Introduction to computer graphics

Introduction to computer graphics

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  INTRODUCTION TO COMPUTER GRAPHICS Preparedby R. Gomathijayam Asst. Prof. of CA
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  2 Computer Graphics • Computergraphics deals with all aspects of creating images with a computer – Hardware – Software – Applications
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  3 Basic Graphics System Inputdevices Output device Image formed in FB
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  4 Display Processor • Ratherthan have the host computer try to refresh display use a special purpose computer called a display processor (DPU) • Graphics stored in display list (display file) on display processor • Host compiles display list and sends to DPU
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  Applications of ComputerGraphics • Computer Aided Design (CAD) • Presentation Graphics • Computer Art • Entertainment (animation, games, …) • Education & Training • Visualization (scientific & business) • Image Processing • Graphical User Interfaces
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  1.Computer Aided Design(CAD) – Used in design of buildings, automobiles, aircraft, watercraft, spacecraft, computers, textiles & many other products – Objects are displayed in wire frame outline form – Software packages provide multi-window environment
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  2.Presentation Graphics • Usedto produce illustrations for reports or generate slides for use with projectors • Commonly used to summarize financial, statistical, mathematical, scientific, economic data for research reports, managerial reports & customer information bulletins • Examples : Bar charts, line graphs, pie charts, surface graphs, time chart
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  3.Computer Art • Usedin fine art & commercial art – Includes artist’s paintbrush programs, paint packages, CAD packages and animation packages – These packages provides facilities for designing object shapes & specifying object motions. – Examples : Cartoon drawing, paintings, product advertisements, logo design
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  4.Entertainment • Movie Industry –Used in motion pictures, music videos, and television shows. – Used in making of cartoon animation films Slide information from Leonard McMillian's slides http://www.cs.unc.edu/~mcmillan/comp136/Lecture1/compgraf.ht ml
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  5.Education & Training •Computer generated models of physical, financial and economic systems are used as educational aids. • Models of physical systems, physiological systems, population trends, or equipment such as color-coded diagram help trainees understand the operation of the system
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  6.Visualization • Scientific Visualization –Producing graphical representations for scientific, engineering, and medical data sets
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  • CG- Computeris used to create a picture • Image Processing – applies techniques to modify or interpret existing pictures such as photographs and TV scans • Medical applications – Picture enhancements – Tomography – Simulations of operations – Ultrasonics & nuclear medicine scanners • 2 applications of image processing – Improving picture quality – Machine perception of visual information (Robotics) 7. Image Processing
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  8.Graphical User Interfaces •Major component – Window manager (multiple-window areas) • To make a particular window active, click in that window (using an interactive pointing device) • Interfaces display – menus & icons • Icons – graphical symbol designed to look like the processing option it represents • Advantages of icons – less screen space, easily understood • Menus contain lists of textual descriptions & icons