Memory Design for Raster Graphics Displays

This tutorial examines the origin and nature of the problem of contention for memory cycles?a problem that impacts the image update performance of every raster graphics system.     

Overlap Operations and Raster Graphics

This paper outlines the development of a volume and surfaces modelling system for use with raster graphic displays. The ideas are presented in a historical framework to make the reasoning behind the design decisions clear and to indicate the main influences which have guided the work. There are two outcomes of importance: a language form for defining volumes and surfaces; and hardware to convert this representation directly into a display. The hardware provides hidden-line or hidden-area removal as a display primitive which, in an appropriate implementation, can be fast enough to support a range of real-time display applications. Linked to this hidden-line, hidden-area removal facility is an ability to provide interference tests for objects that are being moved around in a scene. Again there appears to be a hierarchy of applications ranging in complexity from interactive volume editing to robot control and vision systems. The new facilities complement existing point and line based display operations, on which most current displays' hardware is based. A good case is emerging for integrating the two approaches into a single hardware implementation for CAD workstations and for simulator display systems.     

A Raster Display Graphics Package for Education

We discuss in this article the need for a minimum suite of raster display routines, the design requirments for such a suite of routines, and the specifications for a package satisfying these design requirements. Finally, we outline our experience with the implementation and use of the resulting package in an educational environment. In the Appendix we give a detailed specification of the actual package we have developed and the user manual for that package.     

PERQ and Advanced Raster Graphics Workstations

A National Network of Inexpensive, High-Powered, Single-User Computers with Good Interactive Capabilities Is Being Launched in the UK.     

电视扫描式图形显示智能软件

本文是笔者研制的新产品中的软件部分,产品已多年应用于生产实际中,该电视扫描式图形显示是以微处理器为核心,使用专门的CRT控制器,引用较成熟的电视扫描原理构成的[1].即时显示的图形内容存贮于刷新存贮器中,象素与该存贮器的位置具有一一对应的"映象"关系.在刷新扫描期间,刷新存贮器每一位的内容(即象素值)被顺次读出,经过视频控制电路,转换成视频信号,送CRT显示.用软件改变存贮器中的内容,便能显示各种图形.     

A General-Purpose Multi-Microprocessor Raster Graphics Display System with Anti-Aliasing

The raster graphics display system described represents a general purpose mini-computer, specially for CAD applications. The system is based on a hierarchical asynchronous multiple microprocessor system. In practice this mini-computer is extendable up to 15–20 workstations. On the workstations, different graphical and non-graphical devices can be connected. The most interesting workstation is a raster graphics display device which was developed specially for the computer system described. This raster graphics display device contains a processor for the application program, two dedicated processors and two separate identical frame buffers, each of them containing one whole set of image data. Applying algorithms for anti-aliasing, virtual pixel dislocation (intensity dislocation) and multi-pixel-overlappings with hidden line (surface) elimination the image readability and quality can be increased considerably. In particular the paper deals with an anti-aliasing algorithm with a real-time hardware realization.     

光栅扫描显示器中视频模拟混合方法

现代雷达光栅扫描显示器在显示二次信息的同时，仍然保留原始雷达回波等一次信息，需要在同一屏幕上混合显示一次和二次信息的视频信号，这是实现中的一个难点。该文在充分利用计算机资源和增强通用性的基础上，提出了一种模拟混合的方法。     

高级计算机图形学建模技术

本文综述了几种不同类型的高级计算机图形学建模技术,然后介绍了计算机图形学高级建模技术的发展方向。     

Filling Complex Polygons by Region-Fill Methods on Raster Graphics Terminals

A method is described for filling polygons according to the GKS Fill Area definition on terminals that provide only region-filling capabilities. The advantages and disadvantages of using this algorithm in GKS device drivers are considered.     

Continuity and Interpolation Techniques for Computer Graphics

Continuity and interpolation have been crucial topics for computer graphics since its very beginnings. Every time we want to interpolate values across some area, we need to take a set of samples over that interpolating region. However, interpolating samples faithfully allowing the results to closely match the underlying functions can be a tricky task as the functions to sample could not be smooth and, in the worst case, it could be even impossible when they are not continuous. In those situations bringing the required continuity is not an easy task, and much work has been done to solve this problem. In this paper, we focus on the state of the art in continuity and interpolation in three stages of the real‐time rendering pipeline. We study these problems and their current solutions in texture space (2D), object space (3D) and screen space. With this review of the literature in these areas, we hope to bring new light and foster research in these fundamental, yet not completely solved problems in computer graphics.     

Some Issues in Designing User Interfaces to 3D Raster Graphics

Now that raster graphics has become a common tool in CAD/CAM systems, animation and many other applications, the need has arisen for user interfaces to graphics packages for these new applications. On the basis of a typology of the users, an analysis is presented of some of the choices which have to be made in developing these interfaces.     

Adding a True 3-D Display to a Raster Graphics System

This Experimental 3-D Graphics System Can Be Added to Standard Raster Graphics Systems at Modest Expense. It Promises Much Broader Access to Effective 3-D Display.     

Graphics Software-from Techniques to Principles

The history of graphics software mirrors that of computing in general: we work out basic techniques; we develop algorithms; we begin to search for standards.     

Graphics Evolutionary Computations in Higher Order Parametric Bezier Curves

This work demonstrates in practical terms the evolutionary concepts and computational applications of Parametric Curves. Specific cases were drawn from higher order parametric Bezier curves of degrees 2 and above. Bezier curves find real life applications in diverse areas of Engineering and Computer Science, such as computer graphics, robotics, animations, virtual reality, among others. Some of the evolutionary issues explored in this work are in the areas of parametric equations derivations, proof of related theorems, first and second order calculus related computations, among others. A Practical case is demonstrated using a graphical design, physical hand sketching, and programmatic implementation of two opposite-faced handless cups, all evolved using quadratic Bezier curves. The actual drawing was realized using web graphics canvas programming based on HTML 5 and JavaScript. This work will no doubt find relevance in computational researches in the areas of graphics, web programming, automated theorem proofs, robotic motions, among others.     

High-Speed Techniques for a 3-D Color Graphics Terminal

Innovative concepts in hardware architecture and data structure enable graphics processing at a speed about five times that of conventional raster-scan devices.