Visualization and Interactions

Permanent staff

• 2 Professors: Dominique Bechmann and Jean-Michel Dischler
• 3 Assistant professors: Antonio Capobianco, Caroline Essert, Jérôme Grosjean
• 1 Research engineers: Olivier Génevaux

Others participants

• 1 Associate researcher : Murielle TORREGROSSA (MC IUT RS, -12/2012)
• 7 Post-doctoral: Vincent BAUDET (CNRS, 11/2006-10/2007), Arnaud FABRE (ATER, 12/2006-08/2007), Guillaume GILET (ANR ATROCO, 10/2009-08/2010), Amel GUETAT (ATER, 09/2007-08/2009), Jérôme SIMONIN (ANR DNA, 07/2009-06/2010), Ludovic STERNBERGER (ATER, 12/2006-08/2007), Manuel VEIT (ATER, 10/2010-08/2011)
• 2 PhD students : Alexandre ANCEL (Ministère, 10/2008-), Jonathan WONNER (Normalien, 10/2010-)
• 4 Former PhD students : Lucas AMMANN (Ministère, 10/2006-09/2010), Guillaume GILET (Contrat IRCAD, 01/2006-09/2009), Stéphane MARCHESIN (Ministère, 10/2003-07//2007), Manuel VEIT (Ministère, 10/2007-09/2010),

Interaction

Relying on the analysis and evaluation of theoretical models of 3D interaction, we realised an experimental analysis based on the notion of degrees of freedom 4-VCB09. To that purpose, we developed a new metric for measuring the degree of integration of the various DOF involved in a task. We have shown that it was efficient to integrate the manipulation of the DOF in a sinlge command when the level of precision required is low. However our results show that it is better to separate the control of the dimensions of manipulation for a task that requires a higher level of precision 4-VCB11.

Based on these results, we propose several new interaction techniques that allow an increased precision in order to realise modeling tasks in an immersive environment including: DIOD (Dynamic Decomposition and integration of degrees of freedom) 4-VCB10, CROS (Cursor On Surface) 8-Vei10. These techniques have been implemented in our modeling plateform for immersive environments: VRModelis.

Furthermore, we proposed several studies on the topic of haptic feedback. The first was to develop a haptic menu, dedicated to applications using this technology. The two objectives were firstly to allow the user to control the application with the same device they already use to interact, without returning to the mouse constantly, and secondly to leverage the force feedback to assist in the act of enforcing 3D device with 4-EC10, EC10-4, 4-EC09.

We also proposed several studies on haptic feedback. The first one was about a haptic 3D menu, dedicated to applications using this type of force feedback peripherals. The 2 main goals were to allow the user to control the application with the same peripheral without going forth and back to the mouse, and to take advantage of the force feedback to assist the gesture while controling the application with 3D controls CE10, EC10, EC09.

The second one was dealing with using haptic feedback to purposes that differed from the usual use : 99% of applications use haptic feedback for realistic simulations or assistance. We wished to take advantage of force feedback to materialize properties in the 3D space, either because they are not easy to display on a screen, or because we want to reduce the visual overload as too much information is often displayed on the screen simultaneously. Therefore, we are currently studying how to render some numerical values using force feedback, by considering various kinds of possible haptic responses (vibrations, viscosity, elastic or magnetic feedback,...) and studying their perception thresholds.

Perspectives

In the framework of haptic peripherals, we consider pursuing our efforts on 3D haptic menus and materialization of properties. On the 1st topic, we wish to enhance our menu, and compare it with classical 3D menus such as pie menus for instance. On the 2nd topic, we are going to experiment our approches for the materialization of properties on an application of automatic surgical planning, in order to represent the space of possible solutions with other means than visual, as many other information is already displayed on the 3D view (numerous anatomical structures, possibly displayed with different degrees of transparency and superimposed).