Digital Reproduction of Ancient Mosaics

Art often provides valuable hints for technological innovations especially in the field of Image Processing and Computer Graphics. In this chapter we survey in a unified framework several methods to transform raster input images into good quality mosaics. For each of the major different approaches in literature the chapter reports a short description and a discussion of the most relevant issues. To complete the survey comparisons among the different techniques both in terms of visual quality and computational complexity are provided. Non-Photorealistic Rendering (NPR) is a successful area of Computer Graphics and it is nowdays applied to many relevant contexts: scientific visualization, information visualization and artistic style emulation ([1],