Language：Japanese   Publisher：東京 : 電気学会  

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Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I033518036

Publishing type：Research paper (international conference proceedings)  

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Publishing type：Research paper (international conference proceedings)  

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Publishing type：Research paper (scientific journal)  

© 2020, OWZ. Simulations of multi-body dynamics for computer graphics, 3D game engines, or engineering simulations often involve contact and articulated connections to produce plausible results. Multi-body dynamics simulations generally require accurate contact detection and induce high computational costs because of tiny time increments. As higher accuracy and robustness are continually being sought for engineering purposes, we propose an improved multi-body dynamics simulator based on an impulse method, specifically an energy-tracking impulse (ETI) algorithm that has been modified to handle particle-discretized rigid-body simulations. In order to decrease the computational costs of the simulations, in the current work, we assume a fixed moderate time increment, allowing multiple-point contacts within a single time increment. In addition to that, we distinguish the treatment between point-to-point and multiple-point contacts, which include edge-to-surface and surface-to-surface contacts, through an additional sub-cycling iterations. The improved ETI method was verified with analytical solutions of examples with single-body contact, a frictional slip, and a rolling contact. Moreover, the method was also validated with an experimental test of a line of dominoes with multiple-point contacts. Finally, a demonstration simulation with bodies of complicated shape subjected to a large number of constraints is given to show the optimum performance of the formulation.

DOI： 10.1007/s40571-020-00326-5

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Authorship：Lead author   Publishing type：Research paper (scientific journal)  

© 2020 The Institute of Electrical Engineers of Japan. The price of crops depends on the grade. The grade is determined from various factors such as color, shape, size, and scratches. It takes a lot of time and effort if farmers decide the grade. This study aims to automate shape grade judgement. In the prior method, binarization and contour extraction are performed on the tomato image to define features called flatness, variant, sharpness, and irregularity, and a threshold is set for each grade. However, due to the correlation between the features, the grade judgement has not been made with sufficient accuracy. In this study, we propose several methods focusing on contour features and compare these accuracies.

DOI： 10.1541/ieejeiss.140.1134

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J-GLOBAL

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Publishing type：Research paper (scientific journal)  

© 2019, The Author(s). Identification and quality assurance of stem cells cultured in heterogeneous cell populations are indispensable for successful stem cell therapy. Here we present an image-processing pipeline for automated identification and quality assessment of human keratinocyte stem cells. When cultivated under appropriate conditions, human epidermal keratinocyte stem cells give rise to colonies and exhibit higher locomotive capacity as well as significant proliferative potential. Image processing and kernel density estimation were used to automatically extract the area of keratinocyte colonies from phase-contrast images of cultures containing feeder cells. The DeepFlow algorithm was then used to calculate locomotion speed of the colony area by analyzing serial images. This image-processing pipeline successfully identified keratinocyte stem cell colonies by measuring cell locomotion speed, and also assessed the effect of oligotrophic culture conditions and chemical inhibitors on keratinocyte behavior. Therefore, this study provides automated procedures for image-based quality control of stem cell cultures and high-throughput screening of small molecules targeting stem cells.

DOI： 10.1038/s41598-019-55279-4

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Language：English   Publishing type：Research paper (scientific journal)  

This study describes the application of two main improvements in highly viscous fluid simulations using the smoothed particle hydrodynamics (SPH) method: an implicit time integration scheme to overcome the problem of impractically small time step restriction and the introduction of air ghost particles to fix problems regarding the free surface treatment.

