TOPIC 1 A SURVEY OF COMPUTER GRAPHICS CGMB214: Introduction to Computer Graphics

Objectives To identify the application of computer graphics.

What is Computer Graphics?

Pictures created by computer. Tools used to make such pictures. Tools Field of study that involves these tools and the pictures they produce.

Tools Hardware  Display graphics: Video monitor, graphics cards, printers  Input device: Mouse, data glove, trackball Software  OS, editor, compiler, debugger  Collection of graphic routines  Graphics libraries

What is Computer Graphics? Pretty Pictures Data Structures AlgorithmMathematics

Why learn Computer Graphics?

To get a better tools for plotting curves and representing data (Excel) To develop a more user friendly system (compare text with interactive images) To write computer animated games As a medium for artistic expressionartistic expression A better platform for communicating ideascommunicating ideas

Artistic Expression

Communicating Ideas

Where Computer Graphics are applied?

Graphs and Charts Computer Aided Design Virtual Reality Environment Data Visualisation Education and Training Computer Art Entertainment Image Processing Graphical User Interface

Graphs and Charts To generate graph (for financial, statistical, mathematical, scientific, engineering and economic data summarisation) Evolve from 2D to 3D

Graphs and Charts Series 1Series 2Series 3 Category Category Category Category

Graphs and Charts

Computer Aided Design Used to design buildings, automobiles, aircrafts, watercrafts, spacecrafts, computers, textile, home appliances etc. Wireframe is used to show interior and exterior. Animation is used to test the performance of the design (circuit and network communication) Realistic display of architectural design shows the floor layout and lighting conditions

Wireframe

Circuit Diagram Animation

Realistic Display

Virtual Reality Environment An environment where user interacts with objects in 3D scene. Used for  Training of heavy equipment operators  Analysing the effectiveness of cabin configurations and control placements

Data Visualisation Scientific visualisation refers to graphical representations for scientific, engineering and medical data. Scientific visualisation Business visualisations is used to connect data sets related to commerce, industry and other non- scientific areas.

Scientific Visualisations A scientific visualization of an extremely large simulation of a Rayleigh–Taylor instability caused by two mixing fluids Weather visualisation DNA Visualisation

Education and Training Simulators are used for practise sessions.  Most simulators have video screen  Examples: ship captains, aircraft pilot, heavy equipment and air traffic personnel simulators. Coursewares are used for educational aids.  Includes colour coded diagrams, animations,

Simulators

Computer Art Pictures are painted electronically on graphic tablet. Automatic Art is painting produced on a pen plotter using specific software without intervention of the artist Mathematical Art is painting that is generated using mathematical functions. Morphing is a method where one object is transformed into another.

Automatic Art Whigmalaree was created with combination of methods using a graphics tablet, 3D modeling, texture mapping and a series of geometric transformation, by Wynne Ragland, Jr.

Mathematical Art Object created is based on a visualisation of Fermat’s Last Theorem, x n + y n = z n, n = 5

Morphing

Entertainment Movie Production, Animation, Special Effect 2012 LOTR Shrek Harry Potter Computer Games Ragnarok Mario Bro. EA Sport series Browsing the WWW Compare website without graphics and with graphics

Entertainment

Image Processing The process of modification or interpretation of existing pictures  Computer Graphics create image  Image Processing enhance image Image from camera Image created (CG) Satisfied with Image? Image accepted NO Enhance Image (IP) YES

Image Enhancement A blurred photograph of a license plate become legible after the application of image processing technique.

Graphical User Interfaces (GUI) Typical graphical interface contains multiple display windows, menus and icons.

What happen to the real werewolf?

References

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