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Modern computer game engines have reached a level of visual quality that makes them usable for other tasks and applications than mere entertainment. In this paper we will present our prototype of an interactive tool for landscape architecture based on the well-known CryENGINE and the game Farcry. We will present the steps necessary to automatically derive a valid Farcry level for real GIS data and...
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To achieve the real-time requirement of realistic deformable modelling, it is necessary to use the acceleration techniques such as GPU computing for FEM and employ the feasible hybrid structures in a virtual surgery simulation system. In this paper, we present a linear or nonlinear deformable model of soft tissue. In addition to the efficient meshing and basic finite element method, the high computation...
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This paper deals with interactive multimedia applications design whose main function is growing due to the users' needs that expect increasingly complex scenarios under a high level of interactivity. Digital media technology is becoming an integral part of our daily activities.Using multimedia objects in building rich and interactive content for iDTV (Interactive TV) is a complex task. In order to...
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Rehabilitation for upper limbs is important for elderly people, people who have suffered a stroke and so on. In recent years, the needs for rehabilitation support systems are increasing, which use robot technology and virtual reality technology. Applying these technologies make efficient rehabilitation possible. But there was few rehabilitation support robot system for 3-D training with high safety...
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We propose a method for modeling ununiform illumination conditions using multiple-camera-based marker observations. In computer graphics applications, multiple-camera-based object reconstruction is becoming popular for modeling 3D objects. However, geometrical and photo-metrical calibrations among multiple cameras still require high computational cost. We employ multiple observations of a spherical...
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We propose an advanced visual hull technique to compensate for outliers using the reliabilities of the silhouettes. The proposed method consists of a foreground extraction technique based on the generalized Gaussian family model and a compensated shape-from-silhouette algorithm. They are connected by the intra-/inter-silhouette reliabilities to compensate for carving errors from defective segmentation...
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The requirement of tetrahedral mesh generation algorithm, which is a prerequisite of many soft tissue simulation methods, becomes very strict because of the real-time requirement of the simulation. Aiming to speed up the computation in the simulation, we propose a revised Delaunay algorithm which makes a good balance of quality of tetrahedra, boundary preservation and time complexity, with many improved...
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Dental calculus, hardened plaque on the teeth, is a cause of periodontitis, or gum diseases in the mouth. For dentists and dental hygienists, it is an important task to remove the calculi from patients. The task is called "tooth scaling" and the calculi just beside the gum and between the tooth and gum are usually removed by using a hand scaler. Since the scaling by a hand scaler requires...
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In this paper, we describe a development of the motion visualization system which make us understand intuitively a series of action of an actor by coordinates information obtained from motion capture system (MC system). The MC system we use is wireless magnetic type and has 11 sensors each which give us position and angle data. To visualize the motion of limbs, we transform momentary position and/or...
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This paper investigates the use of tangible user interfaces (TUIs)for controlling multimedia systems. It presents a preliminary study where a tangible device called ARemote is used to choose TV channels in a relatively large list by performing 3D gestures. Three different interaction strategies, that either relies on crossing or scrolling, have been developed and tested in a controlled experiment.
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Even though gaze control is relatively well known as a human computer interaction method, gaze control is not a widely used technique, partly due to several usability issues. However, there are applications that can be improved with the use of eye gaze control. Combining concepts from the Augmented Reality (AR) research domain with concepts from gaze recognition and input gives possibilities to create...
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A higher sense of presence and interaction capability may be provided to a user when adopting 3D stereoscopic visualization compared to 2D viewing. Depth perception and task performance may however greatly vary for different display technologies, while available budget and application context constraint system design and approach selection. This work intends to contribute in assessing benefits of...
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Although an immersive projection display provides a high quality of presence, it requires a large space and a high cost to equip the facility. This paper proposes a room-sized immersive projection display system named CC room. In this system, the rounded corner of an ordinary room was used for the screen, and the projectors equipped with the fish-eye lenses were used to project wide angle images....
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In this paper, a novel display system named "active display" is proposed for bi-directional telexistence system. It consists of a 5-bar spherical parallel mechanism, a LCD and 3 actuators. The LCD is moved by the parallel mechanism along a spherical surface whose center is at the head of the operator. Its motions are synchronized with a remote camera system. As a result, the operator can...
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In our previous paper, we proposed an augmented reality display based on the pepper's ghost configuration that was able to display two-dimensional images on different image plane at different physical depths. In this paper, we propose the next generation of the display. Our latest display is able to display images at different physical depths simultaneously, thus it is able to display virtual objects...
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With the use of an immersive display system such as the CAVE, the user is able to perceive a 3D environment realistically. However, the interaction on such systems faces inherent difficulties such as inaccurate tracking, lack of depth cues, and unstable spatial manipulation without the sense of touch. In this paper, we propose a see-through lens interface using a PDA (Personal Digital Assistant) for...