DOI： 10.1007/s40571-019-00231-6

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Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：INT CENTER NUMERICAL METHODS ENGINEERING  

Catastrophes involving mass movements has always been a great threat to civilizations. We propse to simplify the behavior of the mass movement material as a highly viscous fluid, possibly non-Newtonian. In this context, this study describes the application of two improvements in highly viscous fluid simulations using the smoothed particle hydrodynamics (SPH) method: an implicit time integration scheme to overcome the problem of impractically small time-step restriction, and the introduction of air ghost particles to fix problems regarding the free-surface treatment. The application of a fully implicit time integration method implies an adaptation of the wall boundary condition, which is also covered in this study. Furthermore, the proposed wall boundary condition allows for different slip conditions, which is usually difficult to adopt in SPH. To solve a persistent problem on the SPH method of unstable pressure distributions, we adopted the incompressible SPH [1] as a basis for the implementation of these improvements, which guarantees stable and accurate pressure distribution. We conducted non-Newtonian pipe flow simulations to verify the method and a variety of dam break and wave generated by underwater landslide simulations for validation. Finally, we demonstrate the potential of this method with the highly viscous vertical jet flow over a horizontal plate test, which features a complex viscous coiling behavior.

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Language：English   Publishing type：Research paper (international conference proceedings)  

© 2019 Taylor & Francis Group, London. The present work shows the application of the Smoothed Particle Hydrodynamics (SPH) on non-Newtonian fluids for simulating the injection of a cementitious material into underground caves to reinforce the soil. In special, it presents two main improvements over the already established SPH formulation: an implicit time integration scheme to overcome the problem of impracticable small time step restriction in highly viscous fluid simulation, and the introduction of air ghost particles (AGP) to fix problems on the free-surface treatment. This project utilizes the Incompressible SPH (ISPH) as a basis for the implementation of such improvements, which guarantees a stable and accurate pressure distribution. We validate the proposed implicit time integration scheme with pipe flow simulations and the free-surface treatment with a simple hydrostatic problem. Also, dam break numerical simulations using the proposed method resulted in very good agreement with experimental data. At last, we demonstrate the potential of this method with the highly viscous vertical jet flow over a horizontal plate validation test, which shows a complex viscous coiling behavior.

DOI： 10.1201/9780429327933-48

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：WILEY  

© 2018 Wiley Periodicals, Inc. After the Great East Japan Earthquake Tsunami, new Tsunami disaster-prevention and mitigation methods for the next millennium Tsunami are actively being discussed. Consequently, the methods have highlighted the importance of both hard disaster-prevention method, which means direct prevention using infrastructure such as breakwater, and soft disaster-prevention method, including disaster-prevention education. In this paper, a visualization and polygonization system that can be effectively utilized for Tsunami disaster prevention is proposed for large-scale particle simulation. The system includes two important features, such as engineering-purposed visualization and polygonization for hard and soft tsunami disaster-prevention methods, respectively. Moreover, the system can handle the large-scale particle simulation data that are computed by a high-performance computer via an offline on-demand tool without data transfer.

DOI： 10.1002/ecj.12050

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Language：Japanese   Publishing type：Research paper (scientific journal)  

© 2017 The Institute of Electrical Engineers of Japan. After the Great East Japan Earthquake Tsunami, new Tsunami disaster-prevention and mitigation methods for the next millennium Tsunami are actively being discussed. Consequently, the methods have highlighted the importance of both hard disaster-prevention method, which means direct prevention using infrastructure such as breakwater, and soft disaster-prevention method, including disaster-prevention education. In this paper, a visualization and polygonization system that can be effectively utilized for Tsunami disaster-prevention is proposed for large-scale particle simulation. The system includes two important features, such as engineering-purposed visualization and polygonization for hard and soft tsunami disaster-prevention methods, respectively. Moreover, the system can handle the large-scale particle-simulation data that is computed by a high-performance computer via an offline on-demand tool without data transfer.

