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Corrections from Claudio's comments

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Erwan Normand
2024-10-21 11:24:14 +02:00
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2-related-work/3-augmented-reality.tex
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@@ -222,9 +222,11 @@ An alternative is to use a single \emph{universal} tangible object like a hand-h
These \emph{time-multiplexed} interfaces require interaction techniques that allow the user to pair the tangible with any virtual object, \eg by placing the tangible into the virtual object and pressing the fingers \cite{issartel2016tangible} (\figref{issartel2016tangible}), similar to a real grasp (\secref{grasp_types}).
Still, the virtual visual rendering and the real haptic sensations can be incoherent.
Especially in \OST-\AR, since the virtual objects are inherently slightly transparent allowing the paired real objects to be seen through them.
In a pick-and-place task with real objects, a difference in size \cite{kahl2021investigation} (\figref{kahl2021investigation}) and shape \cite{kahl2023using} (\figref{kahl2023using_1}) of the virtual objects does not affect user performance or presence, and that small variations (\percent{\sim 10} for size) were not even noticed by the users.
This suggests the feasibility of using simplified real obejcts in \AR whose spatial properties (\secref{object_properties}) abstract those of the virtual objects.
In \VR, some discrepancy between the real and virtual objects is acceptable because the real object is not visible to the user \cite{detinguy2019how,detinguy2019universal}.
In \AR, however, the real object may be partially or fully visible, and the user can see that their hand is not touching the real and virtual objects at the same time.
This is particularly true in \OST-\AR, where the virtual objects are inherently slightly transparent allowing the paired real objects to be seen through them \cite{macedo2023occlusion}.
In a pick-and-place task with real objects in \OST-\AR, a difference in size \cite{kahl2021investigation} (\figref{kahl2021investigation}) and shape \cite{kahl2023using} (\figref{kahl2023using_1}) of the virtual objects does not affect user performance or presence, and that small variations (\percent{\sim 10} for size) were not even noticed by the users.
This suggests the feasibility of using simplified real objects in \AR whose spatial properties (\secref{object_properties}) abstract those of the virtual objects.
Similarly, in \secref{tactile_rendering} we described how a material property (\secref{object_properties}) of a touched real object can be modified using wearable haptic devices \cite{detinguy2018enhancing,salazar2020altering}: it could be used to render coherent visuo-haptic material perceptions directly touched with the hand in \AR.
\begin{subfigs}{ar_tangibles}{Manipulating virtual objects through real objects. }[][