multi-plane computer-generated holography is a key technology for enabling volumetric and near-eye displays. However, its widespread adoption remains constrained by the high computational cost of phase optimization and the persistent issue of axial ...
Jiafeng Zeng, Yi Chen, Entong Kuang, Xinrui Li, Xiangsheng Xie, Qiang Wang   +5 more
doaj   +1 more source

U²-Net-Combined End-to-End Unsupervised Learning Method for Implementing Accurate Computer-Generated Phase-Only Hologram

IEEE Access
Holography is an emerging technology where phase-only spatial light modulator (SLM) is better than amplitude-only SLM because of its enhanced diffraction efficiency and rendering quality.
F. M. Fahmid Hossain, Hui-Ying Wu, Shariar Md Imtiaz, Md Biddut Hossain, Tuvshinjargal Amgalan, Rupali Kiran Shinde, Ki-Chul Kwon, Hyun-Eui Kim, Kwan-Hee Yoo, Nam Kim   +9 more
doaj   +1 more source

Dynamic holographic storage in lithium niobate [PDF]

A program was undertaken to improve the optical recording properties of LiNbO3 for holographic optical memory application. Iron, copper, and manganese doping were all found to increase the optical sensitivity of LiNbO3.
Aronson, H.
core   +1 more source

Three-Dimensional High-Resolution Digital Inline Hologram Reconstruction with a Volumetric Deconvolution Method. [PDF]

Sensors (Basel), 2018
Eom J, Moon S.
europepmc   +1 more source

Improving reconstructions of digital holograms

, 2012
Digital holography is a two step process of recording a hologram on an electronic sensor and reconstructing it numerically. This thesis makes a number of contributions to the second step of this process. These can be split into two distinct parts: A) speckle reduction in reconstructions of digital holograms (DHs), and B) modeling and overcoming partial
openaire   +2 more sources