Emotion, Expression, Explanation
Computational Aesthetics for Rendering Virtual Scenes on 3D Stereoscopic Displays
László Szirmay-Kalos – Pirkko Oittinen – Balázs Teréki
Computer graphics builds virtual scenes that are rendered presenting images to the user. Both the virtual world and the image are represented by numbers in the computer, and there are many different possibilities to define a mapping between these numbers. What we usually need is a meaningful image that can be interpreted by the user without reading lengthy user manuals. To reach this goal, we use analogies like photography in photorealistic rendering,1 drawing or painting in illustrative rendering,2 X-ray, flows, etc. in abstract data visualization, because such images are natural and need no additional explanation (Figure 1). The analog process uses not only the primary data of the virtual scene but also additional parameters, called studio objects, defining how rendering should take place. Studio objects include camera and light parameters in photorealistic image synthesis, and drawing or hatching styles in illustrative rendering. Different studio object settings lead to different images that are better or poorer in characterizing the scene. To find good studio object settings that lead to expressive images, users usually initiate a long manual search based on trial and error.
Figure 1: Images obtained with photorealistic (left) and illustrative (right) rendering methods
← 187 | 188 → This long procedure can be replaced or helped by automatic algorithms that search for good rendering parameters. To support the search process, the quality of the images should be characterized by numeric values, and we...
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