since 1995 spring (on other site), last up date Oct. 1998.
Virtual System and MaltiMedia(VSMM) '95 in Gifu ('95.9, GIFU)
Block Manipulation with Hand in Virtual Space
This paper describes an interactive manipulation system with a
computer generated hand in a virtual work space. We can grasp, move
and throw virtual objects in the similar way as real ones. In order to
represent the behavior of virtual objects with reality, it is
necessary to introduce a precise physical model. However, the more
precisely a physical model is made, the more computation time is
required to generate CG images according to motion of the
hand. Therefore, we developed a new geometric model for block
manipulation with a hand in virtual space. In this model, three basic
hand actions are concerned such as grasping, moving and
releasing. Since simplified gravity and inertia are introduced in the
model, the blocks are naturally moved with interactive rate. This
model has also a simplified interference check function among
objects.
Computational Engineering and Sience (JSCES) ('96.5, TOKYO)
The Model for Manipulation with Hand and
Behavior of Virtual Object in Virtual Space
This paper describes an interaction model for objects
manipulation with a computer generated hand in a virtual work
space. If we can grasp, move and release virtual objects with hand in
the similar way as real ones, we are able to have many experiences in
various virtual worlds. However, the more precisely a physical model
is made, the more computation time is required to generate CG images
corresponding to the motion of the hand. Therefore, we developed a new
model for objects manipulation with a virtual hand. Since gravity and
inertia are introduced in a simplified way in the model, the objects
are naturally moved with interactive rate in a picture generated by
graphics workstation.
Maltimedia and Virtual Environments (MVE, IEICE Tech. Rep.) ('97.3 TOKYO)
A Study of Object Manipulation with Both Hands in Virtual Spaces
This paper describes a model and a system for handling virtual
objects with both virtual hands. We have studied an interaction model
for one hand and one rigid object in virtual space. In this paper, we
extend this single hand model to a new one with
both-hands-cooperation. This model is reduced to a model for one hand
manipulation by introducing a basis hand, when two hands touch one
same object. Basis hand is defined by a set of weighted average values
of locations and movements of both hands with consideration of the
nunber of touched points for an object. Using the system with the
extended model, one can manipulate an object with both hands and can
handle two objects with each hand.
Pattern Sensing(?) (SICE Tech. Rep.) ('97.4 NAGOYA)
A study of a model for cooperative manipulation of virtual objects and
virtual tools by both hands
This paper describes a model for handling virtual objects with both
virtual hands and a data-structure for manipulating virtual tools with
a hand. We have studied an interaction model for one hand and one
rigid object in virtual space. In this paper, we extend this single
hand model to a new one with both-hands-cooperation. This model is
reduced to a model for one hand manipulation by introducing a basis
hand. We propose a data structure of a virtual tool for manipulation
with a hand. This keeps the information on the shape of parts of the
tool and knowledge for manipulating objects with a hand. Using the
system with the extended model and the data structure for tool, one
can handle an object with both hands, and can manipulate a tool with a
hand.
VRSJ Second Annual Conference ('97.9 NAGOYA)
Knowledge Database for Manipulation of Tools with a Virtual Hand in
Virtual Space
This paper describes a knowledge database for manipulating
virtual tools with a virtual hand. We propose a data structure of a
virtual tool for manipulation with a hand. The data have the
knowledge, such as the shape of parts of the tool, a model for
manipulation of the tool with a hand, and a model for manipulation of
objects by the tool. By using the knowledge database, we developed a
system manipulating virtual tools with a virtual hand.
Graphics and CAD (G&CAD, IPSJ Tech. Rep.) ('98.4 TOKYO)
Knowledge and Model for Manipulation Using Virtual Tools
with a Virtual Hand
This paper describes a generalized knowledge structure for virtual
tools used in virtual world with a hand. The proposed model contains
the knowledge, such as the shape of the tool, how to use the tool with
a hand, and how to manipulate objects by the tool. Introducing this
kind of knowledge structure, we can separate the models for virtual
tools from virtual manipulation system itself, so that any type of
tools is introduced in a very simple manner.
IEICE paper, Vol.J81-D-II, No.5, pp.822-831 ('98.5)
A Model for Manipulation of Objects with Virtual Hand in 3-D Virtual Space
This paper describes a virtual objects manipulation system with a
virtual hand. It is necessary that we can grasp, move and release
virtual objects with hand in the similar way as real ones in order to
have many experiences in various virtual worlds. Therefore, we
developed a new model for objects manipulation with a virtual
hand. Basic hand actions such as grasping, moving and releasing are
implemented and gravity and inertia are introduced in a simplified way
in the proposed model. The objects are naturally moved with
interactive rate in a picture generated by graphics workstation.
IPSJ paper, Vol.39, No.5, pp.1334-1342 ('98.5)
A Model for Cooperative Manipulation of Virtual Objects with Both Hands
This paper describes a model for cooperative handling virtual objects
with both virtual hands. We have been studying
an interaction model for one hand to manipulate one rigid object in
virtual space. In this paper, we extend this model to
a new one for both-hands-cooperation. This model can be reduced to
a model for one hand manipulation by introducing a
"integrated hand", when two hands touch the same object.
The integrated hand is defined by a set of
weighted average values of locations and movements
of both hands by considering the number of touched points to
an object. Using the system of the extended model, one an operator
manipulate an object with both hands and also handle
two objects with each hand.
VRSJ paper, Vol.3, No.3, pp.167-176 (1998.9).
Knowledge and Model for Manipulation Using Tools with a Virtual Hand
in Virtual Space
This paper describes a generalized data structure for virtual tools
used in virtual world with a hand. The proposed model contains the
knowledge, such as the shape of the tool, how to use the tool with a
hand, and how to manipulate objects by the tool. Introducing this kind
of data structure, we can separate the models for virtual tools from
virtual manipulation system itself, so that any type of tools is
introduced in a very simple manner.