REALIZATION OF COMPUTER-AIDED ENVIRONMENTS FOR ORIGINAL THINKING BASING UPON RECOGNITION AND GENERATION OF THREE DIMENSIONAL IMAGES, AND EXPERIENCING OF VIRUTUAL WORLD

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In this study, we developed a few tools for supporting the derivation of conception with high level of originality using three dimensional (3D) images as the media. Here a 3D image means a digitized 3D picture stored in a 3D voxel array.(1)Recognition Several algorithms for extraction of inner structure from voxel type 3D gray picutre were developed. Thinning of gray pictures, feature extarction based on the concentration index calculated on a 3D picture, extraction of a protrusion on a curved 3D surface, 3D difference filter, etc. are included.(2)Vision expert system for 3D picture processing. The vision expert system called IMPRESS which we developed for a 2D image was extended to a 3D picture. Difficulty in this problem is the method to input a sample figure. We developed a few alternatives including a sketch on a MIP image and a fast and approximated version of the volume rendering.(3)Model for manipulating virtual objects in 3D virtual space with the hand in real world. Using a glove-like device with sensors to measure angles among parts of fingers, grasping, carrying and stacking virtual objects were developed, and tested practically.