1. Computer Graphics Lecture 1 July 11, 2005

2. Computer Graphics What do you think of? The term “computer graphics” is a blanket term used to refer to the field of computer science specializing in computer generated images.

3. What is an image? An image is a 2-dimensional array of pixels (dots of color). If the resolution (density of the dots) is high enough, the pixels blend together seamlessly to form the image the eye sees.

4. 155/255 Red 112/255 Green 46/255 Blue pixel in an imagepixel on a screen On a computer monitor, a pixel is represented by the additive combination of the 3 primary colors: red, green, and blue in varying brightness.

5. Computer Generated Images (CGI) How do computers generate images? Data Rendering or Drawing Program Image(s)

6. Two Dimensional (2D) Images

7. Composited Images / Icons Shapes (Circles, Squares, Lines, Curves) Text (various Fonts) Gradients and other Fills

8. Three Dimensional (3D) Images

9. Polygons Textures / Shaders 2D Overlays Particle Systems

10. Q & A How did they do that?