Introduction to Computer Graphics 1 Definitions Computer graphics
- Slides: 41
Introduction to Computer Graphics 1
Definitions • Computer graphics is “the creation and manipulation of graphics images by means of computer. ” (Marc Berger, 1986. ) • Computer Graphics: - commonly mean the creation, storage and manipulation of models and images • Interactive Computer Graphics: - user controls contents, structure, and appearance of objects and their displayed images via rapid visual feedback. 2
NOT COVERING THE FOLLOWING: - use of graphics design applications such as: paint package - adobe photoshop, CAD package - Auto. Cad, modeling pakages - 3 D studio Max, Maya, animation package – Adobe Premier , Digimation, rendering package – Renderman, POVRay but the algorithms in the above (to some extent). 3 3
Computer Graphics • “Computer Graphics is concerned with producing images (or animations) using a computer. ” rendering modeling WORLD MODEL DISPLAY 4
Rendering 5
6
Wireframe Model Skin Skeletal Model Hair Muscle Model 7 Render and Touch up
Who uses computer graphics? 8
Who uses computer graphics? Movies 9
Who uses computer graphics? Movies "Geri's Game" Academy Award-winner of the best animated short film, 1997. “Jurassic Park” - Three Academy Awards® for its ground-breaking visual and sound effects 10
Who uses computer graphics? Games 11
Who uses computer graphics? Doctors 12
Medicine and Virtual Surgery The Visible Human project 13
Who uses computer graphics? Scientists 14
Scientific Visualization and Analysis 15
Who uses computer graphics? Engineers 16
Who uses computer graphics? Engineers 17
Who uses computer graphics? You 18
Who uses computer graphics? You 19
Who uses computer graphics? 20
User Interfaces B 205 Control Console (1960) 3 D Studio MAX CAVE: Immersive and Interactive 3 D enironement 21
Who uses computer graphics? • Advertisement 22
Who uses computer graphics? • Advertisement 23
Who uses computer graphics? • Weather visualization 24
What is computer graphics about? 25
What is computer graphics about? in i o data image computer data out image traditional computing computer graphics computer vision image processing 26
What is computer graphics about? Computer graphics, as we will focus on it in this course, is about taking a computer model and producing an image of that model. 27
What is computer graphics about? Computer graphics, as we will focus on it in this course, is about taking a computer model and producing an image of that model. 28
What is computer graphics about? Computer graphics, as we will focus on it in this course, is about taking a computer model and producing an image of that model. Definitely part of the broader area of computer graphics: • We often wish to interact with that model, creating new images on the fly. • Sometimes we want to animate the model in a predetermined way (like a script) or according to a set of rules. • Also, there are issues how best to represent that model. • Of course, all this assumes a way to capture or create the model, then to finally display the images. • We shouldn’t forget the actual computation required to convert from model to image. 29
What kinds of things are modeled? 30
What kinds of things are modeled? Shape What is it? Can we approximate it with simpler shapes? 31
What kinds of things are modeled? Shape What is it? Can we approximate it with simpler shapes? Position Where is it? 32
What kinds of things are modeled? Shape What is it? Can we approximate it with simpler shapes? Position Where is it? Orientation Which way is it facing? 33
What kinds of things are modeled? Shape What is it? Can we approximate it with simpler shapes? Position Where is it? Orientation Which way is it facing? Surface properties t. What color is it? Is it shinny? Is it smooth? 34
What kinds of things are modeled? Shape What is it? Can we approximate it with simpler shapes? Position Where is it? Orientation Which way is it facing? Surface properties What color is it? Is is shinny? Is it smooth? Volumetric properties Is it dense? How does it scatter light? 35
What kinds of things are modeled? Shape What is it? Can we approximate it with simpler shapes? Position Where is it? Orientation Which way is it facing? Surface properties What color is it? Is is shinny? Is it smooth? Volumetric properties Is it dense? How does it scatter light? Lights How bright? What color? Where? Is it directional? And More … 36
Where do we get the models? 37
How do we display images? 38
What is our model isn’t like the real world? 39
What’s in between modeling and display? 40
Homework • With your own word, describe the meaning of computer graphics? 41