Results 21 to 30 of about 5,651,449 (268)
A digital hologram-based encryption and compression method for 3D models
Frontiers in Physics, 2022 This study proposes a novel method to compress and decompress the 3D models for safe transmission and storage. The 3D models are first extracted to become 3D point clouds, which would be classified by the K-means algorithm.
Yukai Sun +7 more
doaj +1 more source
Limited-memory BFGS Optimisation of Phase-Only Computer-Generated Hologram for Fraunhofer Diffraction [PDF]
, 2022 We implement a novel limited-memory Broyden-Fletcher-Goldfarb-Shanno (L-BFGS) optimisation algorithm with cross entropy (CE) loss function, to produce phase-only computer-generated hologram (CGH) for holographic displays, with validation on a binary ...
Kadis, Andrew +3 more
core +4 more sources
Nonlinear computer-generated holograms [PDF]
Optics Letters, 2011 We propose a novel technique for arbitrary wavefront shaping in quadratic nonlinear crystals by introducing the concept of computer-generated holograms (CGHs) into the nonlinear optical regime. We demonstrate the method experimentally showing a conversion of a fundamental Gaussian beam pump light into the first three Hermite-Gaussian beams at the ...
Asia, Shapira, Irit, Juwiler, Ady, Arie
openaire +2 more sources
QUALITY ASSESSMENT OF BINARY OBJECT IMAGES RECONSTRUCTED BY COMPUTER-GENERATED HOLOGRAMS [PDF]
Научно-технический вестник информационных технологий, механики и оптики, 2020 Subject of Research.The paper considers the issues of objective quality assessment of computer-generated Fresnel holograms and reconstructed binary object images. Method.The work is performed by the method of projection holographic photolithography based
Sergey N. Koreshev +3 more
doaj +1 more source
Computer-generated holography with ordinary display
, 2023 We propose a method of computer-generated holography (CGH) using incoherent light emitted from a mobile phone screen. In this method, we suppose a cascade of holograms in which the first hologram is a color image displayed on the mobile phone screen. The
Makoto Naruse (3388922) +2 more
core +1 more source
Perceptually motivated loss functions for computer generated holographic displays
Scientific Reports, 2022 Understanding and improving the perceived quality of reconstructed images is key to developing computer-generated holography algorithms for high-fidelity holographic displays.
Fan Yang +5 more
doaj +1 more source
MICROSTRUCTURE FORMATION ON THE BASIS OF COMPUTER GENERATED HOLOGRAM [PDF]
, 2011 Implementation of computer-generated hologram of the emblem of Kaunas University of Technology by means of Fourier transformation from greyscale image, and transferring of the hologram to PMMA using elec-tronic lithography are analyzed in this paper ...
A. Palevičius +11 more
core +1 more source
A Content Hiding Method for Digital Hologram Using Multiple Fresnel Diffraction
Applied Sciences, 2020 A digital hologram (DH) is so highly valued that it needs to be protected from exposure to an unpermitted person, which could be done by a content encryption.
Young-Ho Seo +2 more
doaj +1 more source
Binary Computer-Generated Holograms by Simulated-Annealing Binary Search
Photonics, 2022 The binary computer-generated hologram (BCGH) has attracted much attention recently because it can address the high-speed binary spatial light modulator (SLM), such as a digital micromirror device (DMD) SLM.
Jung-Ping Liu, Chen-Ming Tsai
doaj +1 more source
Pixel Level Depth Estimation in Computer Generated Holograms
, 2023 International audiencePixel Level Depth Estimation in Computer Generated ...
Madali, Nabil +3 more
core +2 more sources