CAREER: Closed-Loop Augmented Environment Systems

研究内容：声发射系统中的闭环系统。该项目通过对增强环境(AE)和虚拟环境(VE)跟踪系统设计的新的“统一系统”方法来解决增强环境(AE)和虚拟环境(VE)跟踪系统的不足。即使有最好的头盔显示器(HMD)和图形系统可用，跟踪系统的缺点也阻碍或排除了许多AE/VE应用的有效性。这样的应用，包括在线手术可视化、组装或维护辅助以及交互式培训模拟，需要针对以下问题的可靠解决方案。1)达到毫米(位置)和0.1度(方位)精度。2)容易实现跟踪系统与真实世界的精确校准。3)消除(或最小化)跟踪(和图形)系统中的延迟，以防止头部运动期间的严重未对准。该项目旨在开发新的技术和改进的方法，使基于视频的声发射系统可用于商业和科学应用，并具有生产力。长期的研究目标是在用户活动的所有条件下，包括快速头部运动，在增强的环境中准确地对准真实和虚拟对象。要实现这样的性能，需要将新的图像和跟踪功能组件集成到声发射系统中。2D对准误差度量形成用于补偿各种3D跟踪和校准误差的基础。在每一帧上计算和应用校正，创建了一个闭环系统，该系统补偿了静态和动态(延迟引起的)未对准。该项目将通过以下方式增进对闭环系统的了解：1)实施软件模拟器，以促进快速探索用于特征检测误差测量和误差补偿的闭环式声发射系统设计选项；2)设计新的声发射系统体系结构，其组件具有与系统中其他组件的简单、明确的接口；以及3)开发完整的闭环声发射系统的原型并量化其性能特征。教育部分：通过体验更丰富的理解。教学职责包括在每个秋季和春季学期至少开设一门课程。为研究生开设的两门课程的计算机图形序列课程正在开发中。这些课程建立在本科生入门课程的基础上，强调项目创造。为学生提供适当级别的系统建设学习机会是教育活动的一个主要重点。除了教学大纲设计和课堂教学外，定向研究和建议还促进了师生互动。将为入门级和高级级开发一张含有图形概念的计算机图形模拟的光盘。

Research Component: Closing the loop in AE systems. The project addresses augmented environment (AE) and virtual environment (VE) tracking system inadequacies through a new `unified-system` approach to AE system design. Even with the best head-mounted displays (HMDs) and graphic systems available, the shortcomings of tracking systems hinder or preclude the usefulness of many AE/VE applications. Such applications, including on-line surgical visualization, assembly or maintenance assistance, and interactive training simulations, require robust solutions to the following problems. 1) Achieving millimeter (position) and 0.1 degree (orientation) accuracy. 2) Readily achieving precise calibration of tracking systems to the real world. 3) Eliminating (or minimizing) latency in tracking (and graphics) systems to prevent gross misalignment during head motion. This project aims to develop new technology and improved methods for making video-based AE systems usable and productive for commercial and scientific applications. The long term research goal is the accurate alignment of real and virtual objects in an augmented environment under all conditions of user activity including rapid head motion. Achieving such performance required the integration of new image and tracking function components into an AE system. A 2D alignment error metric forms a basis for the compensation of a variety of 3D tracking and calibration errors. Corrections are computed and applied at every frame creating a closed loop system which compensated for both static and dynamic (latency-induced) misalignment. The project will produce increased understanding of closed loop AR systems by 1) implementing a software simulator to facilitate rapid exploration of closed loop AE system design options for feature detection error measurement, and error compensation, 2) designing a new AE system architecture with components which have simple, well-defined interfaces to other co mpenents in the system, and 3) developing a prototype of a complete closed-loop AE system and quantifying its performance characteristics. Education Component: Richer understanding through experience. Teaching responsibilities include at least one course during each Fall and Spring semester. A two-course Computer Graphics sequence for graduate students is under development. These courses build on the introductory undergraduate course and emphasize project creation. Hands on system-building learning opportunities, at the appropriate levels for students, are a major focus of the educational activities. In addition to syllabus design and class teaching, directed-research and advising promotes student-faculty interactions. A CD-ROM with computer graphics simulations of graphics concepts will be developed for both introductory and advanced levels.