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Film and game studios can no longer meet audience demand for visual content by increasing production budgets. Instead they are turning to procedural modeling, particularly for modeling cities. The authors review procedural modeling, examine the CityEngine tool, and study the use of procedural urban modeling in Electronic Arts' Need for Speed games.
Continuous tone images must be halftoned to be displayed on binary output devices such as printers. The ordered dither algorithm is a popular approach to halfton-ing. This algorithm uses a threshold matrix to approximate gray scale values. The arrangement of thresholds in the matrix determines texture artifacts introduced into the halftoned image. Thus, the(More)
The display of images on binary output hardware requires a halfton-ing step. Conventional halftoning algorithms approximate image values independently from the image content and often introduce artificial texture that obscures fine details. The objective of this research is to adapt a halftoning technique to 3D scene information and thus to enhance the(More)
We present a method for frame coherent texturing and hatching of 3D models with a discrete set of colors. Our technique is inspired by various artistic styles that use a limited set of colors to convey surface shape and texture. In previous research discrete color shading was produced by modifying smooth shading with a threshold function. We extend this(More)
The correct display of edges in half-toned images is nec­ essary for accurate image reproduction. This problem has been addressed by pre-processing the image to en­ hance the edges or by altering the half-toning algorithm to account for edges. In this paper we present a post­ processing edge enhancement technique that is applicar ble to all half-toning(More)
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