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Computer Graphics Introduction I. A Survey of Computer Graphics. What is computer graphics? Interactive computer graphics The history of computer graphics Computer graphics applications Device. What is Computer Graphics?. Some possible definitions:

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Computer Graphics Introduction I

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Computer graphics introduction i

Computer Graphics

Introduction I


A survey of computer graphics

A Survey of Computer Graphics

  • What is computer graphics?

  • Interactive computer graphics

  • The history of computer graphics

  • Computer graphics applications

  • Device


What is computer graphics

What is Computer Graphics?

  • Some possible definitions:

    • Approaches, Methods, Technics and Tools for virtual world visualization

    • Generating 2D images of a 3D world represented in computer

  • Main tasks

    • Modeling: construct the 3D model of the scene

    • Rendering: compute the color of each pixel

    • Animation


What is computer graphics 1 2

What is Computer Graphics? (1/2)

Computer graphics generally means creation, storage and manipulation of models and images

Such models come from diverse and expanding set of fields including physical, mathematical, artistic, biological, and even conceptual (abstract) structures

Frame from animation by William Latham, shown at SIGGRAPH 1992. Latham uses rules that govern patterns of natural forms to create his artwork.


What is computer graphics 2 2

William Fetter coined term “computer graphics” in 1960 to describe new design methods he was pursuing at Boeing

Created a series of widely reproduced images on pen plotter exploring cockpit design, using 3D model of human body.

What is Computer Graphics? (2/2)

“Perhaps the best way to define computer graphics is to find out what it is not. It is not a machine. It is not a computer, nor a group of computer programs. It is not the know-how of a graphic designer, a programmer, a writer, a motion picture specialist, or a reproduction specialist.

Computer graphics is all these – a consciously managed and documented technology directed toward communicating information accurately and descriptively.”

Computer Graphics, by William A. Fetter, 1966


What is interactive computer graphics 1 3

What is Interactive Computer Graphics? (1/3)

User controls contents, structure, and appearance of objects and their displayed images via rapid visual feedback

Basic components of an interactive graphics system

input (e.g., mouse, tablet and stylus, force feedback device, scanner, live video streams…)

processing (and storage)

display/output (e.g., screen, paper-based printer, video recorder, non-linear editor…)

First truly interactive graphics system, Sketchpad, pioneered at MIT by Ivan Sutherland for his 1963 Ph.D. thesis

Sketchpad in 1963. Note use of a CRT monitor, light pen and function-key panel.


What is interactive computer graphics 2 3

Before Sketchpad, output via plotters/printers, input via keypunch, both in batch

What is Interactive Computer Graphics? (2/3)

Batch (1950s – now)

Card punching (left). IBM 704 (right) took up a whole room and was capable of about 4,000 arithmetic operations/second.

Cool facts: Whirlwind, built in early 50’s at MIT, cost $4.5 million and could perform 40,000 additions/second. Mac 512K, list price $3,195 in 1984, could do 500,000.


The graphics process

The Graphics Process


Modeling

Modeling

Modeling with Maya


Modeling1

Modeling

Modeling from image


Modeling2

Modeling

The tree model

(a) without leaves (b) with leaves


Modeling geometry processing

Modeling---Geometry Processing


Rendering

Rendering

Indirect diffusion

Caustic effect


Rendering1

Rendering

“A Rapid Hierarchical Rendering Technique for Translucent Materials”. Jensen, Siggraph’2002


Rendering2

Rendering


Questions

Questions

  • Graphics Vs. Image ?

    - geometric elements and attributes

    - pixel arrays

  • Computer Graphics Vs. Image Processing

    • CG : 3D Models ->rendering -> images

    • I. P : 2D images ->analysis->models(other information, special effects...)


The history of computer graphics

The History of Computer Graphics

Pioneer: Ivan Sutherland

1963: Sutherland’s PhD Thesis:“Sketchpad: A Man-machine Graphical Communications System.”, MIT,1963

First time used“Computer Graphics”. CG started to be a novel and independent scientific branch.


Pioneer ivan sutherland

Pioneer:Ivan Sutherland

  • First truly interactive graphics system, Sketchpad, pioneered at MIT by Ivan Sutherland for his 1963 Ph.D. thesis

Sketchpad in 1963. Note use of a CRT monitor, light pen and function-key panel.