DOI： 10.1541/ieejeiss.137.1422

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J-GLOBAL

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Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：WORLD SCIENTIFIC PUBL CO PTE LTD  

© 2016 World Scientific Publishing Company. The 2011 off the Pacific coast of Tohoku Earthquake was one of the most powerful earthquakes on record in Japan and the huge tsunami caused by the earthquake inflicted extensive damage to the coastal areas of the Tohoku region. To form safe coastal areas, countermeasures against disaster should be developed considering not only tangible infrastructures including breakwater and bridges but also intangible measures including education on disaster prevention and the development of hazard maps. The tsunami run-up analysis is expected to play a role as one of the countermeasures against tsunami. In this research, we aim to establish a tool to effectively analyze the tsunami run-up in urban areas based on the Smoothed particle hydrodynamics (SPH) method. And then, we propose a series of pre-process procedures to develop a detailed geography analysis model that reflects the geography, elevation, and exterior shapes of buildings by referring to 3D location information and digital elevation model data obtained from a geographical information system. Finally, we established a photorealistic visualization method so that citizen can understand the tsunami phenomenon intuitively.

DOI： 10.1142/S1793431116400200

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：Japan Society of Civil Engineers  

 On March 11, the huge tsunami caused by the great east Japan earthquake devastated the Pacific coastal area of north-eastern Japan. After the earthquake, the disaster prevention and mitigation against Tsunami and earthquake is being reconsidered both in the ‘hard’ method like protective infrastructure constructions and in the ‘soft’ method including disaster evacuation education of policy maker and citizens. Accurate Tsunami simulation may become a useful tool for establishing a new Tsunami prevention guideline. In this study, we have developed a new 3D tsunami inundation simulation tool by the SPH method, which is one of meshless particle analysis. In our developed tool, geography including the outline of each building is modeled from data of the Geographic Information System in a high spatial resolution with high accuracy. In addition to the newly developed preprocessing tool, a new post-processing ‘photo realistic visualization’ of the particle simulation result is proposed in order to utilize the numerical simulation for the tsunami disaster evacuation education and the other ‘soft’ disaster prevention.

DOI： 10.2208/jscejseee.72.I_367

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：WILEY-BLACKWELL  

© 2015 Wiley Periodicals, Inc. In image analysis, it is important to detect lines (straight lines) that represent the edges of an object in the image. The most popular technique for line detection is the Hough transform. In this transform, peaks resulting in the accumulator array that are obtained through a voting procedure in the parameter space represent strong evidence that a corresponding line exists in the image. In the voting procedure, large numbers of votes that are far from the peaks are unnecessary and reduce the speed of the transform. In this paper, we propose a method to speed up this process by introducing a procedure in image space that removes lines except for limited directions. This procedure makes it possible to reduce the voting range and to remove unnecessary votes. Experimental results confirm that the proposed method performs effectively.

DOI： 10.1002/ecj.11677

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Language：Japanese   Publisher：The Japan Society of Mechanical Engineers  

DOI： 10.1299/jsmecmd.2015.28._274-1_

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Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：IEEE  

© 2014 SICE. We consider estimation of an inverse model for the uncertain systems. Multi-layered neural network (NN) can approximate any continuous nonlinear mapping, then we use NN in order to represent the inverse model. The the back-propagation rule, which is commonly used for updating the weights, requires the sensitivity function of the system. However, we can not calculate this function because of uncertainty of the systems. Hence, we apply particle swarm optimization (PSO) to update the weights. PSO is suitable for learning NN, because it dose not require the derivative of the objective function. This paper introduces a novel parameter automation strategy in order to overcome the premature convergence. The acceleration coefficients are adaptively varies with the distance between the particle and the gbest which is the best solution ever found by the swarm. We can maintain the diversity of the swarm and search a better solution around the gbest efficiently. We compare the proposed method with the basic PSO and TVAC PSO, which is proposed by Ratnaweera, through the simulation of the inverse kinematics problem. The proposed method can obtain the accurate inverse model than the basic PSO and TVAC PSO.

DOI： 10.1109/SICE.2014.6935194

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Language：Japanese   Publisher：公益社団法人 土木学会  

The tsunami caused by the great east Japan earthquake lead to collapse infrastructures including bridge and breakwater. It is important to reconsider disaster prevention and mitigation techniques towards next millennium tsunami. Currently, most of local governments in Japan are promoting the selection and specification of tsunami refuge buildings for people who live in the difficult area to evacuate within the limited time. However it's difficult to settle the design code of tsunami refuge building because there are so many incertitude accident during tsunami related to water induced impact force, buoyancy force, tumble of the building and so on. Numerical simulation by a particle method has been conducted for the evaluation of tsunami fluid force acting on tsunami refuge building as a first step. Finally, efficiency and adequacy of numerical simulation in the design of tsunami fluid force has been discussed by comparing with the current design code in Japan.

