tocauthor: Onishi_K* : Human-Computer Interaction Bibliography Search

Investigating Accuracy of Tilting Operation on Wrist-worn Devices with Touchscreens Late-Breaking Works: Novel Interactions / Shima, Keigo / Onishi, Kazusa / Takada, Ryosuke / Adachi, Takuya / Shizuki, Buntarou / Tanaka, Jiro Extended Abstracts of the ACM CHI'16 Conference on Human Factors in Computing Systems 2016-05-07 v.2 p.2705-2711

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Summary: The tilting operation has been shown to be useful in expanding the input vocabulary of a small device; therefore, this operation could also be useful in expanding the input vocabulary of wrist-worn devices. In this study, in order to explore new design guidelines of GUI and operation methods for smartwatches, we have investigated the accuracy of the tilting operation for smartwatches. We conducted an experiment using a cursor whose position is determined according to the direction and angle of tilt. The result shows that the deviation in the x-axis (i.e., the inclination of the arm) direction ranges from -0.10 degrees to +0.07 degrees and from -0.10 degrees to +0.07 degrees under Seating and Standing condition, respectively; the deviation in the y-axis (i.e., the rotation of the wrist) direction from -0.12 degrees to +0.10 degrees and from -0.12 degrees to +0.09 degrees.

Virtual Liver Surgical Simulator by Using Z-Buffer for Object Deformation Universal Access to Health Applications and Services / Onishi, Katsuhiko / Noborio, Hiroshi / Koeda, Masanao / Watanabe, Kaoru / Mizushino, Kiminori / Kunii, Takahiro / Kaibori, Masaki / Matsui, Kosuke / Kon, Masanori UAHCI 2015: 9th International Conference on Universal Access in Human-Computer Interaction, Part III: Access to Learning, Health and Well-Being 2015-08-02 v.3 p.345-351

Keywords: Z-buffer; Liver surgical simulator; GPU; Object deformation

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Summary: Virtual surgical simulator which is using computer graphics is much popular system than before. It is generally used in the medical areas, such as medical hospital or medical university. The simulator uses virtual organ models like liver, brain and so on. These models are usually based on the scanning data from patients and are used as volume models. Fortunately, the volume model is familiar with its cutting or deforming operation in a surgical system. For this reason, there are many kinds of surgical simulation or navigation systems using the volume model. However, visual reality of the volume model is not sufficient for human being including doctors. This means that the doctors cannot identify shape or location of a target organ from volume objects. In order to overcome this, we should use the translating method, such as marching cubes method and so on, for getting precisely polygon models which is included normal vectors of volume object. However, the method is quite time consuming and consequently the doctors cannot operate the virtual model in real-time.
On these observations, we propose the virtual surgical simulator for operating the human liver in a virtual environment, which is based on the cooperation of polygon models and Z-buffer in GPU. By using parallel processing of GPU, the simulator allows uses to cut or deform a virtual liver model by using several kinds of medical tools like a scalpel in this system. In addition, visual reality of polygon model is wonderful for a doctor to identify its shape or location because this model maintains their precise normal vector.

Investigation of Transferring Touch Events for Controlling a Mobile Device with a Large Touchscreen Touch-Based and Haptic Interaction / Onishi, Kazusa / Shizuki, Buntarou / Tanaka, Jiro HCI International 2015: 17th International Conference on HCI, Part II: Interaction Technologies 2015-08-02 v.2 p.250-261

Keywords: Large mobile device; Touch gesture; Single-handed control

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Summary: When users hold large mobile devices equipped with a large touchscreen in one hand, the region distant from the thumb is too distant for users to control. This forces users to change their hand posture so that their thumb can reach to the top half. To address this problem, we explore a technique that transfers touch events on the bottom half of a touchscreen to its top half. This technique may allow users to control all regions of a large touchscreen by using only the bottom half. Thus, users can control a mobile device without changing hand posture. We conducted a user study to investigate the feasibility of our technique. From the results, our technique is marginally faster than direct touch and thus, might be feasible.

