著者

伊東 健一 伴 祐樹 割澤 伸一

出版者

特定非営利活動法人 日本バーチャルリアリティ学会

雑誌

日本バーチャルリアリティ学会論文誌 (ISSN:1344011X)

巻号頁・発行日

vol.26, no.4, pp.277-287, 2021-12-24 (Released:2021-12-24)

参考文献数

28

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Wind displays are devices that enhance the presence of virtual reality (VR) by simulating realistic sensation of wind. However, certain wind displays require many wind sources because they reproduce fully physical wind directions. Methods to manipulate perceived directions of wind by cross-modal effects and realize wind displays with fewer wind sources have been proposed so far. We hypothesized that the visuoaudio-haptic cross-modal effect can enhance the effect of the manipulation. Thus we quantitatively investigated the effect of the congruent visual and audio information on the perceived wind directions. We present virtual images of flowing particles and threedimensional sounds of the wind as information to indicate “virtual” wind directions. The user study has shown that presenting both visual and audio information is significantly effective than presenting the audio or visual information alone. The median of absolute errors between the perceived wind directions and the virtual wind directions were 34.8° at most with the visual and audio information and the physical wind from front or behind.

著者

鳴海 拓志 伴 祐樹 梶波 崇 谷川 智洋 廣瀬 通孝

雑誌

情報処理学会論文誌 (ISSN:18827764)

巻号頁・発行日

vol.54, no.4, pp.1422-1432, 2013-04-15

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本研究では,拡張現実感を利用することで満腹感の手がかりとなる要因を操作し,同量の食事から得られる満腹感を操作する「拡張満腹感」システムを提案する.近年の心理学や行動経済学等の研究の進展により,食事から得られる満腹感は,食事そのものの量だけでなく,照明環境や環境音,盛りつけや見た目の量,一緒に食べる人数等,食事の際の周辺の状況に暗黙のうちに大きく影響を受けることが明らかになってきている.こうした知見に基づき,食事そのものを変更するのではなく,満腹感に寄与する要素に対する知覚を変化させることで,満腹感と食事摂取量の非明示的な操作が可能になると考えた.そこで,満腹感に影響を与える要素の1つである食品の見た目の量に着目し,リアルタイムに視覚的な食事ボリュームを変化させてフィードバックする拡張満腹感システムを構築した.このシステムでは,デフォーメーションアルゴリズムであるrigid MLS methodを利用して食品を握る手を適切に変形することで,手のサイズは一定のまま,対象となる食品のみを拡大・縮小することができる.実験により提案システムがユーザの食品摂取量に影響を与えるかを評価したところ,得られる満腹感は一定のまま食品摂取量を増減両方向に約10%程度変化させる効果があるという結果が得られ,提案システムが無意識的に満腹感を操作し,食品摂取量を変化させる効果があることが示唆された.

著者

松本 啓吾 鳴海 拓志 伴 祐樹 谷川 智洋 廣瀬 通孝

出版者

特定非営利活動法人 日本バーチャルリアリティ学会

雑誌

日本バーチャルリアリティ学会論文誌 (ISSN:1344011X)

巻号頁・発行日

vol.23, no.3, pp.129-138, 2018 (Released:2018-09-30)

参考文献数

20

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This paper describes a novel method to effectively manipulate spatial perception by utilizing the effect of visuo-haptic interaction by presenting haptic cues according to the image presented to the vision via a head-mounted display. We evaluated the method of combining haptic cues with curvature manipulation that makes us feel straight ahead in a virtual environment despite actually walking on a circular arc path. Our results show that the users walked along the target walking path more under and felt they were walking straight under the condition with the haptic cues compared with the condition without the haptic cues.

著者

鳴海 拓志 伴 祐樹 藤井 達也 櫻井 翔 井村 純 谷川 智洋 廣瀬 通孝

出版者

特定非営利活動法人 日本バーチャルリアリティ学会

雑誌

日本バーチャルリアリティ学会論文誌 (ISSN:1344011X)

巻号頁・発行日

vol.17, no.4, pp.333-342, 2012

被引用文献数

1

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This paper proposes a method for reducing fatigue during handling medium-weight objects and augmenting our endurance by affecting our weight perception with augmented reality technology. Psychological studies revealed our weight perception during handling objects is affected by their visual property. We hypothesized that this illusionary effect in weight perception can be applied to reduce fatigue during handling medium-weight objects without mechatronics-based physical assistance which requires complex structures and various costs. We propose an augmented reality system which changes the brightness value of an object in order to reduce weariness during handling it. We conducted two fundamental experiments to investigate the effectiveness of the proposed system. Subjective and quantitative evaluation suggested that our system reduces fatigue during the handling task and improves energy efficiency by cutting away excess energy.

