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Erwan Normand
2024-09-27 22:10:59 +02:00
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3-manipulation/visuo-haptic-hand/1-introduction.tex
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Providing haptic feedback during free-hand manipulation in \AR is not trivial, as wearing haptic devices on the hand might affect the tracking capabilities of the system \cite{pacchierotti2016hring}.
\noindent Providing haptic feedback during free-hand manipulation in \AR is not trivial, as wearing haptic devices on the hand might affect the tracking capabilities of the system \cite{pacchierotti2016hring}.
Moreover, it is important to leave the user capable of interacting with both virtual and real objects, avoiding the use of haptic interfaces that cover the fingertips or palm.
For this reason, it is often considered beneficial to move the point of application of the haptic rendering elsewhere on the hand (\secref[related_work]{vhar_haptics}).
However, the impact of the positioning of the haptic rendering on the hand during direct hand manipulation in \AR has not been systematically studied.
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\noindentskip In the next sections, we first describe the four delocalized positionings and the two contact vibration techniques we considered, based on previous work. We then present the experimental setup and design of the user study. Finally, we report the results and discuss them in the context of the free hand interaction with virtual content in \AR.
\bigskip
\fig[0.6]{method/locations}{Setup of the vibrotactile positionings on the hand.}[
To ensure minimal encumbrance, we used the same two motors throughout the experiment, moving them to the considered positioning before each new experimental block (in this case, on the co-located \level{Proximal} phalange).
Thin self-gripping straps were placed on the five considered positionings during the entirety of the experiment.