基于虚拟化硬件3D图形加速的渲染云框架

渲染云作为云计算的一个特定细分,同时作为把对计算能力敏感的应用程序扩展到云计算这一趋势的典型代表,具有广阔的发展前景.当前与渲染云直接相关的工作主要有传统的各种渲染集群以及Nvidia的RealityServer平台.但是前者不支持作为云计算基础的虚拟化技术,后者限制了渲染云平台的硬件,并且不能整合各种不同的图形加速设备使其协同工作.本文首先分析了VMGL、VMware、Xen以及VirtualBox等虚拟机3D图形加速技术,并对用这些技术实现渲染云的可行性进行比较,提出了基于VMGL的渲染集群方案.接着在渲染集群的基础上对渲染云相关技术进行了研究,提出了一个灵活、能够支持不同3D图形加速设备协同工作的、基于虚拟化的渲染云框架.     

基于时间序列的并行实时渲染系统研究与实现

并行渲染技术是构建大规模三维虚拟场景的有效途径。本文从时间序列的并行渲染技术入手,提出了新的集群控制渲染算法,并在此基础上构建了一个时序集群渲染系统。实验结果表明,该并行渲染系统相对于单机系统具有较高的加速比,针对大规模复杂三维场景的渲染,该系统的渲染速度提升明显。     

一种三维GIS云渲染的集群方案及实践

提出一种由浏览器终端、服务中心、渲染推送器和不同三维地理信息系统(geographic information system,GIS)引擎共同组成的基于实时音视频通信技术(web realˉtime communications,WebRTC)协议的远程过程调用(remote procedure call,RPC)集群系统的解决方案。服务中心既是管理WebRTC两端协作的信令服务,也是用户的唯一入口,管理前后端各种业务模型。渲染推流器通过接口注入三维系统方式采集三维渲染帧并处理成视频流推送给客户端,可协同多种类多数量的三维渲染引擎,对渲染推流端机器的横向扩展就形成了渲染集群。笔者将该套方案应用于多个项目实践中,达到了低延迟、插拔式、集群化、强交互、远程调用的要求,在使用过程中效果良好,降低了软硬件成本,方便部署与维护,提高了数据安全性。     

基于校园网的集群渲染系统的研究与建设

目前集群渲染技术已经成为动漫创作、影视制作领域中的关键技术,浙江传媒学院根据学院发展需要,建设了基于校园网的集群渲染系统,介绍了该系统的规划和设计,以及系统的运行工作流程。     

共享高端视频制作网络的动画集群渲染系统

介绍了电脑动画渲染技术的发展,针对单机制作能力有限的情况,提出集群渲染系统的概念,分析了系统的关键元素,介绍了与高端视频制作网络共享的动画集群渲染系统。     

网络集群渲染的技术优势

介绍了利用集群计算机优势，通过网络分发软件和并行3D实现渲染的主要技术。     

实验教学中心集群渲染系统的构建与测试

为了整合实验教学中心现有设备资源,提升数字艺术类专业人才培养质量,在分析集群渲染服务的基础上,分别从硬件结构和软件框架两个方面详细讨论了集群渲染系统的具体构建方法,给出了系统的拓扑结构和选型标准,并利用通用的测试基准对系统的通信性能、运算性能和渲染效率进行了实例测试和对比分析。测试结果表明,集群渲染系统通信性能好,运算速度快,渲染效率高,能够满足大规模渲染工作的需要,有效地提升了实验教学中心服务教学和科研的能力。     

基于嵌入式Linux平台的集群渲染系统设计实现

在计算机图形学的影视动漫产业中,3D图形渲染始终是影响制作周期和成本的主要因素。对于小型工作室或动漫企业而言,自行构建一个具有商业渲染能力的集群渲染系统,需要大量的成本投入和高端的技术支持。针对以上问题,采用常用智能设备和开源软硬件,提出了一种基于嵌入式Linux平台的集群渲染系统构建方案。主要包括软硬件选择、操作系统移植安装和配置、硬件架构搭建、制作3D场景文件进行渲染测试。测试结果验证了该系统的可行性,且其运行良好,不影响渲染质量。     

