1. 1 Introduction to Computer Graphics

2. 2 Definitions Computer graphics is “the creation and manipulation of graphics images by means of computer.” (Marc Berger, 1986.)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 imagesComputer 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.Interactive Computer Graphics: - user controls contents, structure, and appearance of objects and their displayed images via rapid visual feedback.

3. 3 NOT COVERING THE FOLLOWING: - use of graphics design applications such as: paint package - adobe photoshop, CAD package - AutoCad, modeling pakages - 3D studio Max, Maya, animation package – Adobe Premier,Digimation, rendering package – Renderman, POVRay but the algorithms in the above (to some extent). 3

4. 4 Computer Graphics “Computer Graphics is concerned with producing images (or animations) using a computer.”“Computer Graphics is concerned with producing images (or animations) using a computer.” modeling rendering DISPLAY MODELWORLD

5. 5 Rendering

6. 6

7. 7 Muscle ModelWireframe ModelSkeletal Model Skin Hair Render and Touch up

8. 8 Who uses computer graphics?

9. 9 Movies

10. 10 Who uses computer graphics? “Jurassic Park” - Three Academy Awards® for its ground-breaking visual and sound effects "Geri's Game" Academy Award-winner of the best animated short film, 1997. Movies

11. 11 Who uses computer graphics? Games

12. 12 Who uses computer graphics? Doctors

13. 13 The Visible Human project Medicine and Virtual Surgery

14. 14 Who uses computer graphics? Scientists

15. 15 Scientific Visualization and Analysis

16. 16 Who uses computer graphics? Engineers

17. 17 Who uses computer graphics? Engineers

18. 18 Who uses computer graphics? You

19. 19 Who uses computer graphics? You

20. 20 Who uses computer graphics?

21. 21 B205 Control Console (1960) User Interfaces CAVE: Immersive and Interactive 3D enironement 3D Studio MAX

22. 22 Who uses computer graphics? AdvertisementAdvertisement

23. 23 Who uses computer graphics? AdvertisementAdvertisement

24. 24 Who uses computer graphics? Weather visualizationWeather visualization

25. 25 What is computer graphics about?

26. 26 What is computer graphics about? computer in out data image data image i o traditional computing computer graphics computer vision image processing

27. 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. 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.

29. 29 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.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.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.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.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.We shouldn’t forget the actual computation required to convert from model to image.

30. 30 What kinds of things are modeled?

31. 31 What kinds of things are modeled? Shape What is it? Can we approximate it with simpler shapes?

32. 32 What kinds of things are modeled? Shape What is it? Can we approximate it with simpler shapes? Position Where is it?

33. 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?

34. 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 tWhat color is it? Is it shinny? Is it smooth?

35. 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?

36. 36 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 …

37. 37 Where do we get the models?

38. 38 How do we display images?

39. 39 What is our model isn’t like the real world?

40. 40 What’s in between modeling and display?

41. 41 Homework With your own word, describe the meaning of computer graphics?With your own word, describe the meaning of computer graphics?