DOI： 10.2208/jscejam.70.I_649

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Language：Japanese   Publisher：公益社団法人 土木学会  

A couple of years have passed since the Great East Japan Earthquake Tsunami, new Tsunami disaster prevention and mitigation methods of bridges are actively discussing toward the next millennium Tsunami. A numerical simulation can be useful way for predicting the damage of bridges, because real size experimental tests are almost impossible and too costly. In this study, particle method, which is widely applied not only for fluid dynamics and but also for solid mechanics, is utilized for fluid-rigid body interaction simulation. Mainly velocity based and force based formulations have been proposed for the fluid-rigid body treatment in the framework of particle methods. After a modified technique in the force based formulation related to the boundary condition is proposed in this paper, the difference of these two formulations has been discussing through a simple bridge wash out simulation.

DOI： 10.2208/jscejam.70.I_329

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Publishing type：Research paper (international conference proceedings)  

This paper investigates the use of particle swarm optimization (PSO) with repeating splits and merges at predetermined intervals. After a split, there is no exchange of information between the particles, which belong to different swarms. Hence, even though one particle may be trapped in a local minimum, the others are not affected. If the other particles find a better solution, the trapped particle can escape the local minimum when the particles are merged. In order to verify the efficacy of the proposed method, we applied it to the learning of a neural network for solving the inverse kinematics problem of a manipulator with uncertain parameters. The back-propagation rule requires the Jacobian of the forward kinematics, but this cannot be calculated due to uncertainties. Because PSO does not require the derivative of the objective function, it is suitable for this problem. A simulation result shows that the proposed method can obtain more accurate inverse kinematics than either global best (gbest) PSO or local best (lbest) PSO. © 2013 Springer-Verlag.

DOI： 10.1007/978-3-642-38658-9_10

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DOI： 10.2208/jscejseee.69.I_622

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Publishing type：Research paper (scientific journal)  

In image analysis, it is important to detect lines (straight lines) which represent edges of an object in the image. The most popular technique to detect lines is Hough Transform. In the transform, resulting peaks in the accumulator array which are gotten by a voting procedure in the parameter space represent strong evidence that a corresponding line exists in the image. In the voting procedure, a large number of votes which are far from the peaks are unnecessary and it makes the transform slow. In this paper, we propose a speed-up method by introducing a procedure in image space which removes lines except for the limited directional lines. Owing to the procedure, we can reduce voting range and remove the unnecessary vote. From the experimental results, we confirm that the proposed method has good performance. © 2013 The Institute of Electrical Engineers of Japan.

DOI： 10.1541/ieejeiss.133.1539

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Publishing type：Research paper (international conference proceedings)  

We propose a realtime and direct-touch interaction system for 3D cultural artifact exhibition based on a texture-based haptic rendering technique. In the field of digital archive, it is important to archive and exhibit the cultural artifact at the high-definition. To archive the shape, color and texture of the cultural artifact, it is important to archive and represent not only visual effect but haptic impression. Therefore, multimodal digital archiving, realtime multisensory rendering, and intuitive and immersive exhibition system are necessary. Therefore, we develop a realtime and direct-touch interaction system for the 3D cultural artifact exhibition based on a texture-based haptic rendering technique. In our system, the viewer can directly touch a stereoscopic vision of 3D digital archived cultural artifact with the string-based and scalable haptic interface device "SPIDAR" and vibration motor. © 2011 Springer-Verlag.

