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Model Implementation and Analysis of a True Three-dimensional Display System
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作者 Ye Tian Yang Yang +1 位作者 Han Yang Ze Ji 《Computer Systems Science & Engineering》 SCIE EI 2021年第12期403-414,共12页
To model a true three-dimensional(3D)display system,we introduced the method of voxel molding to obtain the stereoscopic imaging space of the system.For the distribution of each voxel,we proposed a four-dimensional(4D... To model a true three-dimensional(3D)display system,we introduced the method of voxel molding to obtain the stereoscopic imaging space of the system.For the distribution of each voxel,we proposed a four-dimensional(4D)Givone–Roessor(GR)model for state-space representation—that is,we established a local state-space model with the 3D position and one-dimensional time coordi-nates to describe the system.First,we extended the original elementary operation approach to a 4D condition and proposed the implementation steps of the realiza-tion matrix of the 4D GR model.Then,we described the working process of a true 3D display system,analyzed its real-time performance,introduced the fixed-point quantization model to simplify the system matrix,and derived the conditions for the global asymptotic stability of the system after quantization.Finally,we provided an example to prove the true 3D display system’s feasibility by simulation.The GR-model-representation method and its implementation steps proposed in this paper simplified the system’s mathematical expression and facilitated the microcon-troller software implementation.Real-time and stability analyses can be used widely to analyze and design true 3D display systems. 展开更多
关键词 true 3D display system method of voxel molding(MVM) Givone-Roessor(GR)model asymptotic stability Bounded-Input Bounded-Output(BIBO)stability real-time display
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Grid-based computer-generated holograms synthesizing for holographic three-dimensional display
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作者 陈国华 张爱军 《Journal of Beijing Institute of Technology》 EI CAS 2011年第3期415-420,共6页
To reduce the computing time of composite computer-generated holograms (CGHs) gen- eration based upon the angular projection algorithm for holographic three-dimensional (3D) display, a grid-based holographic displ... To reduce the computing time of composite computer-generated holograms (CGHs) gen- eration based upon the angular projection algorithm for holographic three-dimensional (3D) display, a grid-based holographic display ( GHD ) scheme was designed. The grid computing technology was applied to numerically process the different angular projections of an object in distributed-parallel manner to create the corresponding CGHs. The whole treatment of a projection was regarded as a job executed on the grid node machine. The number of jobs which were submitted to grid nodes, therefore, was equal to that of the projections of the object. A Condor-based grid testbed was constructed to verify the feasibility of the GHD scheme, and a graphical user interface (GUI) program and several service modules were developed for it. A 3D terrain model as an example was processed on the testbed. The result showed that the scheme was feasible and able to improve the execution elficiency greatly. 展开更多
关键词 computer-generated hologram (CGH) GRID three-dimensional (3D) display
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A generalized three-dimensional failure criterion for rock masses 被引量:5
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作者 Ashok Jaiswal B.K.Shrivastva 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE 2012年第4期333-343,共11页
The smooth convex generalized failure function, which represents 1/6 part of envelope in tile deviatoric plane, is proposed. The proposed function relies on four shape parameters (L, a, b and c), in which two parame... The smooth convex generalized failure function, which represents 1/6 part of envelope in tile deviatoric plane, is proposed. The proposed function relies on four shape parameters (L, a, b and c), in which two parameters (a and b) are dependent on the others. The parameter Ls is called extension ratio. The proposed failure function could be incorporated with any two-dimensional (2D) failure criteria to make it a three-dimensional (3D) version. In this paper, a mathematical formulation for incorporation of Hoek-Brown failure criterion with the proposed function is presented. The Hoek-Brown failure criterion is the most suited 2D failure criterion tbr geomaterials. Two types of analyses for best-fitting solution of published true tri-axial test data were made by