3D shape evaluation analysis by synthesis in virtual space for collaboration

It is indicated that there is a high possibility of disagreement between 3D shape evaluation in virtual space and that in real space. In our previous paper (M. Okubo and T. Watanabe, 2000), a 3D shape evaluation support system in virtual space was proposed. Because the system integrates the visual and gazing line-motion information in virtual space and tactile information in real space, each piece of information can be controlled for analysis of 3D shape evaluation in virtual space by synthesis. On the other hand, there are cases in which long distance designers evaluate the same 3D shapes through the Internet. In this case, the time delay of information must have occurred. From this point of view, the influence of visual information with time delay on the 3D shape evaluation in virtual space is investigated by using the proposed system. A sensory evaluation by paired comparison of 3D shapes and a questionnaire are carried out in virtual space with and without time delay and in real space. The results show that the visual information with time delay affects the shape evaluation in virtual space, especially the evaluation of the details of shapes.