DOI： 10.1007/978-3-642-22024-1_22

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Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：SPRINGER-VERLAG BERLIN  

We propose a texture-based direct-touch interaction system for 3D woven cultural property exhibition of the "Tenmizuhiki" tapestries "Hirashaji Houou Monyou Shishu" of "Fune-hoko" of "Gion Festival in Kyoto". In the field of digital archive, it is important to archive and represent the cultural property at the high-definition. To archive the shape, color and texture of the cultural property, it is important to archive and represent not only visual effect but haptic impression. Recently, in the field of haptics, various haptic rendering devices have been developed, and various haptic rendering techniques to touch the virtual object have been proposed. In haptic rendering for the high-definition virtual object, it is difficult to render the haptic impression smoothly and calculate the reaction force at realtime. Therefore, it is require the realtime and high-definition haptic rendering techniques. In our previous work, we proposed a texture-based haptic modeling and rendering techniques at realtime and with high-definition. However, our techniques are not based on the measurement. Moreover, in the field of digital archive, it is necessary to represent the digital archived cultural property intuitively and interactively. Therefore, we applied our texture-based haptic modeling and rendering techniques for the digital archive, and we developed a realtime and direct-touch interaction system for 3D cultural property exhibition. © 2011 Springer-Verlag Berlin Heidelberg.

DOI： 10.1007/978-3-642-22819-3_33

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Publishing type：Research paper (international conference proceedings)  

We propose a realtime and direct-touch interaction system for 3D woven cultural artifact exhibition. Our system enables to exhibit the cultural artifact at high-definition and enables realtime and direct-touch interaction based on our texture-based haptic modeling and rendering techniques. In our techniques, the reaction force is changed according to the pixel value of the 2D texture images of the 3D model surface on the screen.

DOI： 10.1145/1900354.1900419

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Language：Japanese   Publisher：特定非営利活動法人 日本バーチャルリアリティ学会  

Lately, a large-scale 3D space such as the online games and virtual city has been constructed as the improvement of the computer performance and network environment. Similarly, haptic devices of 6DOF which can be used to interface with objects in a 3D space intuitively have been developed. Operating a pointer in a 3D space with 6DOF haptic devices brings various advantages like an increasement of a real feeling or an intuitive operation by the sensing the force feedback. However, the technique to operate a pointer in a large-scale 3D space such as virtual city with 6DOF haptic devices has hardly been proposed. In this research, we proposed "Dual Shell Method" which can be used to operate a pointer intuitively in a large-scale VR space by automatically switching the state of the clutch. Results from a preliminary experiment suggest that our proposed method facilitates operation in a 3D space.

DOI： 10.18974/tvrsj.14.2_193

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Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：SPRINGER-VERLAG BERLIN  

We attempted to produce an environment for education. Subjects such as mathematics or sciences are usually studied on a desk in a classroom. Our research goal is to allow students to study scientific contents more viscerally than existing studying methods by haptic interaction. To construct the environment, we have to make a user-friendly haptic interface. The study is described in two parts. The first part is defining what a useful haptic interface is. In this part, we focused on the grip of a haptic interface. SPIDAR-G is a haptic interface, which is manipulated by a grip with 8 strings.. Grip size is an important parameter for usability. We have found an optimal sphere size through SPIDAR-G usability testing. The other part is defining how teachers can use the interactive system with haptic interaction as a teaching aid. In this part , we focused on the interaction between two water molecules. First, we constructed an environment to feel Van der Waals force as well as electrostatic force with haptic interaction. Then, we observe the effectiveness of the environment when used by a class of students. © 2008 Springer-Verlag Berlin Heidelberg.

DOI： 10.1007/978-3-540-69744-2_3

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Publishing type：Research paper (international conference proceedings)  

In the field of 3D user interface devices, there is often a mismatch in VR space and device space. Rate control is one method of solving this problem, which works by translating device position into velocity of a pointer in the VR world. However, rate control is less intuitive to use than position control. One method for using position control is by introducing a manual clutching mechanism to address the mismatch between VR space and device space. In this paper, we introduce an automatic clutching method named the• •Dual Shell Method • •This system changes clutch state according to grip position of an interface device. First, grip position in device space and the pointer in VR space are connected. In this state, the clutch is ON. When the user moves the grip outside of the device space, the clutch state turns OFF automatically. Then the grip and pointer are no longer connected. To turn the clutch state ON, the user is required move the grip to the center of the device space. The • •Dual Shell Method • •is more natural than manual clutching, because clutch state can be changed automatically, so user do not have to keep their attention on the device space. Results of the experiments conducted to assess the effectiveness of this system are presented.

