固态体积式真三维显示关键技术研究与实现

发布时间：2018-04-11 13:21

本文选题：固态体积式真三维 + 人类视觉特性　；参考：《合肥工业大学》2017年博士论文

【摘要】：体显示是目前实现真三维显示的主流技术路径之一,而静态体积式显示无任何移动部件,具有非常高的发展潜力。本文阐述了真三维显示的视觉机理和显示特性,研究并实现了海量显示数据的高速实时处理方法;研究了深度抗锯齿、灰度级修正、闪烁评价及优化等真三维成像质量的提升与优化方法;完成了真三维显示原型样机的研制。本文的主要研究内容包括:1)真三维显示的视觉机理与成像分析。讨论了视觉暂留、似动现象及人眼的空间与时间分辨率,这些视觉特性是形成真三维显示的基础。阐述了体素、显示空间及真三维成像的原理和特点,提出了“体柱”的概念。利用全光函数分析研究了真三维显示的数据流量。相关视觉机理和成像基础的研究,为真三维显示系统的研究与设计提供了理论依据。2)海量显示数据的高速实时处理方法研究与实现。分析了真三维显示数据的处理流程,提出了体数据的生成和编码传输方法。阐述了图像预处理方法、图像引擎的设计目标和功能描述。深入研究了图像引擎数据处理过程中的数据格式变换及地址映射方法,建立了相关的数学模型。在理论研究的基础上提出了真三维图像引擎的FPGA实现方法,实现了海量显示数据的高速实时处理。3)真三维成像质量提升和优化方法研究。针对真三维显示中由于显示体结构和光电特性等引起的各种显示缺陷,在理论研究和实验验证的基础上提出了一系列显示质量改善方法。针对深度不连续问题,提出了一种基于分类映射的深度抗锯齿算法。提出了层间梯度的概念,分析了不同映射类型对于深度连续性的影响,给出了体素映射类型的判定算法。针对灰度级失真问题,在分析显示体光电特性的基础上推导出成像亮度变化函数及灰度级偏差。通过调整显示体驱动时序及重新分配子帧,结合反伽马校正,实现了灰度级的修正。针对真三维显示的闪烁优化问题,提出了一种时间对比敏感度函数加权幅值谱对比度的闪烁程度评价模型及一种层间交织扫描的显示体刷新方法,完成了两组视觉感知实验,并通过统计分析验证了评估模型的准确性和刷新方法的有效性。4)真三维显示系统原型样机的研制与实现。提出了真三维显示系统的整体架构方案,详细论述了显示数据处理电路、投影光路、显示体及驱动等子系统的设计与装配。重点阐述了DLP控制电路的数据接收和数字微镜器件的复位时序设计、光路结构和光源设计、显示体光电特性和驱动方法设计。对系统的主要性能参数进行了测试和评价,并进行了三维成像实验。结果表明,本文所研制的真三维显示原型样机整体性能达到国际先进水平。本文所研制的真三维显示原型样机性能达到预期设计目标,同时在研制过程中掌握了具有自主知识产权的核心关键技术,为体积式真三维显示技术的理论研究和工程实践积累了经验并提供了重要的实物验证平台。
[Abstract]:Display is currently one of the mainstream technology to achieve path true 3D display, while the static volume display without any moving parts, with very high development potential. This paper expounds the visual mechanism of true 3D display and display characteristics, research and implementation of a massive display of real-time data processing method of high speed; the depth of anti aliasing, the gray level correction, flicker evaluation and optimization of true 3D imaging quality improvement and optimization method; complete the true 3D display development prototype. The main research contents of this paper include: 1) and visual imaging machine analysis of true 3D display. Discuss the persistence of vision, like space and time resolution phenomenon and the human eye and these visual characteristics is the basis of true 3D display. It expounds the principle and characteristics of voxel, display space and real 3D imaging, puts forward the concept of "columns". By means of the optical function Analysis of data flow for true 3D display. Research on vision mechanism and imaging based on the true 3D display provides a theoretical basis for the research and design of.2 system) research and implementation of high speed real-time processing method of massive data display. Analysis of the true 3D display of data processing, the data generation and encoding transmission method are expounded. The method of image preprocessing, image engine design goal and function description. Further study of the image data processing engine in the process of data format conversion and address mapping method, the related mathematical model is established. On the basis of the theory proposed FPGA true 3D graphics engine, realized the mass showed high speed real-time processing of.3 data) really 3D imaging quality improvement and optimization method. According to the true 3D display as display body structure and photoelectric properties etc.. The various display defects, based on theoretical study and experimental verification of the proposed a series of methods to improve the display quality. Aiming at the depth discontinuities, an anti aliasing algorithm based on the depth of classification mapping is proposed. Put forward the concept of inter layer gradient, analyzes the different map types to influence depth continuity, are given the algorithm of determining the voxel mapping type. In order to solve the problem of gray level distortion, deduces the image brightness change function and gray level bias in the analysis based on the characteristics of photoelectric display. By adjusting the display driving timing and redistributing the sub frame, combined with the inverse gamma correction, the correction of gray level. Aiming at the optimization problem really flicker the three-dimensional display, a display time of contrast sensitivity function weighted amplitude spectrum evaluation flashness contrast model and a layer of interlaced scanning body refresh method, complete Two groups of visual perception experiment, and through statistical analysis verify the effectiveness of the.4 accuracy evaluation model and refresh method) for true 3D display development and implementation of the prototype system was put forward. The true 3D display scheme of the overall architecture of the system, discusses the display data processing circuit, optical projection, display design and assembly and drive subsystems. Focuses on the design of reset timing control circuit of the DLP data receiving and digital micromirror device, optical structure and light source design, display and driving method of photoelectric characteristics design. Testing and evaluation of the main performance parameters of the system, and the 3D imaging experiment. The results showed that the the true 3D display prototype overall performance reached the international advanced level. The development of true 3D display prototype performance to achieve the desired design goals, at the same time in the development of In the process, we have mastered the core technology with independent intellectual property rights, and accumulated experience for the theoretical research and engineering practice of volumetric true 3D display technology, and provided an important physical verification platform.

【学位授予单位】：合肥工业大学
【学位级别】：博士
【学位授予年份】：2017
【分类号】：TN27

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