| OCR Text |
Show 20 raster display. The data structures for a color texture map and color valu ar shown in Figure 8. 3.1.2 Generation of Color Maps A variety of methods have been explored for generating color maps. Several of those methods are described here, including procedural models, paint programs, stochastic models, digitizing, and image synthesis. Many textures that have a regular structure can be easily created using a procedural model. Procedural models can produce replicated features such as brick and tile, iterative functions make good natural objects such as leaves and flowers, and fractals can model irregular surfaces such as landscapes or mountains. A paint program uses a raster display and an interactive device to allow the user to draw or paint an image. The user is given a selection of brushes which COLORMAP = ARRAY (O .. Size,O .. Size] OF Color; Color = RECORD red : integer; green : integer; blue : integer; END; Figure 8: Definition of a Color Texture Map |