considering (1) constant extension ratio and (2) variable extension ratio. The shape and strength parameters for different types of rocks have been determined by best-fitting the published true tri-axial test data for both the analyses. It is observed from the best-fitting solution by considering uniform extension ratio (L~) that shape constants have a correlation with Hoek-Brown strength parameters. Thus, only two parameters (c~. and m) are needed for representing the 3D failure criterion for intact rock. The statistical expression between shape and Hoek-Brown strength parameters is given. In the second analysis, when considering varying extension ratio, another parameterfis introduced. The modified extension ratio is related tofand extension ratio. The results at minimum mean misfit for all the nine rocks indicate that the range off varies from 0.7 to 1.0. It is found that mean misfit by considering varying extension ratio is lower than that in the first analysis. But it requires three parameters. A statistical expression betweenfand Hoek-Brown strength parameters has been established. Though coefficient of correlation is not reasonable, we may eliminate it as an extra parameter. At the end of the paper, a methodology has also been given for its application to isotropic jointed rock mass, so that it can be implemented in a numerical code for stability analysis of jointed rock mass structures. 展开更多
关键词 three-dimensional (3D) failure criterion Hoek-Brown failure criterion true tri-axial test deviatoric plane
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Three-dimensional FDEM numerical simulation of failure processes observed in Opalinus Clay laboratory samples 被引量:10
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作者 Omid Mahabadi Patrick Kaifosh +1 位作者 Paul Marschall Tim Vietor 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2014年第6期591-606,共16页
This study presents the first step of a research project that aims at using a three-dimensional (3D) hybridfinite-discrete element method (FDEM) to investigate the development of an excavation damaged zone(EDZ) ... This study presents the first step of a research project that aims at using a three-dimensional (3D) hybridfinite-discrete element method (FDEM) to investigate the development of an excavation damaged zone(EDZ) around tunnels in a clay shale formation known as Opalinus Clay. The 3D FDEM was first calibratedagainst standard laboratory experiments, including Brazilian disc test and uniaxial compression test. Theeffect of increasing confining pressure on the mechanical response and fracture propagation of the rockwas quantified under triaxial compression tests. Polyaxial (or true triaxial) simulations highlighted theeffect of the intermediate principal stress (s2) on fracture directions in the model: as the intermediateprincipal stress increased, fractures tended to align in the direction parallel to the plane defined by themajor and intermediate principal stresses. The peak strength was also shown to vary with changing s2. 2014 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting byElsevier B.V. All rights reserved. 展开更多
关键词 three-dimensional(3D) hybrid finitediscrete element method(FDEM) Intermediate principal stress Discrete element methods true triaxial behaviour Failure envelope
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VOLUMETRIC-SWEPT DISPLAY SYSTEM BASED ON HELIX ROTATING SCREEN AND DMD
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作者 岳键 赵晓庚 +2 位作者 邢建芳 潘文平 沈春林 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2011年第4期367-371,共5页
Based on the helix rotating screen and the digital micro-mirror device (DMD), the former proto of volumetric-swept display system is improved. The 3-D display system adopting a helix rotating screen to construct an ... Based on the helix rotating screen and the digital micro-mirror device (DMD), the former proto of volumetric-swept display system is improved. The 3-D display system adopting a helix rotating screen to construct an imaging space meliorate the defects, such as the smaller image space, the fewer voxels and the severer voxel overlap dead zone caused by planar rotating screen. DMD with spatial light modular (SLM) technology increases the transmission bandwidth of 3-D data in the voxel activation subsystem and activate multi-voxel once time. The volumetric-swept system based on helix rotating screen and DMD is developed. The experimental results show that the image space, the vision dead zone, the voxels on slice, and the voxel activation capacity of the designed proto are superior to the plane rotating screen system. 展开更多
关键词 true 3-D display volumetric 3-D display volumetric-swept display helix rotating screen digital micro-mirror device (DMD)