The history of computer graphics1

The History of Computer Graphics

  • Poineer: Ivan Sutherland

  • 1962: Pierre Bezier put forward “Bezier curve” for the representation of space curve

  • 1967: Wylie added lighting effect in objects representation

  • 1969: Xerox developed GUI (Graphic User Interface)

  • 1973: Richard Shoup invented Raster-Scan Display

  • The great improvement of graphic techniques

    • Phong lighting model(1973);Texture mapping(1974);Ray tracing(1980);Radiosity(1984)…


The history of computer graphics2

The History of Computer Graphics

  • Industry

    • ILM(Industrial Light and Magic): an Academy Award winning motion picture visual effects company, 1975

    • SGI (Silicon Graphics, Inc): 1982

    • Pixar 1986

    • AutoDesk, Adobe

  • Display card

    • 1994: the first PC display card --- by 3DLabs

    • 1995.11: Voodoo --- by 3DFx

    • 1999: Geforce256, the first GPU --- by nVidia

    • nVidia and ATI

      • Geforce 8800、Radeon HD 2900 XT


The history of computer graphics3

The History of Computer Graphics

  • Graphics Standard

    • GKS(Germany, 1970’s); PHIGS(ISO, 1986); GKS-3D(1988)

    • OpenGL(SGI, 1992); DirectX(Microsoft); Java3D(Sun)

  • Graphics Application Software

    • 3DS Max, Maya, LightWave 3D

    • Renderman

    • AutoCAD, Solid Work


Computer graphics applications

Computer Graphics Applications

  • Computer Aided Design/Manufacturing

  • Entertainment

  • Education&Science and Training

  • Visualization in Scientific Computing

  • Graphical User Interface

  • ……


Computer aided design manufacturing cad cam

Computer Aided Design/Manufacturing (CAD/CAM)

  • Computer aided design in airplane, car, watercraft, architecture, costume, toy…


Cad cam

CAD/CAM

  • Boeing 777(1990.10 – 1994.4)

    • All the designing work is in computer graphics stations and terminals

    • No paper

  • Boeing 747(comparing)

    • 16320 meters paper!


Cad cam1

CAD/CAM

Computer aided design/Manufacturing in airplane


Cad cam2

CAD/CAM

Computer aided architecture design


Cad cam3

CAD/CAM

Computer aided design in shoe Manufacturing


Entertainment

Entertainment

  • Movies, Animations

  • Games

  • NPR (Non-Photorealistic Rendering)

  • ……


Special effects in movie

Special Effects in Movie

Jurassic Park(1993)


Special effects in movie1

Special Effects in Movie

Titanic (1997)


3d animation movie

3D Animation Movie

Toy story (1995)

Monster’s Inc. (2001)


3d animation movie1

3D Animation Movie

Hair

Skin

Final Fantasy (2001)


Computer graphics introduction i

Beijing Olympics opening ceremony


Games

Games


Npr non photorealistic rendering

Toon Shading

NPR (Non-Photorealistic Rendering)

Calligraphy generated using computers


Education science and training

Education & Science and Training

  • Computer Aided Education and Science

    • Computer simulating the phenomenon in biology, geography, physics, chemistry, medicine, political social, economy and other sciences

  • Computer Aided Training

    • System for training of ship captains, aircraft pilots …


Computer graphics in geography

Computer Graphics in Geography

  • Terrain Generation

NMT

Fractal models

Aerial views

Landsat


Google earth

Google Earth


Computer graphics introduction i

Structure of Protein


Computer aided training

Computer Aided Training


Computer graphics introduction i

War games


Visualization in scientific computing

Visualization in Scientific Computing

  • Producing graphical representations for scientific, engineering and medical data sets and processes


Application hydrodynamic

Application --- Hydrodynamic

The air current around a car


Application hydrodynamic1

Application --- Hydrodynamic


Application weather

Application --- Weather

The isolines exhibit the distribution of atmospheric pressure

http://www.ssec.wisc.edu/~billh/vis5d.html


Application medical

Application --- Medical

The visible human project


Graphical user interface gui

Graphical User Interface(GUI)

3D operating system


Graphic devices in computer system

Graphic Devices in Computer System


Graphic devices in computer system1

Graphic Devices in Computer System

  • CPU

    • CPU implements all kinds of computations about graphics such as description, construction and modification

  • GPU(Graphic Processing Unit)

  • Video Display Devices

  • Input Devices


Video display devices

Video Display Devices

  • Primary Output Device

    • Cathode ray tube(CRT) based display

    • Liquid-Crystal Display

    • Plasma panels

  • Steroscopic Display

  • Three Dimensional Viewing Devices


Steroscopic viewing devices

Steroscopic Viewing Devices


Three dimensional viewing devices

Three Dimensional Viewing Devices


Three dimensional viewing devices1

Three Dimensional Viewing Devices

  • Transport 3D display system

  • built by Hitachi Human Interaction Laboratory (HHIL)


Graphic devices in computer system2

Graphic Devices in Computer System

  • CPU

  • GPU(Graphic Processing Unit)

  • Video Display Devices: output devices

  • Input Devices


Input devices

Input Devices

  • Primary Input Devices

    • Keyboard, Mouse, Trackball, Spaceball, Joysticks, Digitizers, Light Pen, Scan machine, Touch panel, Voice System

    • Data Gloves, Sensor, Tracker, Force Feedback


Computer graphics introduction i

3D mouse

Data glove

Force Feedback Device


Computer graphics introduction i

Important conference:

SIGGRAPH

(Special Interest Group on GRAPHics and Interactive Techniques)


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