Papers - Isogawa, Mariko

Content completion by restoring in narrow feature space and compensating lost features

M Isogawa, D Mikami, K Takahashi, A Kojima

IEICE Technical Report; IEICE Tech. Rep. 115 (76), 37-42  2015

Virtual Omnidirectional Video Synthesis with Multiple Cameras for Sports Training.

M Isogawa, D Mikami, K Takahashi, A Kojima

icSPORTS, 271-275 (SciTePress)     271 - 275 2015

• Access to Document (DOI)

Toward Enhancing Robustness of DSystem: Ranking Model for Background Inpainting.

Mariko Isogawa, Dan Mikami, Kosuke Takahashi, Akira Kojima

2015 IEEE International Symposium on Mixed and Augmented Reality(ISMAR) (IEEE Computer Society)     178 - 179 2015

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Ranking model for image inpainting

M Isogawa, D Mikami, K Takahashi, A Kojima

IEICE Technical Report; IEICE Tech. Rep. 115 (245), 49-54 115 ( 245(MVE2015 21-36) )  2015

ISSN  0913-5685

Immersive Previous Experience in VR for Sports Performance Enhancement

D Mikami, M Isogawa, K Takahashi, H Takada, A Kojima

Proc. of 3rd International Congress on Sport Sciences Research and …  2015

Extrinsic Camera Calibration of Display-Camera System using Cornea Reflection

K Takahashi, D Mikami, M Isogawa, A Kojima

IEICE Technical Report; IEICE Tech. Rep. 115 (245), 61-66  2015

Content Completion in Lower Dimensional Feature Space through Feature Reduction and Compensation.

Mariko Isogawa, Dan Mikami, Kosuke Takahashi, Akira Kojima

2015 IEEE International Symposium on Mixed and Augmented Reality(ISMAR) (IEEE Computer Society)     156 - 159 2015

• Access to Document (DOI)

Making graphical information visible in real shadows on interactive tabletops

M Isogawa, D Iwai, K Sato

IEEE Transactions on Visualization and Computer Graphics 20 (9), 1293-1302 20 ( 9 ) 1293 - 1302 2014

Research paper (scientific journal), Lead author

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We introduce a shadow-based interface for interactive tabletops. The proposed interface allows a user to browse graphical information by casting the shadow of his/her body, such as a hand, on a tabletop surface. Central to our technique is a new optical design that utilizes polarization in addition to the additive nature of light so that the desired graphical information is displayed only in a shadow area on a tabletop surface. In other words, our technique conceals the graphical information on surfaces other than the shadow area, such as the surface of the occluder and non-shadow areas on the tabletop surface. We combine the proposed shadow-based interface with a multi-touch detection technique to realize a novel interaction technique for interactive tabletops. We implemented a prototype system and conducted proof-of-concept experiments along with a quantitative evaluation to assess the feasibility of the proposed optical design. Finally, we showed implemented application systems of the proposed shadow-based interface.

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影のメタファを利用したポインティングインタフェースにおける影の制約緩和による操作性の向上 (< 特集> 複合現実感 6)

武内真梨奈， 五十川麻理子， 岩井大輔， 佐藤宏介

日本バーチャルリアリティ学会論文誌 19 (2), 207-214  2014

Research paper (scientific journal)

特徴量の削減と合成に基づく体感品質に優れた画像修復

五十川麻理子， 三上弾， 小島明

電子情報通信学会技術研究報告; 信学技報 114 (239), 37-42 114 ( 239(MVE2014 32-48) )  2014

ISSN  0913-5685

Improvement of Operability by Loosing Spatial Relationship with Real Shadow on the Pointing Interface which Uses a Shadow Metaphor

M TAKEUCHI, M ISOGAWA, D IWAI, K SATO

日本バーチャルリアリティ学会論文誌 19 (2), 207-214 19 ( 2 )  2014

ISSN  1344-011X

体感品質の良い多視点映像提示手法

三上弾

電子情報通信学会技術研究報告= IEICE technical report: 信学技報 114 (114), 7-12 114 ( 114(MVE2014 13-31) )  2014

ISSN  0913-5685

Weak perspective shadow interface for seated user's pointing on large wall display

M Takeuchi, M Isogawa, D Iwai, K Sato

2014 IEEE/SICE International Symposium on System Integration, 316-321 (IEEE)     316 - 321 2014

Accepted

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Shadow is widely researched as a user interface for manipulating graphical information on large displays. The shadow of one's fingertip is used as a pointing cursor whose position and size (i.e., gain and reaching area) can be intuitively adjusted, because one thoroughly comprehend the shadow's perspective projection behavior. The goal of this research is to allow a seated user, who cannot sufficiently move his/her fingertip, to manipulate the shadow cursor. We achieve this by relaxing the perspective constraints, i.e., applying weak perspective projection model. Through an experiment, we confirmed that the pointing performance of seated users is improved in the proposed method compared with the conventional method. Specifically, the users completed pointing tasks 25.1 % faster with 54.2 % fewer errors when the target size was small, 34.5 % faster with 64.2 % fewer errors when the target size was medium, and with 58.3 % fewer errors when the target size was large.

Optically hiding of tabletop information with polarized complementary image projection - Your shadow reveals it!

Mariko Miki, Daisuke Iwai, Kosuke Sato

Proceedings of the ACM International Conference on Interactive Tabletops and Surfaces, ITS'11    260 - 261 2011

Accepted

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We propose the concept and implementation of a graphical information hiding technique for interactive tabletops where users can view the information by simply casting real shadows. We placed three projectors (one in the rear and two in the front) in such a way that the rear one projects graphical information onto a tabletop surface, and the front ones project a complementary image, so that the combined image displayed on the surface becomes uniformly gray, thus hiding the information from the viewer. Users can view the hidden information by blocking the light from the front projector, revealing the complementary image that is being projected onto the occluder. We use the other front projector and polarization filters to make the complementary image projected onto the occluder also uniformly gray. Because the technique completely relies on optical phenomena, users can interact with the system without suffering from any false recognitions or delays. © 2011 ACM.

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