Results 1 to 10 of about 3,360 (241)

Acoustic Hologram Reconstruction With Unsupervised Neural Network

Frontiers in Materials, 2022
An acoustic hologram is crucial in various acoustics applications. The reconstruction accuracy of the acoustic field from the hologram is important for determining the performance of the acoustic hologram system.
Boyi Li, Mengyang Lu, Chengcheng Liu, Xin Liu, Xin Liu, Dean Ta, Dean Ta   +6 more
doaj   +3 more sources

Enhancing light efficiency in phase-only holograms via neural network [PDF]

Scientific Reports
Artificial neural networks have emerged as powerful tools for hologram synthesis and reconstruction, offering improvements in both image quality and computational efficiency.
Balakiruthika Periyasamy, Heeseong Hwang, Daeho Yang   +2 more
doaj   +2 more sources

Extended Field of View and Resolution Enhancement in Lensless Digital Holography [PDF]

Sensors
Lensless digital holography provides a simple, low-cost imaging platform with a large field of view (FOV) and quantitative phase capability, making it attractive for biomedical imaging, microstructure inspection, and large area imaging.
Chung-Hsuan Huang, Chih-Cheng Hsu, Huai-Che Chu, Chau-Jern Cheng, Han-Yen Tu   +4 more
doaj   +2 more sources

On Data Selection and Regularization for Underdetermined Vibro-Acoustic Source Identification [PDF]

Sensors
The number of hologram points in near-field acoustical holography (NAH) for a vibro-acoustic system plays a vital role in conditioning the transfer function between the source and measuring points.
Laixu Jiang, Jingqiao Liu, Xin Jiang, Yuezhao Pang   +3 more
doaj   +2 more sources

Randomness assisted in-line holography with deep learning

Scientific Reports, 2023
We propose and demonstrate a holographic imaging scheme exploiting random illuminations for recording hologram and then applying numerical reconstruction and twin image removal.
Manisha, Aditya Chandra Mandal, Mohit Rathor, Zeev Zalevsky, Rakesh Kumar Singh   +4 more
doaj   +1 more source

Verification of Polarization Matching on the Hologram Recording Plane for the Implementation of an Optimized Digital Hologram Printing System

Frontiers in Physics, 2022
Conventional studies on digital hologram printer have mainly been conducted on image generation and reconstruction such as multi-view image generation method, computer-generated hologram (CGH) and a method of displaying a wave-front for a 3D object ...
Leehwan Hwang, Jongho Jeong, Cheolyoung Go, Philippe Gentet, Jungho Kim, Soonchul Kwon, Seunghyun Lee   +6 more
doaj   +1 more source

Hologram synthesis for photorealistic reconstruction [PDF]

Journal of the Optical Society of America A, 2008
Computation of diffraction patterns, and thus holograms, of scenes with photorealistic properties is a highly complicated and demanding process. An algorithm, based primarily on computer graphics methods, for computing full-parallax diffraction patterns of complicated surfaces with realistic texture and reflectivity properties is proposed and tested ...
Janda, M., Hanák I., Onural L.
openaire   +4 more sources

Adaptive Digital Hologram Binarization Method Based on Local Thresholding, Block Division and Error Diffusion

Journal of Imaging, 2022
High-speed optical reconstruction of 3D-scenes can be achieved using digital holography with binary digital micromirror devices (DMD) or a ferroelectric spatial light modulator (fSLM). There are many algorithms for binarizing digital holograms.
Pavel A. Cheremkhin, Ekaterina A. Kurbatova, Nikolay N. Evtikhiev, Vitaly V. Krasnov, Vladislav G. Rodin, Rostislav S. Starikov   +5 more
doaj   +1 more source

EFFECT OF OBJECT REPRESENTATION FORM ON DEPTH RESOLUTION OF RESTORED IMAGES OBTAINED BY SYNTHESIZED FRESNEL HOLOGRAMS [PDF]

Научно-технический вестник информационных технологий, механики и оптики, 2019
Subject of the Research. The paper presents the study on the effect of object representation form on the depth resolution of images reconstructed via computer-generated Fresnel holograms-projectors. Method.
Sergey N. Koreshev, Marina A. Frolova
doaj   +1 more source

Inside the hologram: reconstructing the bulk observer’s experience

Journal of High Energy Physics, 2022
Abstract We develop a holographic framework for describing the experience of bulk observers in AdS/CFT, that allows us to compute the proper time and energy distribution measured along any bulk worldline. Our method is formulated directly in the CFT language and is universal: it does not require knowledge of the bulk geometry as an
Jafferis, Daniel L., Lamprou, Lampros
openaire   +4 more sources