Computer Graphics Lecture 1 July 11, 2005. Computer Graphics What do you think of? The term “computer graphics” is a blanket term used to refer to the.

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Presentation transcript:

Computer Graphics Lecture 1 July 11, 2005

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.

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.

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.

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

Two Dimensional (2D) Images

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

Three Dimensional (3D) Images

Polygons Textures / Shaders 2D Overlays Particle Systems

Q & A How did they do that?