CCTV节目包装制作系统工程项目介绍--2005年度国家广电总局科技创新奖工程类一等奖

本文介绍获2005年国家广电总局科技创新奖工程类评比一等奖的CCTV“2003节目包装系统更新改造”工程。该系统在工艺设计上全面综合了传统电视技术、电脑合成技术、三维动画和集群渲染技术、媒体文件转换技术、存储技术、专业网络接口协议与通用网络协议相结合的网络技术,实现了跨平台、跨操作系统间的互联互通、资源共享,实现了优化配置、保证质量、节约成本的网络化优势。     

应用集群渲染技术的动画生产网络体系网络安全管理

集群渲染技术正在逐渐广泛地应用到三维动画生产中来。对于应用了集群渲染技术的动画生产系统来说,要建立一个立体的病毒防御体系,完善网络结构,提高计算机的防御能力,并加强人员的管理。     

基于GIS的战术通信网络拓扑呈现技术研究

传统战术通信网络拓扑呈现系统在虚拟的逻辑环境中绘制呈现,没有充分利用节点的地理位置信息,存在显示单一、无法进行拓扑分析等众多局限。地理信息系统（GIS）的应用赋予了战术通信网络拓扑新的特性,弥补了传统网络拓扑呈现的众多局限。通过对基于GIS的战术通信网络拓扑呈现技术的研究,给出了针对战术通信网络的GIS拓扑呈现技术的常用方法,并在实际网络管理软件环境中进行应用,取得了较好的显示效果。     

基于Markdown的电子病历文档渲染方案可行性分析

文中旨在探讨使用 Markdown 来渲染电子病历文档的可行性,通过介绍 Markdown 的基本语法和特点,分析电子病历的需求和特点,渲染和展示电子病历。研究发现, Markdown 在渲染电子病历方面具有一定的潜力,能满足相关需求。通过现有或自主研发的 Markdown 渲染引擎,可以成功将 Markdown 文档转换为可视化的电子病历界面。因此,基于 Markdown 的电子病历文档渲染方案是可行的,具有一定的实用性。Markdown 具有简洁性、易读性和易写性等特征,对其进行研究和实践,可以进一步完善和推广基于 Markdown 的电子病历渲染方案。     

基于Legendre小波的扫描仪色空间转换研究

扫描仪色彩管理是图像复制过程中保证图像色彩一致性的关键技术.在分析扫描仪呈色原理的基础上,提出了一种扫描仪色彩管理新模型.首先模型采用标准色靶作为实验样本,并以彩色梯尺区色块代表整个色空间以解决实验色块选取难题.其次,利用Legendre小波和BP神经网络构造了扫描仪色彩管理Legendre神经网络模型.该模型结合扫描仪色彩管理的实际应用,提出了若干加快模型收敛的方法.最后给出的实验结果表明,与BP神经网络比较,本文模型能够提高19%色彩转换精度和62%的处理速度.     

基于Hadoop框架的WLAN网络智能管道大数据分析

移动互联网的快速发展,WLAN网络数据量剧增,智能管道能够识别用户和业务,从而为运营商精细化运营和流量经营提供保证;在运营商网络中部署智能管道的难点在于对海量数据的及时解析和呈现,文章研究了一种基于Hadoop框架的WLAN网络智能管道分析手段,应对WLAN智能管道对大数据解析效率的要求。     

Self-Management for Access Points Coverage Optimization and Mobility Agents Configuration in Future Access Networks

A key challenge for the management systems of future networks is the reduction of human interventions in the fundamental management functions. These include mechanisms that render the networks capable to configure, optimize, heal and protect itself, but also handle the emerging complexity. Demands for the future internet networks mandate the rapid assessment of the feasibility of such cognitive management architectures that shall bridge the gap between conceptual design and practical network deployments. In this paper, a novel architecture is introduced, based on organized distribution of control feedback cycles at locations allocated across network’s operational elements. Two realisations of self-management in the operations of wired and wireless access network segments are presented. The first one is focused on organization of the wireless access regions in networks by the use of compartments of access points for enabling coverage optimization. A compartment-based approach facilitates the more efficient usage of network resources, exploiting local situation awareness and local optimisation features, according to the varying traffic needs. The second realization shows the control of mobility management processes in wired parts of access networks for balancing utilization of network resources. A dynamic deployment and re-configuration of mobility agents permit to tackle the problem of congestion induced by mobility agents in mobile protocols and combined with a dynamic access router assignment, network resources are efficiently balanced within the network. The paper concludes with findings and recommendations on how common principles of self-management evolve from design theory to practice.     

