Emphasis and focussing techniques are designed to consider the importance of objects within the rendering process. Such techniques are essential in medical education and therapy planning systems. Non-photorealistic rendering techniques, such as silhouette lines, are essential in this context as they convey the shape of objects without occluding large areas. We discuss emphasis and focussing by ...

THE ABUNDANCE and variety of man's food depend upon his control over environment. For primitive tribes this meant success in hunting and fishing, and discovery and discriminating use of roots, leaves, fruit, and seeds of wild plants. Later, as animals were domesticated and agriculture got under way, control over environment came to mean good management of crops and flocks. Today for a large par...

The evolution and structuring of plant communities is governed by local plant-to-plant interaction. It has been shown that the individual variability of the organisms and the spatial neighbor constellation is essential for plant system dynamics. Therefore, several spatially explicit individual-based model approaches for plant communities have been developed in the last decades. Among these the ...

Despite the significant advances in rendering, we are far from being able to automatically generate realistic and predictable images of organic materials such as plant and human tissues. Creating convincing pictures of these materials is usually accomplished by carefully adjusting rendering parameters. A key issue in this context is the simulation of subsurface scattering. Current algorithmic m...

In this paper we show how to combine and extend state-of-the-art computer graphics algorithms for realistic illumination of vegetation. Our main target are real-time rendering environments, namely the Lenné3D visualization system. We focus on plants near the viewer where we separate the rendering equation to model the different lighting effects: Direct sun light is handled by advanced fragment ...

We present a novel framework for non-photorealistic rendering (NPR) based on view-dependent geometric simplification techniques. Following a common thread in NPR research, we represent the model as a system of particles, which will be rendered as strokes in the final image and which may optionally overlay a polygonal surface. Our primary contribution is the use of a hierarchical view-dependent ...