Computer science (algorithms, data structures, software engineering

Mathematics (geometry, numerical, …) Physics (Optics, mechanics, …) Psychology (Color, perception) maging = representing 2D images Modeling = representing 3D objects Rendering = constructing 2D images from 3D models Animation = simulating changes over time Object space: Image represented as geometric features Image Space: image presented on paper and Continuous Image Processing - analysis or reconstruction of objects from image data. Basically, this is the inverse of computer graphics in that it starts with the image and works from there. Image processing applies directly to the pixel grid and includes operations such as color correction, scaling, blurring, sharpening, etc. Computer Generated Imagery (CGI) - Production of imagery using computers. Includes both computer graphics and image processing.
Representations in graphics Vector and Raster Data Computer images are classified into two general types: those defined as a pixel map and those defined as one or more vector commands. In the first case we refer to raster graphics and in the second case to vector graphics. Figure 2-1, shows two images of a cross, first defined as a bitmap, and then as a set of vector commands.
The left-side image of Figure 2-1 shows the attribute of each pixel encoded in a bitmap. The simplest scheme consists of using a 0-bit to represent a white pixel and a 1-bit to represent a black pixel. Vector commands, on the other hand, refer to the geometrical elements in the image. The vector commands in Figure 2-1 define the image in terms of two intersecting straight lines. Each command contains the start and end points of the