嵌入式系统的显卡方案设计

介绍具有面向微处理器的通用接口显卡系统,可使低速微处理器轻松驱动高分辨率显示器,且占用微处理器的时间极少。该方案以DDR SDRAM为显存存储图像数据,以FPGA为核心,控制并读/写显存中的数据,并将显存中的数据同步到液晶屏的驱动时钟下,形成持续的数据流,同时输出控制信号控制液晶屏的驱动,嵌入式微处理器仅需要在改变图像时输出数据,而不需持续输出驱动信号和数据流,从而大大降低嵌入式处理器的驱动负担。     

Telidon graphics and applications

Telidon is essentially a computer graphics code which is very effective as the presentation level protocol for videotex, for which it was originally developed, teletext and other consumer- and business-oriented information systems. Its use of geometric primitives rather than the mosaic characters of its predecessors permits efficient digital storage and rapid transmission of detailed graphics. Display terminals can be built to display the images with different degrees of detail to suit the application.     

应用于嵌入式RTOS的图形显示系统设计

针对嵌入式系统特点,构建了一种基于嵌入式RTOS的图形显示系统（ERGS）架构,设计了一种基于服务器/客户端的异步回调模型和请求/应答处理机制,结合ERGS特点提出了一种改进的基于消息的发布/订阅模型和相应的路由规则。并在实时操作系统VxWorks实现了ERGS。实验结果表明,在相同的嵌入式平台上,ERGS相对于传统图形显示系统性能有较大提升,特别是启用GPU硬件加速时,ERGS图形系统性能大幅度提升。     

基于MIDAS的企业物资采购系统的设计与实现

分析了两层C／S结构系统存在的问题，阐述了多层分布式数据库技术MIDAS的基本原理，并将MIDAS技术应用到企业物资采购管理系统的开发中，介绍了系统的设计思想及MIDAS技术在系统中的具体实现方法。该项技术的应用，提高了系统的扩展性、稳定性和效率。     

基于MIDAS技术的教学管理系统的设计与实现

分布式多层数据库技术目前已成为构建数据库应用系统的主流技术,Delphi中的MIDAS技术是进行多层数据库应用开发的利器。介绍了MIDAS的基本知识以及基于MIDAS技术进行多层数据库开发的方法,并将其应用到教学管理系统的开发中,提高了系统的效率,最后讨论了系统的特点及存在的问题。     

Computer graphics in CAM applications

Correct structuring and representation of production management-information will make the decision process more efficient in a factory. Graphic representation of survey data and comparisons are often very useful, although one loses some accuracy, compared with tables. The use of colours in this context makes the charts easier to understand, and more information may be shown without making the chart unclear. These facts have made the interactive graphic techniques useful for planning and resource allocation purposes. The result has been installed in industry.The study also presents a new method for automatic quality supervision. A detailed analysis of workpieces and products from mechanical industry is carried out.The method is a substitute for visual inspection as well as manual measurements: Missing holes, broken corners, and undesired material are detected. Important details are measured. There are individual tolerances on all measures. Parts that do not meet the requirements are rejected.The supervision program is easily changed, and the method is therefore suitable for small series production. The picture from a special TV camera is the basis for the quality supervision, which is of the noncontact type.     

Data management for an interactive graphics system oriented to planning applications

INTRANS is a man-computer interactive graphics system, intended for analysis of urban and transportation planning problems. It is designed to operate primarily under time sharing on IBM 360/370 computers. The paper describes the functional design and the structure of the data management of INTRANS.

The data management is designed to answer the specific needs of planning applications: large data-sets, comparative analysis of several alternatives, and interface with batch processing computer programs. At the same time, the system is designed to operate within an environment of extremely limited resources of core and computing time.     

Design philosophy of particle system animated on graphics accelerator

The distribution design of the computing load between the central processor and graphics accelerator for particle animation systems is presented. A method for compressing data streams between the system and graphic memory is proposed. The method for formations and animations of particle shapes directly on a graphics accelerator is described. An efficient particle-sorting method is presented.     

Collision detection for interactive graphics applications

Collision detection and response are important for interactive graphics applications such as vehicle simulators and virtual reality. Unfortunately, previous collision detection algorithms are too slow for interactive use. The paper presents a new algorithm for rigid or articulated objects that meets performance goals through a form of time critical computing. The algorithm supports progressive refinement, detecting collisions between successively tighter approximations to object surfaces as the application allows it more processing time. The algorithm uses simple four dimensional geometry to approximate motion, and hierarchies of spheres to approximate three dimensional surfaces at multiple resolutions. In a sample application, the algorithm allows interactive performance that is not possible with a good previous algorithm. In particular, the new algorithm provides acceptable accuracy while maintaining a steady and high frame rate, which in some cases improves on the previous algorithm's rate by more than two orders of magnitude     

同步图形存储器IS42G32256的原理与应用

ＩＳ４２Ｇ３２２５６是高速度 １６Ｍｂｉｔ ＣＭＯＳ同步图形存储器（ＳＧＲＡＭ）,适用于高性能计算机的显示卡、图形工作站、电视机顶盒、游戏卡、二维／三维图形处理等场合。对其功能、特点、工作原理及其应用进行了介绍。     

The Pascal graphics system

A two dimensional high level graphics programming system based on the CORE standard graphics system¹ has been implemented. The graphics programming language used in the system is an extension of the programming language Pascal. In this paper the graphics programming features in this system are presented and the implementation issues are discussed.     

A decade of applications [computer graphics]

First, most graphics articles originate from computer graphics professionals in computer science departments or computer technology companies. Their job is to extend and refine graphics technology itself, and tell us of their progress. Apply computer graphics in a new area. The best applications articles occur when new technologies and equipment allow a new problem domain to benefit from graphics-based solution. And even in areas with a history of using computer graphics, finding a new technique or efficiency can give traditional applications new reach.