著者

伊東 健一 伴 祐樹 割澤 伸一

出版者

バーチャル学会運営委員会

雑誌

バーチャル学会発表概要集 バーチャル学会2020 (ISSN:27583791)

巻号頁・発行日

pp.14, 2020-11-30 (Released:2023-06-26)

著者

伴 祐樹 櫻井 翔 鳴海 拓志 谷川 智洋 廣瀬 通孝

出版者

特定非営利活動法人 日本バーチャルリアリティ学会

雑誌

日本バーチャルリアリティ学会論文誌 (ISSN:1344011X)

巻号頁・発行日

vol.21, no.1, pp.109-120, 2016-03-31 (Released:2017-02-01)

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The main contribution of this paper is establishing the method to enhance work efficiency unconsciously by controlling the time rate that a virtual clock shows. Recently, it has been revealed that work efficiency is influenced by various environmental factors such as work environment's atmosphere, temperature and so on. On the contrary, it has become clear that the work rate is affected by a time sensation. While working, the more amount of information we process in a limited time, the longer elapsed time we perceive. Besides, the higher cognitive load we get from difficult works, the longer elapsed time we perceive. In this way, a perception of time rate and a cognitive load of works affect each other. In this study, we focus on a "clock" as a tool, which gives the recognition of time rate and length for everyone mutually. We propose a method to improve a person's work efficiency, especially work rate unconsciously by giving an illusion of false sense of the passaged time by a virtual clock that displays the time rate that differ from real one visually. We conducted experiments to investigate the influence of the changes in the displayed virtual time rate on time perception and work efficiency. Besides, to evaluate an effect of an implication of a "clock", we conducted the counter experiments with a flicker stimulus and a reversely rotated virtual clock. The experimental results showed that by displaying the accelerated time rate, it is possible to improve work efficiency with constant time perception, and a "clock" is critical for enhancing work rate.

著者

鳴海 拓志 伴 祐樹 谷川 智洋 廣瀬 通孝

出版者

一般社団法人電子情報通信学会

雑誌

電子情報通信学会技術研究報告. MVE, マルチメディア・仮想環境基礎 (ISSN:21859329)

巻号頁・発行日

vol.111, no.235, pp.63-68, 2011-10-06

参考文献数

22

被引用文献数

1

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食事をとる量は,食事そのものだけでなく,食事の際の周辺の状況に左右されることが近年明らかになってきている.本研究では,拡張現実感技術を用いることで,視覚情報から得られる食事ボリュームを操作し,同量の食事から得られる満腹感を操作することを目指している.本稿では,視覚的な食事ボリュームの変化が満腹感に与える影響についての基礎的調査ならびにそのような「拡張満腹感」システムの実現に向けて構築した,リアルタイムに視覚的な食事ボリュームを変化させてフィードバックする画像処理技術について報告する.

著者

国分 新 伴 祐樹 鳴海 拓志 谷川 智洋 廣瀬 通孝

出版者

特定非営利活動法人 日本バーチャルリアリティ学会

雑誌

日本バーチャルリアリティ学会論文誌 (ISSN:1344011X)

巻号頁・発行日

vol.19, no.4, pp.571-580, 2014-12-31 (Released:2017-02-01)

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Input with a touch panel interface of a small device is typically inaccurate because the touch point is occulded by te user's finger and a user cannot obtain haptic feedback. To overcome this problem, we propose a visuo-haptic system with a rear touch interface to evoke the haptic sensation without using haptic devices. For normal force, the system modifies the shape of a virtual object when the user presses the device from behind. For shearing force, the system produces a mismatch between the speed of the touch point on the rear side, which is hidden by the monitor, and a pointer, which shows a touch point displayed on the monitor. Using the system, we coducted experiments to explore the effect of visuo-haptic interaction of normal and shearing forces with a rear touch interface.The results demonstrated that more than 80% of participants perceived greater stiffness with the deformed model than the model not deformed by normal force. For shearing force, the results showed significant differences in perception based on differing strengths of visual feedback. In addition, the results showed that subtle change of the haptic sensation can be evoked with the visual feedback of deformed hand in place of a cursor.

著者

宇治土公 雄介 鳴海 拓志 伴 祐樹 谷川 智洋 広田 光一 廣瀬 通孝

出版者

特定非営利活動法人 日本バーチャルリアリティ学会

雑誌

日本バーチャルリアリティ学会論文誌 (ISSN:1344011X)

巻号頁・発行日

vol.22, no.3, pp.305-313, 2017 (Released:2017-09-30)

参考文献数

24

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We proposes a novel method that renders haptic perceptions only using a touch screen based on visuo-haptic interaction. Our proposed method evokes a feeling of resistive force by making a discrepancy between the movement of the finger swiping the screen and the background image which moves according to the finger movement. First experiment shows that the proposed method can evoke perception of resistance according to the constant ratio between the displacement of the finger and background image. That is to say, the user perceives strong resistance to move when the background image moves slower than the finger. Moreover, same experiment also suggested that the evoked haptic perception becomes stronger when the method is applied to frequently repeated movements. Second Experiment shows that visibility of the finger on touch screen is important factor for proposed method.

著者

櫻井 翔 伴 祐樹 鳴海 拓志

出版者

日本バーチャルリアリティ学会

雑誌

日本バーチャルリアリティ学会大会論文集 (ISSN:13495062)

巻号頁・発行日

vol.17, pp.363-366, 2012-09-12

被引用文献数

1