Results 121 to 130 of about 3,360 (241)

The Firebrands Echo: National Fantasy as an Obstacle to Jean‐Luc Mélenchon's Populist Spectacle

Constellations, EarlyView.
Reid A. Kleinberg
wiley   +1 more source

Moiré Pattern Encoded Extended Fractional Fourier Transform Security Hologram

, 2008
This paper describes a simple method for making extended fractional Fourier transform (EFRT) based Moiré pattern encoded security holograms. These security holograms contain multifold concealed and encoded anticounterfeit security features that can only ...
Aggarwal, A.K., Chhachhia, D.P., Sharma, A.K.   +2 more
core   +1 more source

Visually lossless compression of digital hologram sequences [PDF]

, 2010
Digital hologram sequences have great potential for the recording of 3D scenes of moving macroscopic objects as their numerical reconstruction can yield a range of perspective views of the scene.
Näsänen, Risto, Naughton, Thomas J., Kowiel, Marcin, Darakis, Emmanouil   +3 more
core  

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

Automatização da medição de deslocamentos pela holografia interferométrica [PDF]

, 1984
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico.
Gonçalves Junior, Armando Albertazzi
core  

A Lamp for Hologram Reconstruction

Journal of the Illuminating Engineering Institute of Japan, 2001
Naoyoshi Nameda, G. Von Bally
openaire   +2 more sources

Dual beam encoded extended fractional Fourier transform security hologram with in-built repositioning

, 2008
This paper describes a simple method for making dual beam encoded ex-tended fractional Fourier transform (EFRT) security holograms. The hologram possesses different stages of encoding so that security features are concealed and remain invisible to the ...
Mahajan, C.G., Aggarwal, A.K., Chhachhia, D.P., Sharma, A.K.   +3 more
core  

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