Tadahiro Fujimoto

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Trees are one of the most important elements of natural landscapes. Therefore, in computer graphics, there is a great demand for methods to realize the natural representation of trees in virtual landscapes in various fields such as the entertainment industry or environmental assessment in construction. Many studies have been made on techniques in which the(More)
This work presents a method that combines two techniques: L-systems and Genetic Algorithms (GA) to search for a rewriting expression describing leaf shapes. An L-system is used to construct the shape of a given rewriting expression and GA is used to search for the rewriting expression's fitting parameters. The replacement of real value parameters with(More)
Research on methods for representing natural objects and phenomena by computer graphics (CG) has been steadily broadening the scope of represented objects in recent years. Among such research, visual simulation of rocky scenery is an important issue that has a wide range of applications related to visual contents, such as in landscape simulation. In the(More)
Non-photorealistic rendering has become an important research topics in computer graphics in recent years. We have previously proposed a non-photorealistic rendering method to generate Suibokuga-like images of trees. This method was suitable only for representing trees in Mokkotsuho paintings because the images were generated from three-dimensional skeleton(More)
In this paper, we propose a framework of “fractal deformation” using displacement vectors based on “extended Iterated Shuffle Transformation (ext-IST)”. An ext-unit-IST is a one-to-one and onto mapping that is extended from a unit-IST, which we have proposed, and is basically defined on a code space. When the mapping is applied on a geometric space, a(More)
We present an optimization of the water column-based height-field approach of water simulation by reducing memory footprint and promoting parallel implementation. The simulation still provides three-dimensional fluid animation suitable for water flowing on irregular terrains, intended for interactive applications. Our approach avoids the creation and(More)
Simulation of weather scenery in computer graphics (CG) is an important issue that has a wide range of applications related to image content, such as in movies and in various landscape simulations. In general, research to date into CG lightning has focused on generating a lightning pattern by applying probability and statistics techniques, which do not(More)