Complete related work

1-introduction/related-work/4-visuo-haptic-ar.tex

@@ -2,8 +2,9 @@
 \label{visuo_haptic}
 
 Everyday perception and manipulation of objects with the hand typically involves both the visual and haptic senses.
-Each sense has unique capabilities for perceiving certain object properties, such as color for vision or temperature for touch, but they are equally capable for many material properties, such as roughness, hardness, or friction \cite{baumgartner2013visual}.
-Rendering a \VO with both visual and haptic feedback that feels coherent is a challenge, especially in immersive \AR where the haptic actuator is moved away so as not to cover the inside of the hand.
+Each sense has unique capabilities for perceiving certain object properties, such as color for vision or temperature for touch, but they are equally capable for many properties, such as roughness, hardness, or geometry \cite{baumgartner2013visual}.
+Both \AR and wearable haptic systems integrate virtual content into the user's perception as sensory illusions.
+It is essential to understand how a multimodal visuo-haptic rendering of a \VO is perceived.%, especially in immersive \AR where the haptic actuator is moved away so as not to cover the inside of the hand.
 
 % Answer the following four questions: “Who else has done work with relevance to this work of yours? What did they do? What did they find? And how is your work here different?”
 
@@ -21,10 +22,6 @@ Rendering a \VO with both visual and haptic feedback that feels coherent is a ch
 \subsection{Visuo-Haptic Perception of Virtual and Augmented Objects}
 \label{sensations_perception}
 
-Both \AR and wearable haptic systems integrate virtual content into the user's perception as sensory illusions.
-It is essential to understand how a multimodal visuo-haptic rendering of a \VO is perceived.
-
-
 \subsubsection{Merging the Sensations into a Perception}
 \label{sensations_perception}
 
@@ -162,7 +159,7 @@ We describe in the next section how wearable haptics have been integrated with i
 
 A few wearable haptic devices have been specifically designed or experimentally tested for direct hand interaction in immersive \AR.
 Since virtual or augmented objects are naturally touched, grasped, and manipulated directly with the fingertips (\secref{exploratory_procedures} and \secref{grasp_types}), the main challenge of wearable haptics for \AR is to provide haptic sensations of these interactions while keeping the fingertips free to interact with the \RE.
-Several approaches have been proposed to move the actuator to a different location on the hand.
+Several approaches have been proposed to move the haptic actuator to a different location on the hand.
 Yet, they differ greatly in the actuators used (\secref{wearable_haptic_devices}), thus the haptic feedback (\secref{tactile_rendering}), and the placement of the haptic rendering.
 
 Other wearable haptic actuators have been proposed for \AR, but are not discussed here.