graphics graphics lab @ korea university cgvr.korea.ac.kr introduction to computer graphics

Graphics

Graphics Lab @ Korea University

cgvr.korea.ac.kr

Introduction to Computer Graphics

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Computer Graphics?

ImageMathematical

Model

Image Analysis(pattern recognition,Computer Vision)

Computer Graphic

Modeling Image processing

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What is Computer Graphics? (1/2)

Definition Producing pictures or images using a computer

Example

Courtesy of Tippet Studio

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Example Bugs:


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Example The Final Stage: Burning the bugs


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Example Batman & Robin: The Love Dust

Courtesy of Buf Compagnie

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Imaging Representing 2D images

Modeling Representing 3D objects

Rendering Constructing 2D images from 3D models

Animation Simulating changes over time

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Applications

Display of Information Design Simulation Computer Art Entertainment

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Display of Information

Graphics for Scientific, Engineering, and Medical Data

Medical ImageNebula

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Design

Graphics for Engineering and Architectural System

Design of Building, Automobile, Aircraft, Machine etc.

AutoCAD 2002 Interior Design

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Simulation

Computer-Generated Models of Physical, Financial and Economic Systems for Educational Aids

Flight Simulator Mars Rover Simulator

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Computer Art

Graphics for Artist

Metacreation Painter

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Entertainment

Graphics for Movie, Game, VR)Virtual Reality) and etc.

Final FantasyOnline Game

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Representations in graphics

Vector Graphics Image is represented by continuous geometric

objects: lines, curves, etc.

Raster Graphics Image is represented as an rectangular grid of

coloured squares

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Vector graphics

Graphics objects: geometry + colour Complexity ~ O(number of objects) Geometric transformation possible without

loss of information (zoom, rotate, …) Diagrams, schemes, ... Examples: PowerPoint, CorelDraw, ...

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Raster graphics

Generic Image processing techniques Geometric Transformation: loss of information Complexity ~ O(number of pixels) Jagged edges, anti-aliasing Realistic images, textures, ... Examples: Paint, PhotoShop, ...

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Vector Graphics Hardware

V E C T O R

Display Controller

continuous & smooth linesno filled objectsrandom scanrefresh speed depends on complexity of the scene

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Raster Graphics Hardware

Video Controller

jaggies (stair casing)filled objects(anti)aliasing

R A S T E R

refresh speed independent of scene complexitypixel

scan conversionresolutionbit planes

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Generating graphics

Special-purpose programs Photoshop, Powerpoint, AutoCAD, StudioMax,

Maya, Blender, PovRay, …

General graphics libraries and standards Windows API, OpenGL, Direct3D,…

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What’s Our Scope?

Not a Tutorial on Commercial Software 3DMax, Maya, Photoshop, etc.

Not about Graphics Business 3D online-game, E-commerce, etc.

Graphics = Algorithm for Visual Simulation Imaging, Modeling, Rendering, Animation

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CG standards

Set of graphics functions, to be called from programming language

Access to and abstract from hardware Standardization

1975 From 2000

Display

Drivers

CG API

Input dev.

C, C++, Java, Delphi,…

Display Input dev.

Fortran, Pascal, …

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Functions

Graphics Output Primitives Line, polygon, sphere, …

Attributes Color, line width, texture, …

Geometric transformations Modeling, Viewing

Shading and illumination Input functions

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Textbook

Computer Graphics

C Version

D. Hearn and M. P. Baker 2nd Edition PRENTICE HALL

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Schedule

1st week Introduction to Computer Graphics Chapter 1

2nd week Mathematics for Computer Graphics Appendix A

3rd week Output Primitives Chapter 3

4th week Attributes of Output Primitives Chapter 4

5th week 2D Geometric Transformations Chapter 5

6th week 2D Viewing Chapter 6

7th week Midterm

8th week Term Project Proposal Presentation

9th week 3D Object Representations Chapter 10

10th week 3D Geometric and Modeling Transformations Chapter 11

11th week 3D Viewing Chapter 12

12th week Illumination Models Chapter 14

13th week Surface-Rendering Methods Chapter 14

14th week Visible-Surface Detection Methods Chapter 13

15th week Computer Animation Chapter 16

16th week Final

17th week Term Project Demo

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Assignments

Every 3 weeks #1: 2D drawing #2: 2D transformations #3: image enhancment

Windows Programming C and C++ or Java Not Using Graphics Library (OpenGL, DirectX, Java3D, etc.)

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Secrets for Success

Learn the Math and NOT JUST the HACKS

THINK before You Code

Try to Develop Visual Debugging Skills

Seek the Help It’s too Late

graphics graphics lab @ korea university cgvr.korea.ac.kr introduction to computer graphics

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