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Transitions between chapters

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Erwan Normand
2024-10-28 09:23:04 +01:00
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3-perception/vhar-textures/1-introduction.tex
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\section{Introduction}
\label{intro}
In the previous chapter, we investigated the role of the visual feedback of the virtual hand and the environment (\AR \vs \VR) on the perception of wearable haptic texture augmentation.
In this chapter, we explore the perception of wearable visuo-haptic texture augmentation of real surfaces touched directly with the finger in an immersive \AR context and without a virtual hand overlay.
When we look at the surface of an everyday object, we then touch it to confirm or contrast our initial visual impression and to estimate the properties of the object, particularly its texture (\secref[related_work]{visual_haptic_influence}).
Among the various haptic texture augmentations, data-driven methods allow to capture, model and reproduce the roughness perception of real surfaces when touched by a hand-held stylus (\secref[related_work]{texture_rendering}).
Databases of visuo-haptic textures have been developed in this way \cite{culbertson2014one,balasubramanian2024sens3}, but they have not yet been explored in an immersive and direct touch context with \AR and wearable haptics.

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3-perception/vhar-textures/5-conclusion.tex
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This paves the way for new \AR applications capable of augmenting a \RE with virtual visuo-haptic textures, such as visuo-haptic painting in artistic or object design context, or viewing and touching virtual objects in a museum or a showroom.
The latter is illustrated in \figref{experiment/use_case}, where a user applies different visuo-haptic textures to a wall, in an interior design scenario, to compare them visually and by touch.
We instinctively perceive the properties of everyday objects by touching and exploring them, but we essentially interact with them by grasping in order to manipulate them.
In this first part, we focused on the perception of wearable and immersive virtual textures that augment real surfaces when touched with the fingertip.
In the next part, we improve the direct manipulation with the hand of virtual object with wearable visuo-haptic interaction feedback.
\noindentskip This work was presented and published at the EuroHaptics 2024 conference:
Erwan Normand, Claudio Pacchierotti, Eric Marchand, and Maud Marchal.