Stereoscopic view synthesis based on region-wise rendering and sparse representation

Depth image-based rendering (DIBR), which is used to render virtual views with a color image and the corresponding depth map, is one of the key techniques in the 2D to 3D conversion process. One of the main problems in DIBR is how to reduce holes that occur on the generated virtual view images. In this paper, we make two main contributions to deal with the problem. Firstly, a region-wise rendering framework, which divides the original image regions into three special classes and renders each with optimal adaptive process respectively, is introduced. Then, a novel sparse representation-based inpainting method, which can yield visually satisfactory results with less computational complexity for high quality 2D to 3D conversion, is proposed. Numerical experimental results demonstrate the good performance of the proposed methods.     

Multiprotocol management agents: a look at an implementation andthe issues to consider

This paper discusses the implementation of a multiprotocol management agent. While there are numerous implementations of agents that allow for management of objects using one protocol or the other, few implementations provide for management of the same set of objects over multiple protocols. To be manageable over multiple protocols, the managed objects have to be modeled according to the different management models as well as resolve the management protocol related differences. Additional requirements may be imposed on the multiprotocol management agent to render the subagents and the protocol entities independent of the multiple protocols and management models. The differences between the multiple management mechanisms involved and the need to support future mechanisms imply that efficient implementations of management agents must converge the multiple management mechanisms into a generic local mechanism. The management agent described in this paper allows for the management of a generic network device such as a gateway. The network device operates at the transport-layer level of several communication protocol stacks and therefore, has several modules to be managed, corresponding to the lower layers of each protocol stack     

Subpixel rendering for diamond-shaped PenTile displays using patch-based adaptive filters

We propose a novel subpixel rendering algorithm for diamond-shaped PenTile displays, which reduces color distortions while improving apparent resolutions. We develop two types of subpixel rendering filters: main filter and color distortion reduction (CDR) filters. To derive the filters, we formulate a quadratic program to minimize the difference between an original input image and a virtual image that the human visual system perceives. By imposing two constraints for filter size and coefficients, we obtain the main filter, which has a suitable size and is normalized. Then, we design the CDR filters based on the analysis of various patch patterns for image areas. We define the patch patterns to classify local areas with possible color distortions. By imposing additional constraints according to the patch patterns, we derive the CDR filters. Lastly, by matching local areas in the input image into the pre-defined patch patterns, we render the image using the main filter and the CDR filters, which are applied adaptively to the local areas. Experimental results demonstrate that the proposed subpixel rendering algorithm improves apparent resolutions and suppresses color distortions effectively, thereby outperforming conventional algorithms.     

基于EPON的智能风电场通信解决方案

现有通信技术由于种种缺陷不能完全满足智能风电场场内视频、数据、语音等通信业务接入网络建设的需求,而无源光纤以太网无源光以太网（EPON,Ethernet Passive Optical Network）系统以其高宽带且可动态分配、组网灵活、故障率低、易于安装维护和扩展等特点,十分适合风电场场内多种通信业务接入网络的建设。从组网结构、技术优势、网络系统设计等方面阐述了基于EPON的智能风电场通信解决方案,验证了EPON应用于风电场的可行性。     

基于GPU加速的深度图像绘制

基于深度图像的绘制(DIBR)广泛应用于虚拟视点的合成,但是目前实现DIBR的算法复杂度都比较高,很难较实时地应用到3DTV系统中。采用单路纹理图像和其对应的深度图像进行虚拟视点的合成,在图形处理单元(GPU)上应用CUDA(Compute Unified Device Architecture)技术实现了基于深度图像的绘制。通过在NVIDIA Telsa C2050图形卡上运行,绘制分辨力1 024×768和640×480的图像速率分别达到了15 f/s(帧/秒)和24 f/s,分别能够准实时或实时地应用到3DTV系统中;同时本文的绘制方法有效地节约了传输带宽,绘制图像的主观质量良好。