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2025-04-18 11:21:19 +02:00
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@@ -183,7 +183,7 @@ The integration of the real and virtual sensations into a single property percep
In particular, the visual rendering of a touched object can also influence the perception of its haptic properties, \eg by modifying its visual texture in \AR or \VR, as discussed in the \secref{visuo_haptic}.
\textcite{bhatia2024augmenting} categorize the haptic augmentations into three types: direct touch, touch-through, and tool-mediated.
In \emph{direct touch}, the haptic device does not cover the inside of the hand so as not to impair the user's interaction with the \RE, and is typically achieved with wearable haptics.
In \emph{direct touch}, the haptic device does not cover the inside of the hand so as not to impair the interaction of the user with the \RE, and is typically achieved with wearable haptics.
In touch-through and tool-mediated, or \emph{indirect feel-through} \cite{jeon2015haptic}, the haptic device is placed between the hand and the \RE.
%We are interested in direct touch augmentations with wearable haptics (\secref{wearable_haptic_devices}), as their integration with \AR is particularly promising for free hand interaction with visuo-haptic augmentations.
Many haptic augmentations were first developed with touch-through devices, and some (but not all) were later transposed to direct touch augmentation with wearable haptic devices.

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@@ -144,6 +144,8 @@ Choosing useful and efficient \UIs and interaction techniques is crucial for the
\textcite{laviolajr20173d} (p.385) classify interaction techniques into three categories based on the tasks they enable users to perform: manipulation, navigation, and system control.
\textcite{hertel2021taxonomy} proposed a similar taxonomy of interaction techniques specifically for \AR headsets.
\comans{JG}{In, Figure 2.24 I suggest removing d. or presenting it as separate figure as it shows no interaction technique (The caption is “Interaction techniques in AR” but a visualization of a spatial registration technique).}{It has been removed and replaced by an example of resizing a virtual object.}
In this thesis we focus on manipulation tasks of virtual content directly with the hands, more specifically on touching visuo-haptic textures with a finger (\partref{perception}) and positioning and rotating virtual objects pushed and grasp by the hand (\partref{manipulation}).
The \emph{manipulation tasks} are the most fundamental tasks in \AR and \VR systems, and the building blocks for more complex interactions.
\emph{Selection} is the identification or acquisition of a specific virtual object, \eg pointing at a target as in \figref{grubert2015multifi}, touching a button with a finger, or grasping an object with a hand.
@@ -157,9 +159,6 @@ Wayfinding is the cognitive planning of the movement, such as path finding or ro
The \emph{system control tasks} are changes to the system state through commands or menus such as creating, deleting, or modifying virtual objects, \eg as in \figref{roo2017onea}. It is also the input of text, numbers, or symbols.
\comans{JG}{In, Figure 2.24 I suggest removing d. or presenting it as separate figure as it shows no interaction technique (The caption is “Interaction techniques in AR” but a visualization of a spatial registration technique).}{It has been removed and replaced by an example of resizing a virtual object.}
In this thesis we focus on manipulation tasks of virtual content directly with the hands, more specifically on touching visuo-haptic textures with a finger (\partref{perception}) and positioning and rotating virtual objects pushed and grasp by the hand (\partref{manipulation}).
\begin{subfigs}{interaction-techniques}{Interaction techniques in \AR. }[][
\item Spatial selection of virtual item of an extended display using a hand-held smartphone \cite{grubert2015multifi}.
\item Resizing a virtual object with a bimanual gesture \cite{piumsomboon2013userdefined}.