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Wide color gamut switchable autostereoscopic 3D display based on directional quantum-dot backlight 被引量:1
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作者 Bin Xu Xue-Ling Li Yuan-Qing Wang 《Chinese Physics B》 SCIE EI CAS CSCD 2019年第12期191-201,共11页
A switchable autostereoscopic 3-dimensional(3D) display device with wide color gamut is introduced in this paper. In conjunction with a novel directional quantum-dot(QD) backlight, the precise scanning control strateg... A switchable autostereoscopic 3-dimensional(3D) display device with wide color gamut is introduced in this paper. In conjunction with a novel directional quantum-dot(QD) backlight, the precise scanning control strategy, and the eye-tracking system, this spatial-sequential solution enables our autostereoscopic display to combine all the advantages of full resolution,wide color gamut, low crosstalk, and switchable 2D/3D. And also, we fabricated an autostereoscopic display prototype and demonstrated its performances effectively. The results indicate that our system can both break the limitation of viewing position and provide high-quality 3D images. We present two working modes in this system. In the spatial-sequential mode,the crosstalk is about 6%. In the time-multiplexed mode, the viewer should wear auxiliary and the crosstalk is about 1%,just next to that of a commercial 3D display(BENQ XL2707-B and View Sonic VX2268 WM). Additionally, our system is also completely compatible with active shutter glasses and its 3D resolution is same as its 2D resolution. Because of the excellent properties of the QD material, the color gamut can be widely extended to 77.98% according to the ITU-R recommendation BT.2020(Rec.2020). 展开更多
关键词 three-dimensional(3D) display directional and scanning quantum-dot backlight color gamut full resolution
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Swept-Volume Display System Based on Cylindrical Space Projection and Curved Reflectors
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作者 田丰 汪浩 +2 位作者 夏雪 张文俊 王鹤 《Journal of Donghua University(English Edition)》 EI CAS 2015年第4期672-676,694,共6页
In order to achieve a clear and steady swept-volume display,the method of swept-volume display based on cylindrical space projection was presented. One projector generated the image volume in π× 70 mm × 70 ... In order to achieve a clear and steady swept-volume display,the method of swept-volume display based on cylindrical space projection was presented. One projector generated the image volume in π× 70 mm × 70 mm × 150 mm space. Experimentally,the resolution of images was 800 pixel × 600 pixel × 360 pixel,which resulted in almost 345 million voxels. In order to achieve space voxels with uniform brightness, curved reflectors were also designed. In addition,the match conditions between triangles and the scanning planes in the volume space were classified and a sweptvolume graphics engine based on embedded platform was designed.The image rendering the hardware foundation for three-dimensional( 3D) dynamic images generation was achieved. Demonstrated in the experiments,light source utilization of the second-generation system based on curved mirror is about three times brighter than the firstgeneration 3D minitor based on flat mirror,and this system is able to display color,clear and well-proportioned 3D images in brighter room light. 展开更多
关键词 three-dimensional(3D) display swept-volume display cylindrical space VOXEL
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Latest development of display technologies
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作者 高洪跃 姚秋香 +7 位作者 刘攀 郑志强 刘吉成 郑华东 曾超 于瀛洁 孙涛 曾震湘 《Chinese Physics B》 SCIE EI CAS CSCD 2016年第9期1-8,共8页
In this review we will focus on recent progress in the field of two-dimensional(2D) and three-dimensional(3D)display technologies.We present the current display materials and their applications,including organic l... In this review we will focus on recent progress in the field of two-dimensional(2D) and three-dimensional(3D)display technologies.We present the current display materials and their applications,including organic light-emitting diodes(OLEDs),flexible OLEDs quantum dot light emitting diodes(QLEDs),active-matrix organic light emitting diodes(AMOLEDs),electronic paper(E-paper),curved displays,stereoscopic 3D displays,volumetric 3D displays,light field3 D displays,and holographic 3D displays.Conventional 2D display devices,such as liquid crystal devices(LCDs) often result in ambiguity in high-dimensional data images because of lacking true depth information.This review thus provides a detailed description of 3D display technologies. 展开更多