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Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：WORLD ACAD SCI, ENG & TECH-WASET  

This paper describes a proposed support system which enables applications designers to effectively create VR applications using multiple haptic APIs. When the VR designers create applications, it is often difficult to handle and understand many parameters and functions that have to be set in the application program using documentation manuals only. This complication may disrupt creative imagination and result in inefficient coding. So, we proposed the support application which improved the efficiency of VR applications development and provided the interactive components of confirmation of operations with haptic sense previously.
In this paper, we describe improvements of our former proposed support application, which was applicable to multiple APIs and haptic devices, and evaluate the new application by having participants complete VR program. Results from a preliminary experiment suggest that our application facilitates creation of VR applications.

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This paper describes a support application which enables the users to create the VR application in Spatial GUI System effectively. When the VR application designers create applications, it is often difficult to handle and understand many parameters and functions, both of which have to be set in the application program, with reference only to document manuals. This complication may interrupt the creative imagination and invite the inefficient coding of the users. In this paper, we describe our support application and evaluate the application for having some subjects complete VR programs, and we show that our application will provide great help for creating VR applications. © 2005, The Institute of Image Electronics Engineers of Japan. All rights reserved.

DOI： 10.11371/iieej.34.522

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It is necessary to present the haptic sense which appeals to human sense of force in order to construct the more realistic virtual world. One of the ways to present haptic sense is use of the haptic display SPIDAR and its interface the Spatial GUI System. However, there are many parameters and functions in the Spatial GUI System and it makes difficult to create VR application with reference to document manual only. In this paper, we describe a support application which enable for users to handle the parameters and functions easily in the Spatial GUI System. Moreover, we have evaluated the validity of our application with subjects and its result showed the effectiveness of our application.

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In the field of 3D user interface devices, there is often a mismatch in VR world space and device space. Rate control is one method of solving this problem, which works by translating device position into velocity of a pointer in VR world. However, rate control is less intuitive to use than position control. One method for using position control is by introducing a clutching mechanism to address the mismatch between VR. and device space. In this paper, we introduce an automatic clutching method, named "Dual Shell Method," which is easier and more intuitive to use than manual clutching methods.

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In the digital archive field, it is important to archive the cultural artifact at the high-definition and to reconstruct the digital archived high-definition cultural artifact with multisensory information at realtime. However, it is difficult to reconstruct the cultural artifact at real time and with high-definition. Moreover, it is difficult to process the high-definition measured model at high speed on the computer. Moreover, to exhibit the cultural artifact more intuitively, a direct-touchable exhibition interface is necessary. Therefore, we developed a realtime and direct-touchable exhibition system for the high-definition cultural artifact.

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It is necessary to present the haptic sense which appeals to human sense of force in order to construct the more realistic virtual world. One of the ways to present haptic sense is use of the haptic display SPIDAR and its interface the Spatial GUI System. However, there are many parameters and functions in the Spatial GUI System and it makes difficult to create VR application with reference to document manual only. In this paper, we describe a support application which enable for users to handle the parameters and functions easily in the Spatial GUI System. Moreover, we have evaluated the validity of our application with subjects and its result showed the effectiveness of our application.

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In image analysis, it is important to detect the lines which represent the edges of the objects in the image. The most popular technique to detect the lines is Hough Transform. In the transform, resulting peaks in the accumulator array which are gotten by a voting procedure in the parameter space represent strong evidence that a corresponding line exists in the image. In the voting procedure, a large number of votes which are far from the peaks are unnecessary and it makes the transform slow. In this article, we propose a speed-up method by introducing a procedure (using a inter-frame operation) in image space which removes lines except for limited directional lines. Owing to the procedure, we can reduce voting range and remove the unnecessary vote. From the experimental results, we confirm that the proposed method has good performance.