Study of Tile Menu Selection Technique Using the Relative Position of Joints for Gesture Operation Gesture, Gaze and Motion Detection, Modelling and Recognition / Gomi, Yamato / Onishi, Katsuhiko HCI International 2015: 17th International Conference on HCI: Posters' Extended Abstracts, Part I 2015-08-02 v.4 p.481-484

Keywords: 3D pointing; Selection method; Gesture; Two-hand manipulation

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Summary: In this paper, we describe about our selected method by using the 3D tile menu by hand gesture motion. In the discussion of our approach, it is a mainly subject to realize the efficient selection gesture by user's arm for any position on the screen. Therefore, we designed the selection method by using relative position of the user's arm joints. The method uses user's hands, elbows and shoulder position at each arm. It recognized user's selected points by the relative position of these joints. We make the prototype system which has been implemented our method. And we examined the basic evaluation of our selection method by comparing with the conventional method. As a result of this evaluation, it is confirmed that our method allows users to perform smooth selecting operation regardless of the position.

Depth Camera Calibration and Knife Tip Position Estimation for Liver Surgery Support System Gesture, Gaze and Motion Detection, Modelling and Recognition / Koeda, Masanao / Tsukushi, Akio / Noborio, Hiroshi / Onishi, Katsuhiko / Mizushino, Kiminori / Kunii, Takahiro / Watanabe, Kaoru / Kaibori, Masaki / Matsui, Kosuke / Kwon, Masanori HCI International 2015: 17th International Conference on HCI: Posters' Extended Abstracts, Part I 2015-08-02 v.4 p.496-502

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Summary: We have developed a liver surgery support system that uses two depth cameras and measures positional relationships between a surgical knife and a liver in real time. In this report, the overview of our system, the method for depth camera calibration, the estimation for knife tip positioning, and some experimental results are described.

Haptic AR Dental Simulator Using Z-buffer for Object Deformation Health and Rehabilitation Applications / Onishi, Katsuhiko / Mizushino, Kiminori / Noborio, Hiroshi / Koeda, Masanao UAHCI 2014: 8th International Conference on Universal Access in Human-Computer Interaction, Part III: Aging and Assistive Environments 2014-06-22 v.3 p.342-348

Keywords: Collision detection; dental surgical simulator; augmented reality; GPU

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Summary: Dental surgical simulator could be one of the efficient tools to learning and practicing dental surgical skills. To these simulators, the visual and tactile feedback is desirable to be processed in real time. And, in the dental operation, the hand position during operations is one of the skills to learn and practice. Therefore, we develop the dental surgical simulator which use virtual tooth surface model for processing real time rendering. And we develop a display system which allow users to training dental operation by a right hand position.. The tooth model is deformed by cutting and drilling operation using haptic device. And the display is set close to user's hand position and shows combined image with virtual tooth model as a surgical target and a real tooth model as other parts of the patient dental model. The system uses a collision detection and deformation method by using Z-buffer for virtual objects. This method enables users to view the complex shape of virtual tooth model by the surgical operation tasks and practicing dental surgical tasks. We developed prototype system and confirmed about the capability of our system.

HandyScope: A Remote Control Technique Using Circular Widget on Tabletops Gesture-Based Interaction / Kuribara, Takuro / Mita, Yusaku / Onishi, Kazusa / Shizuki, Buntarou / Tanaka, Jiro HCI International 2014: 16th International Conference on HCI, Part II: Advanced Interaction Modalities and Techniques 2014-06-22 v.2 p.69-80

Keywords: bimanual interaction; multi-touch; gesture; dynamic control-display gain; pointing; target acquisition; pull-out

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Summary: A large multi-touch tabletop has remote areas that the users might not touch by their hands. This forces users to move around the tabletop. In this paper, we present a novel remote control technique which we call HandyScope. This technique allows users to manipulate those remote areas. Moreover, users can move an object between the nearby area and the remote areas using a widget. In addition, users can precisely point a remote area quickly because this system includes our proposed control-display ratio changing system. To evaluate the performance of HandyScope, we compared HandyScope with direct touch manipulation. The results show that HandyScope is significantly faster in selection.

AR Dental Surgical Simulator Using Haptic Feedback Health and Medicine / Onishi, Katsuhiko / Mizushino, Kiminori / Ikemoto, Hiroki / Noborio, Hiroshi HCI International 2013: 15th International Conference on HCI: Posters' Extended Abstracts Part II 2013-07-21 v.7 p.202-205

Keywords: Dental surgical simulator; augmented reality; direct manipulation

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Summary: We describe about our dental surgical simulator which enable users to simulate dental surgical operation. Our simulator which enables the user to learn dental surgical methods through actual hand and body postures. The proposed system uses a display showing a virtual tooth model and real teeth and gums that are positioned close to the hands of the user, which allows the user to directly manipulate objects with haptic feedback. As a preliminary evaluation, in display system, we measured the deviation between real object image and virtual object image at user's view positions. And we confirmed the capability and the limitation of our system.