关键词 display technology two-dimensional displays three-dimensional displays holographic displays
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Cross-talk-free integral imaging three-dimensional display based on a pyramid pinhole array 被引量:5
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作者 Huan Deng Qiong-Hua Wang +2 位作者 Fei Wu Cheng-Gao Luo Yao Liu 《Photonics Research》 SCIE EI 2015年第4期173-176,共4页
We propose a cross-talk-free integral imaging 3D display based on a pyramid pinhole array. The pyramid pinhole array is used to provide a point light source array. Since the generated point light source array is behin... We propose a cross-talk-free integral imaging 3D display based on a pyramid pinhole array. The pyramid pinhole array is used to provide a point light source array. Since the generated point light source array is behind a transmission-type display panel that displays an elemental image array, the pseudoscopic problem can be resolved. By setting the appropriate parameters for the pyramid pinhole array, the cross talk can be eliminated.We experimentally verify the reconstruction of the orthoscopic and cross-talk-free 3D images using the proposed 3D display. 展开更多
关键词 free Cross-talk-free integral imaging three-dimensional display based on a pyramid pinhole array EIA
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Three-dimensional display technologies in wave and ray optics: a review(Invited Paper) 被引量:4
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作者 张浩 赵燕 +1 位作者 曹良才 金国藩 《Chinese Optics Letters》 SCIE EI CAS CSCD 2014年第6期2-7,共6页
Multiple three-dimensional (3D) display technologies are reviewed. The display mechanisms discussed in this paper are classified into two categories: holographic display in wave optics and light field display in ra... Multiple three-dimensional (3D) display technologies are reviewed. The display mechanisms discussed in this paper are classified into two categories: holographic display in wave optics and light field display in ray optics, which present the 3D optical wave field in two different ways. Key technical characteristics of the optical systems and the depth cues of human visual system are analyzed. It is to be expected that these 3D display technologies will achieve practical applications with the increase of the optical system bandwidth. 展开更多
关键词 three-dimensional display technologies in wave and ray optics WAVE
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Evolution of stereoscopic imaging in surgery and recent advances 被引量:4
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作者 Katie Schwab Ralph Smith +2 位作者 Vanessa Brown Martin Whyte Iain Jourdan 《World Journal of Gastrointestinal Endoscopy》 CAS 2017年第8期368-377,共10页
In the late 1980s the first laparoscopic cholecystectomies were performed prompting a sudden rise in technological innovations as the benefits and feasibility of minimal access surgery became recognised.Monocular lapa... In the late 1980s the first laparoscopic cholecystectomies were performed prompting a sudden rise in technological innovations as the benefits and feasibility of minimal access surgery became recognised.Monocular laparoscopes provided only two-dimensional(2D) viewing with reduced depth perception and contributed to an extended learning curve.Attention turned to producing a usable three-dimensional(3D) endoscopic view for surgeons;utilising different technologies for image capture and image projection.These evolving visual systems have been assessed in various research environments with conflicting outcomes of success and usability,and no overall consensus to their benefit.This review article aims to provide an explanation of the different types of technologies,summarise the published literature evaluating 3D vs 2D laparoscopy,to explain the conflicting outcomes,and discuss the current consensus view. 展开更多
关键词 three-dimensional laparoscopy ENDOSCOPY three-dimensional displays Minimally invasive surgery STEREOSCOPIC
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Three-color upconversion luminescence of rare earth codoped oxyhalide tellurite glasses 被引量:2
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作者 徐时清 王玮 +3 位作者 邓德刚 赵士龙 王焕平 鞠海东 《Journal of Rare Earths》 SCIE EI CAS CSCD 2008年第6期895-898,共4页
The red, green, and blue upconversion properties of Er^3+/Tm^3+/Yb^3+-codoped oxyhalide tellurite glasses were studied under 980 nm LD excitation. The intense red (657 nm), green (530 and 545 nm), and blue (47... The red, green, and blue upconversion properties of Er^3+/Tm^3+/Yb^3+-codoped oxyhalide tellurite glasses were studied under 980 nm LD excitation. The intense red (657 nm), green (530 and 545 nm), and blue (476 nm) emissions were simultaneously observed at room temperature. The results showed that the mixed halide modified tellurite glass (TZFCB) had strong upconversion emissions. The effect of halide on upconversion intensity was observed and discussed, and possible upconversion mechanisms were evaluated. The intense red, green, and blue upconversion luminescence of Er^3+/Tm^3+/Yb^3+-codoped oxyhalide tellurite glasses might be a potentially useful material for developing three-dimensional displays applications. 展开更多
