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Graphics Graphics Korea University cgvr.korea.ac.kr Introduction to Computer Graphics.

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1 Graphics Graphics Lab @ Korea University cgvr.korea.ac.kr Introduction to Computer Graphics

2 CGVR Graphics Lab @ Korea University cgvr.korea.ac.kr Computer Graphics? Image Mathematical Model Image Analysis (pattern recognition, Computer Vision) Computer Graphic ModelingImage processing

3 CGVR Graphics Lab @ Korea University cgvr.korea.ac.kr What is Computer Graphics? (1/2) Definition Producing pictures or images using a computer Example Courtesy of Tippet Studio

4 CGVR Graphics Lab @ Korea University cgvr.korea.ac.kr What is Computer Graphics? (1/2) Definition Producing pictures or images using a computer Example Courtesy of Tippet Studio

5 CGVR Graphics Lab @ Korea University cgvr.korea.ac.kr What is Computer Graphics? (1/2) Definition Producing pictures or images using a computer Example  Bugs: Courtesy of Tippet Studio

6 CGVR Graphics Lab @ Korea University cgvr.korea.ac.kr What is Computer Graphics? (1/2) Definition Producing pictures or images using a computer Example  The Final Stage: Burning the bugs Courtesy of Tippet Studio

7 CGVR Graphics Lab @ Korea University cgvr.korea.ac.kr What is Computer Graphics? (1/2) Definition Producing pictures or images using a computer Example Batman & Robin: The Love Dust Courtesy of Buf Compagnie

8 CGVR Graphics Lab @ Korea University cgvr.korea.ac.kr What is Computer Graphics? (1/2) Definition Producing pictures or images using a computer Example Batman & Robin: The Love Dust Courtesy of Buf Compagnie

9 CGVR Graphics Lab @ Korea University cgvr.korea.ac.kr What is Computer Graphics? (1/2) Definition Producing pictures or images using a computer Example Batman & Robin: The Love Dust Courtesy of Buf Compagnie

10 CGVR Graphics Lab @ Korea University cgvr.korea.ac.kr What is Computer Graphics? (1/2) Definition Producing pictures or images using a computer Example Batman & Robin: The Love Dust Courtesy of Buf Compagnie

11 CGVR Graphics Lab @ Korea University cgvr.korea.ac.kr What is Computer Graphics? (1/2) Definition Producing pictures or images using a computer Example Batman & Robin: The Love Dust Courtesy of Buf Compagnie

12 CGVR Graphics Lab @ Korea University cgvr.korea.ac.kr What is Computer Graphics? (1/2) Definition Producing pictures or images using a computer Example Batman & Robin: The Love Dust Courtesy of Buf Compagnie

13 CGVR Graphics Lab @ Korea University cgvr.korea.ac.kr What is Computer Graphics? (1/2) Definition Producing pictures or images using a computer Example Batman & Robin: The Love Dust Courtesy of Buf Compagnie

14 CGVR Graphics Lab @ Korea University cgvr.korea.ac.kr What is Computer Graphics? (2/2) Imaging Representing 2D images Modeling Representing 3D objects Rendering Constructing 2D images from 3D models Animation Simulating changes over time

15 CGVR Graphics Lab @ Korea University cgvr.korea.ac.kr Applications Display of Information Design Simulation Computer Art Entertainment

16 CGVR Graphics Lab @ Korea University cgvr.korea.ac.kr Display of Information Graphics for Scientific, Engineering, and Medical Data Medical ImageNebula

17 CGVR Graphics Lab @ Korea University cgvr.korea.ac.kr Design Graphics for Engineering and Architectural System Design of Building, Automobile, Aircraft, Machine etc. AutoCAD 2002Interior Design

18 CGVR Graphics Lab @ Korea University cgvr.korea.ac.kr Simulation Computer-Generated Models of Physical, Financial and Economic Systems for Educational Aids Flight SimulatorMars Rover Simulator

19 CGVR Graphics Lab @ Korea University cgvr.korea.ac.kr Computer Art Graphics for Artist Metacreation Painter

20 CGVR Graphics Lab @ Korea University cgvr.korea.ac.kr Entertainment Graphics for Movie, Game, VR)Virtual Reality) and etc. Final Fantasy Online Game

21 CGVR Graphics Lab @ Korea University cgvr.korea.ac.kr 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

22 CGVR Graphics Lab @ Korea University cgvr.korea.ac.kr 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,...

23 CGVR Graphics Lab @ Korea University cgvr.korea.ac.kr 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,...

24 CGVR Graphics Lab @ Korea University cgvr.korea.ac.kr Vector Graphics Hardware V E C T O R Display Controller move 10 20 line 20 40... char O char R Display list continuous & smooth lines no filled objects random scan refresh speed depends on complexity of the scene

25 CGVR Graphics Lab @ Korea University cgvr.korea.ac.kr Raster Graphics Hardware Video Controller jaggies (stair casing) filled objects (anti)aliasing R A S T E R refresh speed independent of scene complexity pixel scan conversion resolution bit planes 000000 07776 0777 000 00 0 Frame buffer

26 CGVR Graphics Lab @ Korea University cgvr.korea.ac.kr Generating graphics Special-purpose programs Photoshop, Powerpoint, AutoCAD, StudioMax, Maya, Blender, PovRay, … General graphics libraries and standards Windows API, OpenGL, Direct3D,…

27 CGVR Graphics Lab @ Korea University cgvr.korea.ac.kr 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

28 CGVR Graphics Lab @ Korea University cgvr.korea.ac.kr 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,… DisplayInput dev. Fortran, Pascal, …

29 CGVR Graphics Lab @ Korea University cgvr.korea.ac.kr Functions Graphics Output Primitives Line, polygon, sphere, … Attributes Color, line width, texture, … Geometric transformations Modeling, Viewing Shading and illumination Input functions

30 CGVR Graphics Lab @ Korea University cgvr.korea.ac.kr Textbook Computer Graphics C Version D. Hearn and M. P. Baker 2 nd Edition PRENTICE HALL

31 CGVR Graphics Lab @ Korea University cgvr.korea.ac.kr Schedule 1 st weekIntroduction to Computer GraphicsChapter 1 2 nd weekMathematics for Computer GraphicsAppendix A 3 rd weekOutput PrimitivesChapter 3 4 th weekAttributes of Output PrimitivesChapter 4 5 th week2D Geometric TransformationsChapter 5 6 th week2D ViewingChapter 6 7 th weekMidterm 8 th weekTerm Project Proposal Presentation 9 th week3D Object RepresentationsChapter 10 10 th week3D Geometric and Modeling TransformationsChapter 11 11 th week3D ViewingChapter 12 12 th weekIllumination ModelsChapter 14 13 th weekSurface-Rendering MethodsChapter 14 14 th weekVisible-Surface Detection MethodsChapter 13 15 th weekComputer AnimationChapter 16 16 th weekFinal 17 th weekTerm Project Demo

32 CGVR Graphics Lab @ Korea University cgvr.korea.ac.kr 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.)

33 CGVR Graphics Lab @ Korea University cgvr.korea.ac.kr 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

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