Development of AR Display System for Dental Surgical Simulator Part II / Virtual and Augmented Environments / Onishi, Katsuhiko / Ito, Shota / Kawamura, Yusuke / Noborio, Hiroshi HCI International 2011: 14th International Conference on HCI - Posters' Extended Abstracts, Part II 2011-07-09 v.6 p.130-133

Keywords: dental surgical simulator; direct manipulation; augmented reality

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Summary: In this paper, we describe about a display system for dental surgical simulator. The design concept of our system is that the system allows the user to learning the dental surgical methods with the real hand and body posture. Therefore our system set a display, which shows virtual teeth model and real teeth and gums, close to user's hand position and allows the user to manipulating object directly.

Designing space for socially meaningful creativity enhanced by new technologies Demonstrations / Miyata, Yoshiro / Ueda, Nobuyuki / Onishi, Keiko / Sowa, Tomoyuki / Harada, Yasushi / Mogi, Kazuzi / Tetsuka, Chihiro / Inoue, Masaki Proceedings of the 2009 Conference on Creativity and Cognition 2009-10-26 p.431-432

Keywords: collaborative creativity, lifelong creativity, scratch/cricket, trans-cultural learning, workshops

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Summary: We will demonstrate some workshop space that we have designed for creating and sharing socially meaningful activities that transcend differences in culture and age. We argue for the importance of: 1. Sharing at multiple levels: bodily/sensory, emotional, intellectual, and social levels. 2. Connecting these levels by introducing technologies in response to socially shared meanings. In our demonstration, we will show some activities incorporating Scratch/Cricket technologies to enhance sharing and connecting these levels.

Design of a learning place for collaborative creation by the mode of Byo-bu (Japanese folding screen) Workshops / Tetsuka, Chihiro / Mogi, Kazuzi / Miyata, Yoshiro / Ueda, Nobuyuki / Harada, Yasushi / Sowa, Tomoyuki / Onishi, Keiko / Inoue, Masaki Proceedings of the 2009 Conference on Creativity and Cognition 2009-10-26 p.489-490

Keywords: collaborative creation, collaborative learning, Japanese art, Japanese traditional culture

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Summary: This workshop aims increase understanding through experience the style of a traditional Japanese art. The idea is to develop growing "images" from the impressions gotten from the paintings on the "Byo-bu (Folding screen)", and then to re-create with the others a "New story" coming from these "images". Thus, we would like to think about a collaborative creation based on individual or common ideas and the process of creative thinking that were raised by Byo-bu.

AirFlip-Undo: Quick Undo using a Double Crossing In-Air Gesture in Hover Zone Posters / Shima, Keigo / Takada, Ryosuke / Onishi, Kazusa / Adachi, Takuya / Shizuki, Buntarou / Tanaka, Jiro Adjunct Proceedings of the 2015 ACM Symposium on User Interface Software and Technology 2005-11-08 v.2 p.97-98

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Summary: In this work, we use AirFlip to undo text input on mobile touchscreen devices. AirFlip involves a quick double crossing in-air gesture in the boundary surfaces of hover zone of devices that have hover sensing capability. To evaluate the effectiveness of undoing text input with AirFlip, we implemented two QWERTY soft keyboards (AirFlip keyboard and Typical keyboard). With these keyboards, we conducted a user study to investigate the users' workload and to collect subjective opinions. The results show that there is no significant difference in workload between keyboards.

Interactive modeling of trees by using growth simulation Interaction techniques / Onishi, Katsuhiko / Hasuike, Shoichi / Kitamura, Yoshifumi / Kishino, Fumio Proceedings of the 2003 ACM Symposium on Virtual Reality Software and Technology 2003-10-01 p.66-72

Keywords: L-system, data structure, intuitive interaction, multimodal interface, tree models, virtual reality

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Summary: We propose a real-time interactive system that enables users to generate, manipulate and edit the shape model of a tree based on growth simulation by directly indicating its global and spatial information. For this purpose, three-dimensional (3D) spatial information is introduced to the well-known L-system as an attribute of the growth simulation. Moreover, we propose an efficient data structure of L-strings in order to speed up the process.