关键词 oxyhalide tellurite glass upconversion luminescence three-dimensional volumetric display rare earths
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Three-photon-excited fluorescence of Tb^(3+)-doped CaO-Al_2O_3-SiO_2 glass by femtosecond laser irradiation 被引量:3
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作者 马红萍 祝邦文 邹凤楼 《Journal of Rare Earths》 SCIE EI CAS CSCD 2008年第6期928-931,共4页
A near infrared to visible blue, green, and red upconversion luminescence in a Tb^3+-doped CaO-Al2O3-SiO2 glass was studied, which was excited using 800 nm femtosecond laser irradiation. The upconversion luminescence... A near infrared to visible blue, green, and red upconversion luminescence in a Tb^3+-doped CaO-Al2O3-SiO2 glass was studied, which was excited using 800 nm femtosecond laser irradiation. The upconversion luminescence was attributed to ^5D3→^7F5, ^5D3→^7F4, ^5D3→^7F3, ^5D4→^7F6, ^5D4→^7F5, ^5D4→^7F4, and ^5D4→^7F3 transitions of Tb^3+. The relationship between upconversion luminescence intensity and the pump power indicated that a three-photon simultaneous absorption process was dominant in this upconversion luminescence. The intense red, green, and blue upconversion luminescence of Tb^3+-doped CaO-Al2O3-SiO2 glass may be potentially useful in developing three-dimensional display applications. 展开更多
关键词 three-photon-excited fluorescence three-dimensional (3D) volumetric display Tb^3+-doped CaO-Al2O3-SiO2 glass rare earths
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Technical analysis of 3DTV and outstanding issues
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作者 张兆杨 程浩 +1 位作者 沈礼权 杨高波 《Journal of Shanghai University(English Edition)》 CAS 2011年第4期316-320,共5页
This paper analyzes the technical characteristic of three-dimensional display technology (3DTV) system and some core technologies yet to be solved. It points out the ways to solve these problems and presents an effe... This paper analyzes the technical characteristic of three-dimensional display technology (3DTV) system and some core technologies yet to be solved. It points out the ways to solve these problems and presents an effective solution for thediscomfort of watching the three-dimensional TV. 展开更多
关键词 three-dimensional (3D) display multi-view/depth coding inter-view rendering discomfort of watching threedimensional display technology (3DTV)
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The study of two-color excitation upconversion of Pr(0.5)Yb(3):ZBLAN 被引量:3
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作者 CHEN Xiaobo1 & SONG Zengfu2 1. Applied Optics Beijing Area Major Laboratory, Analysis and testing center, Beijing Normal University, Beijing 100875, China 2. Peking University, Physics School, Beijing 100871, China 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2006年第2期169-177,共9页
The excited state absorption upconversion of Pr(0.5)Yb(3):ZBLAN glass material, under two-color excitation of the 960 nm semiconductor laser and the Xe lamp light simultaneously, is reported in this article. It was fo... The excited state absorption upconversion of Pr(0.5)Yb(3):ZBLAN glass material, under two-color excitation of the 960 nm semiconductor laser and the Xe lamp light simultaneously, is reported in this article. It was found that the upconversion emission spectra of 480.1, 519.0, 601.9 and 631.8 nm coincide with the common emission spectra. Meanwhile, the upconversion-excitation spectrum has three obvious peaks under two-color excitation, and they respectively correspond to the 856.0 nm upconversion ex-citation transition [1G4(Pr3+)→1I6(Pr3+) and 1G4(Pr3+)→3P1(Pr3+)], the 789.0 nm upconver-sion excitation transition 1G4(Pr3+)→3P2(Pr3+), and the 803.7 nm upconversion excitation transition 3H6(Pr3+)→1D2(Pr3+). The upconversion excitation transition 1G4(Pr3+)→1I6(Pr3+) is strong because its oscillator strength f = 23.040×10?6 is large, which results in a large peak appearing in the upconversion excitation spectrum. That is just the new interesting two-color excitation upconversion luminescence phenomenon of Pr(0.5)Yb(3):ZBLAN induced by one laser and one continuous normal light simultaneously. 展开更多
关键词 UPCONVERSION VOLUMETRIC three-dimensional display two-color excitation.
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