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@@ -88,8 +88,8 @@ A sample $r(t_j, t_k)$ of the audio signal at sampling time $t_k$, with $t_k >=
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\begin{subequations}
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\begin{subequations}
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\label{eq:signal}
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\label{eq:signal}
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\begin{align}
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\begin{align}
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r(t_j, t_k) & = A\, \text{sgn} ( \sin (2 \pi \frac{\dot{x}\,(t_j)}{\lambda} t_k + \phi_j ) ) & \label{eq:signal_speed} \\
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r(t_j, t_k) & = A\, \text{sgn} ( \sin (2 \pi \frac{\dot{x}\,(t_j)}{\lambda} t_k + \phi(t_j) ) ) & \label{eq:signal_speed} \\
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\phi_j & = \phi_{j-1} + 2 \pi \frac{\dot{x}\,(t_j) - \dot{x}\,(t_j - 1)}{\lambda} t_k & \label{eq:signal_phase}
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\phi(t_j) & = \phi(t_{j-1}) + 2 \pi \frac{\dot{x}\,(t_j) - \dot{x}\,(t_{j-1})}{\lambda} t_k & \label{eq:signal_phase}
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\end{align}
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\end{align}
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\end{subequations}
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\end{subequations}
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@@ -97,7 +97,7 @@ This rendering preserves the sensation of a constant spatial frequency of the vi
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%Note that the finger position and velocity are transformed from the camera frame $\poseFrame{c}$ to the texture frame $\poseFrame{t}$, with the $x$ axis aligned with the texture direction.
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%Note that the finger position and velocity are transformed from the camera frame $\poseFrame{c}$ to the texture frame $\poseFrame{t}$, with the $x$ axis aligned with the texture direction.
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%However, when a new finger position is estimated at time $t_j$, the phase $\phi_j$ needs to be adjusted as well with the frequency to ensure a continuity in the signal as described in \eqref{signal_phase}.
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%However, when a new finger position is estimated at time $t_j$, the phase $\phi(t_j)$ needs to be adjusted as well with the frequency to ensure a continuity in the signal as described in \eqref{signal_phase}.
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The phase matching avoids sudden changes in the actuator movement thus affecting the texture perception in an uncontrolled way (\figref{phase_adjustment}) and, contrary to previous work \cite{asano2015vibrotactile,ujitoko2019modulating}, it enables a free exploration of the texture by the user with no constraints on the finger speed.
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The phase matching avoids sudden changes in the actuator movement thus affecting the texture perception in an uncontrolled way (\figref{phase_adjustment}) and, contrary to previous work \cite{asano2015vibrotactile,ujitoko2019modulating}, it enables a free exploration of the texture by the user with no constraints on the finger speed.
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A square wave is chosen to get a rendering closer to a real grating texture with the sensation of crossing edges \cite{ujitoko2019modulating}, and because the roughness perception of sine wave textures has been shown not to reproduce the roughness perception of real grating textures \cite{unger2011roughness}.
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A square wave is chosen to get a rendering closer to a real grating texture with the sensation of crossing edges \cite{ujitoko2019modulating}, and because the roughness perception of sine wave textures has been shown not to reproduce the roughness perception of real grating textures \cite{unger2011roughness}.
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@@ -3,6 +3,13 @@
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\nochaptertoc
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\nochaptertoc
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% Résumé vulgarisé en 700 caractères
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% Les dispositifs haptiques portables procurent des sensations tactiles tout en étant compacts.
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% Mais ils ont été peu utilisés en réalité augmentée (RA), où le contenu virtuel est intégré à la perception du monde réel.
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% Cette thèse explore leur potentiel pour améliorer les interactions de la main avec des objets virtuels en RA.
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% Nous étudions d'abord l'impact du rendu visuel sur la perception des textures vibrotactiles virtuelles qui augmentent des surfaces réelles touchées directement par le doigt.
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% Nous étudions ensuite comment des retours sensoriels visuo-haptiques augmentant la main améliorent les performances et l’expérience utilisateur lors de la manipulation d'objets virtuels en RA.
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\selectlanguage{french}
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\selectlanguage{french}
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Dans ce manuscrit de thèse, nous montrons comment la \emph{réalité augmentée (RA)}, qui intègre un contenu visuel virtuel dans la perception du monde réel, et l'\emph{haptique portable}, qui fournit des sensations tactiles sur la peau, peuvent améliorer les interactions de la main avec des objets virtuels et augmentés.
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Dans ce manuscrit de thèse, nous montrons comment la \emph{réalité augmentée (RA)}, qui intègre un contenu visuel virtuel dans la perception du monde réel, et l'\emph{haptique portable}, qui fournit des sensations tactiles sur la peau, peuvent améliorer les interactions de la main avec des objets virtuels et augmentés.
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@@ -2614,7 +2614,7 @@
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title = {Enlarging a {{Smartphone}} with {{AR}} to {{Create}} a {{Handheld VESAD}} ({{Virtually Extended Screen-Aligned Display}})},
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title = {Enlarging a {{Smartphone}} with {{AR}} to {{Create}} a {{Handheld VESAD}} ({{Virtually Extended Screen-Aligned Display}})},
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booktitle = {{{IEEE Int}}. {{Symp}}. {{Mix}}. {{Augment}}. {{Real}}.},
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booktitle = {{{IEEE Int}}. {{Symp}}. {{Mix}}. {{Augment}}. {{Real}}.},
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author = {Normand, Erwan and McGuffin, Michael J.},
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author = {Normand, Erwan and McGuffin, Michael J.},
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date = {2018},
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date = {2018-10},
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pages = {123--133},
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pages = {123--133},
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doi = {10/gm7xsc}
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doi = {10/gm7xsc}
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}
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}
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@@ -2630,7 +2630,7 @@
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@article{normand2024visuohaptic,
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@article{normand2024visuohaptic,
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title = {Visuo-{{Haptic Rendering}} of the {{Hand}} during {{3D Manipulation}} in {{Augmented Reality}}},
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title = {Visuo-{{Haptic Rendering}} of the {{Hand}} during {{3D Manipulation}} in {{Augmented Reality}}},
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author = {Normand, Erwan and Pacchierotti, Claudio and Marchand, Eric and Marchal, Maud},
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author = {Normand, Erwan and Pacchierotti, Claudio and Marchand, Eric and Marchal, Maud},
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date = {2024},
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date = {2024-01},
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journaltitle = {IEEE Trans. Haptics},
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journaltitle = {IEEE Trans. Haptics},
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volume = {17},
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volume = {17},
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number = {2},
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number = {2},
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