The expression of animals and natural phenomena as simulated by computer graphics can be expected to enhance the realism of landscape simulation, virtual reality, etc. In this paper, a model of bird flight model animated in real time is proposed by taking aerodynamics into consideration. In this model, a bird flies by the wingbeat motion and using its tail feathers. Furthermore, target points are set in the space and the bird's orientation and flapping are adjusted such that the bird passes through these target points in sequence. This makes it possible to have the bird fly along an arbitrary path.

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We propose a new technique for visually comparing the similarities between volume data sets by using Critical Point Graph (CPG) and Character Recognition Technique (CRT). Critical Points (CPs) represent feature points inside volume data and, CPG is a graph generated by connecting these points using streamlines based on vector field information. Passing Voxel Method (PVM) is a graph comparison technique which allows the visualization of both similarities and differences between two volume data. However, PVM has some limitations in its ability to judge similarities. Taking into consideration that streamlines of CPG are composed of small straight line segments, we have investigated the use of Directional Element Feature (DEF), usually used in CRT, by extending this technique for use in PVM in order to overcome some of its limitations.

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Hologram image is so realistic that various images can be displayed at stereoscopic image in three dimensional space even though they are illusion. The main subject of this paper is to express the meaning of our existence using the hologram image. We succeeded to present the memory of human life such as feeling of happiness, brightness and silence of our life by a series of hologram works of “A memory of a Stone” using the pulse laser holographic image and made clear the efficiency of this method. A stone named “Sand Rose” is the symbol of our self-existence.

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