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Aurélie Cohé


Publications by Aurélie Cohé (bibliography)

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Cohé, Aurélie and Hachet, Martin (2012): Understanding user gestures for manipulating 3D objects from touchscreen inputs. In: Proceedings of the 2012 Conference on Graphics Interface 2012. pp. 157-164. http://dl.acm.org/citation.cfm?id=2305303

Multi-touch interfaces have emerged with the widespread use of smartphones. Although a lot of people interact with 2D applications through touchscreens, interaction with 3D applications remains little explored. Most of 3D object manipulation techniques have been created by designers and users are generally put aside from the design creation process. We conducted a user study to better understand how non-technical users interact with a 3D object from touchscreen inputs. The experiment has been conducted while users manipulated a 3D cube with three points of view for rotations, scaling and translations (RST). Sixteen users participated and 432 gestures were analyzed. To classify data, we introduce a taxonomy for 3D manipulation gestures with touchscreens. Then, we identify a set of strategies employed by users to realize the proposed cube transformations. Our findings suggest that each participant uses several strategies with a predominant one. Finally, we propose some guidelines to help designers in the creation of more user friendly tools.

© All rights reserved Cohé and Hachet and/or their publisher

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Cohé, Aurélie, Decle, Fabrice and Hachet, Martin (2011): tBox: a 3d transformation widget designed for touch-screens. In: Proceedings of ACM CHI 2011 Conference on Human Factors in Computing Systems 2011. pp. 3005-3008. http://dx.doi.org/10.1145/1978942.1979387

3D transformation widgets are commonly used in many 3D applications operated from mice and keyboards. These user interfaces allow independent control of translations, rotations, and scaling for manipulation of 3D objects. In this paper, we study how these widgets can be adapted to the tactile paradigm. We have explored an approach where users apply rotations by means of physically plausible gestures, and we have extended successful 2D tactile principles to the context of 3D interaction. These investigations led to the design of a new 3D transformation widget, tBox, that can been operated easily and efficiently from gestures on touch-screens.

© All rights reserved Cohé et al. and/or their publisher

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Hachet, Martin, Bossavit, Benoit, Cohé, Aurélie and Rivière, Jean-Baptiste de la (2011): Toucheo: multitouch and stereo combined in a seamless workspace. In: Proceedings of the 2011 ACM Symposium on User Interface Software and Technology 2011. pp. 587-592. http://dx.doi.org/10.1145/2047196.2047273

We propose a new system that efficiently combines direct multitouch interaction with co-located 3D stereoscopic visualization. In our approach, users benefit from well-known 2D metaphors and widgets displayed on a monoscopic touchscreen, while visualizing occlusion-free 3D objects floating above the surface at an optically correct distance. Technically, a horizontal semi-transparent mirror is used to reflect 3D images produced by a stereoscopic screen, while the user's hand as well as a multitouch screen located below this mirror remain visible. By registering the 3D virtual space and the physical space, we produce a rich and unified workspace where users benefit simultaneously from the advantages of both direct and indirect interaction, and from 2D and 3D visualizations. A pilot usability study shows that this combination of technology provides a good user experience.

© All rights reserved Hachet et al. and/or ACM Press

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