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This study investigated the implementation of a hand model and contact simulation method for the purpose of improving the reality of object manipulation in a virtual environment. The study focused both on the hand tracking method that takes advantage of nails and also contact simulation using a deformable hand model. The manipulation of an object using a hand, is known to make more frequent use of...Show More
We propose a novel approach to haptic interact with complex inhomogeneous elastic objects like organs. In surgery simulations, representation of complex inhomogeneous elastic objects which have various physical properties and geometries is required. Also, consideration of geometric nonlinearity is required. At present, in order to simulate such objects correctly, we have to use the nonlinear FEM m...Show More
A rectangular tetrahedral adaptive mesh based corotated finite element model for interactive soft tissue simulation
2013 35th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)
Year: 2013 | Conference Paper |
Cited by: Papers (4)
In this paper, we propose a rectangular tetrahedral adaptive mesh based corotated finite element model for interactive soft tissue simulation. Our approach consists of several computation reduction techniques. They are as follows: 1) an efficient calculation approach for computing internal forces of nodes of elastic objects to take advantage of the rectangularity of the tetrahedral adaptive mesh; ...Show More
In this paper, we propose an approach to generate high quality force and deformation using a novel automatic space and time adaptive level of detail technique in combination with a parallel computation using a graphics processing unit (GPU). The elastic object is represented by a multi-resolution hierarchy of tetrahedral adaptive volume mesh. The tetrahedral adaptive volume mesh and the time step ...Show More
CAGRA: Optimal parameter setting and rendering method for occlusion-capable automultiscopic three-dimensional display
Yusuke Doyama;Atsushi Kodama;Koichi Hirota;Tomohiro Tanikawa;Michitaka Hirose;Kazuyoshi Tagawa
2010 IEEE Virtual Reality Conference (VR)
Year: 2010 | Conference Paper |
We have developed a novel automultiscopic display, CAGRA (Computer-Aided Graphical Real-world Avatar), which can provide full parallax both horizontally and vertically without imposing any other additional equipment such as goggles on users. CAGRA adopts two axes of rotation so that it can distribute reflected light all around. In our previous work, it was proved that the display can present a bla...Show More
A data compression method for impulse response deformation model
World Haptics 2009 - Third Joint EuroHaptics conference and Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems
Year: 2009 | Conference Paper |
Cited by: Papers (1)
As an approach to real-time simulation of haptic interaction with deformable objects, we proposed a record-reproduction method called dasiaimpulse response deformation modelpsila (IRDM), in which the deformation of an object shape is computed by convolving temporal sequence of interaction force with a pre-computed response of model to impulse force. Although, IRDM has an advantage that its computa...Show More
Automultiscopic display by revolving flat-panel displays
2008 IEEE Virtual Reality Conference
Year: 2008 | Conference Paper |
This paper discusses the implementation of an automultiscopic omni-directional display. By rotating a flat-panel display whose viewing angle is strictly limited, or has sharp directivity, different and independent views are presented to different viewpoints. Design parameters including the resolution of viewpoints and update rate for viewers are clarified, and the effect of the refresh rate of dis...Show More
Manipulation of dynamically deformable object
2008 Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems
Year: 2008 | Conference Paper |
Cited by: Papers (2)
An approach to realize manipulation of elastic object in virtual environment is discussed. In the approach, the behavior of elastic object during interaction is separately described by two components: rigid-body motion and elastic deformation. The component of motion is simulated by solving equations of motion, while the component of deformation is reproduced from a set of deformation sequences in...Show More
Impulse Response Deformation Model: an Approach to Haptic Interaction with Dynamically Deformable Object
2006 14th Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems
Year: 2006 | Conference Paper |
Cited by: Papers (4)
An approach to haptic interaction with dynamically deformable object is proposed. In our approach, the behavior of an object is defined by a set of temporal deformation patterns after impulse force is applied to each degree of freedom, which we call impulse response deformation model. Deformation resulting from interaction is obtained by computing convolution of the model and the history of intera...Show More
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