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Recently, it became possible to easily produce interactive contents by the help of development environments, such as Flash. Produced contents utilize audio-visual effects in an efficient way. Haptic devices, on the other hand, enabled production of interactive contents by adding the sense of touch into them. Considering the benefits of both approaches, we developed a highly interactive language learning system by combining Flash with a haptic device, called SPIDAR. The system is called as INSTILL and evaluated on a learning-experiment. Experiment results suggested that combination of Flash and SPIDAR made a major contribution to the subject concentration.

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A virtual coupling is a conventional method to link a haptic device and a virtual object in VR environment. Because the virtual coupling method is designed mainly for stability, it may have low fidelity. Therefore, the application developer had to select the coefficient of coupling of each application by the trial-and-error method. In this paper, we describe a method by which the coefficient can be automatically selected by using machine learning.

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In image analysis, it is important to detect the lines which represent the edges of the objects in the image. The most popular technique to detect the lines is Hough Transform. In the transform, resulting peaks in the accumulator array which are gotten by a voting procedure in the parameter space represent strong evidence that a corresponding line exists in the image. In the voting procedure, a large number of votes which are far from the peaks are unnecessary and it makes the transform slow. In this article, we propose a speed-up method by introducing a procedure (using a inter-image operation) in image space which removes lines except for limited directional lines. Owing to the procedure, we can reduce voting range and remove the unnecessary vote. From the experimental results, we confirm that the proposed method has good performance.

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Recently, the research on the digital museum is drawing attention. In the field of digital archive, it is important to archive and exhibit the cultural artifact at high definition. To archive the shape, color and texture of the cultural artifact, it is important to archive and represent not only visual effect but haptic impression. Moreover, to exhibit the digital archived 3D cultural artifact naturally, a realtime and direct exhibition system by the multimodal information is necessary. We have worked on a digital archive of the Gion Festival in Kyoto, focusing on the culture of Kyoto. After the 2011 Gion Festival, the repair work of the Fune-hoko storage was scheduled. Therefore, we created a scanning system for the 3D woven cultural artifacts with the laser range scanner, and attempted the 3D measurement and modeling of the 3D woven cultural artifact of the Fune-hoko at high definition. In this paper, we describe a 3D measurement, modeling, and a realtime and direct VR exhibition system of the 3D woven cultural artifact.

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This paper describes design and implementation of new Grip with Click and Clutch mechanism. This grip is excellent in particular in rotating operation and has the high operability compared with current methods. Operability evaluation experiments showed that proposition method completes tasks in time shorter than current methods.

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Language：Japanese   Presentation type：Oral presentation (general)  

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This paper describes design and implementation of new grip with clutch mechanism for 3D mouse. This grip provides the users with an infinite-like device space and an intuitive clutch feeling. And this grip is excellent in particular in rotating operation and has the high operability compared with current methods. Operability evaluation experiments showed that proposition method completes tasks in time shorter than current methods.

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Recently, it became possible to easily produce interactive contents by the help of development environments, such as Flash. Produced contents utilize audio-visual effects in an efficient way. Haptic devices, on the other hand, enabled production of interactive contents by adding the sense of touch into them. Considering the benefits of both approaches, we developed a highly interactive language learning system by combining Flash with a haptic device, called SPIDAR. The system is called as INSTILL and evaluated on a learning-experiment. Experiment results suggested that combination of Flash and SPIDAR made a major contribution to the subject concentration.

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We propose a tracking method via 1D flow. This method calculates 1D flow as distribution. The characteristics of this method are avoidance of ill-posedness by 1D flow, and expansion of the traceable motion by using the multidirectional distribution. The experimental results show the possibility of tracking by distribution of 1D flow.

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