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Personified and Multistate Camera Motions for First-Person Navigation in Desktop Virtual Reality

Leo Terziman, Maud Marchal, Franck Multon, Bruno Arnaldi, Anatole Lecuyer
2013 IEEE Transactions on Visualization and Computer Graphics  
Running over a strong positive slope would rapidly decrease the advance speed of the avatar, increase its energy loss, and eventually change the locomotion mode, influencing the visual feedback of the  ...  We have conducted a series of experiments to evaluate the perception of our new CMs by naive participants.  ...  Indeed, the visual flow influences the perception of self-motion [9] .  ... 
doi:10.1109/tvcg.2013.38 pmid:23428450 fatcat:lqruydlq5bbedesytlyes3l4te

Walking Without Moving [article]

Niels Chr. Nilsson
2016 Ph.d.-serien for Det Teknisk-Naturvidenskabelige Fakultet, Aalborg Universitet  
Thus, step frequency may have less of an influence on gain perception during WIP locomotion compared to treadmill walking.  ...  Paper F: The Influence of Step Frequency on the Range of Perceptually Natural Visual Walking Speeds During Walking-in-Place and Treadmill Locomotion Motivation: It has been proposed that our visual perception  ...  This paper details three studies investigating the effects of visual display properties and gain presentation mode on the perceived naturalness of virtual walking speeds: The first study compared three  ... 
doi:10.5278/vbn.phd.engsci.00157 fatcat:ackk76zvbnh7jmmar3l43phahy

Matching optical flow to motor speed in virtual reality while running on a treadmill

Martina Caramenti, Claudio L. Lafortuna, Elena Mugellini, Omar Abou Khaled, Jean-Pierre Bresciani, Amandine Dubois, Markus Lappe
2018 PLoS ONE  
We investigated how visual and kinaesthetic/efferent information is integrated for speed perception in running.  ...  Twelve moderately trained to trained subjects ran on a treadmill at three different speeds (8, 10, 12 km/h) in front of a moving virtual scene.  ...  The authors also thank Thibaut Le Naour (Department of Medicine, University of Fribourg, Fribourg, Switzerland) for his help in the creation of the representation of the experimental set-up (Fig 1) .  ... 
doi:10.1371/journal.pone.0195781 pmid:29641564 pmcid:PMC5895071 fatcat:mmqeoodlybgjlgve6nrnjevsx4

Walking in Place Through Virtual Worlds [chapter]

Niels Christian Nilsson, Stefania Serafin, Rolf Nordahl
2016 Lecture Notes in Computer Science  
Subsequently we review existing approaches to WIP locomotion and highlight the need for a more explicit focus on the perceived naturalness of WIP techniques; i.e., the degree to which WIP locomotion feels  ...  Immersive virtual reality (IVR) is seemingly on the verge of entering the homes of consumers. Enabling users to walk through virtual worlds in a limited physical space presents a challenge.  ...  S6 provided some indication that high step frequencies may be accompanied by an increased underestimation of the visually presented speeds.  ... 
doi:10.1007/978-3-319-39516-6_4 fatcat:yl2xjcgusvao3ju4gsignwiqhu

The influence of visual flow and perceptual load on locomotion speed

Casimir J.H. Ludwig, Nicholas Alexander, Kate L. Howard, Alicja A. Jedrzejewska, Isha Mundkur, David Redmill
2017 Attention, Perception & Psychophysics  
Visual flow is used to perceive and regulate movement speed during locomotion.  ...  We assessed the extent to which variation in flow from the ground plane, arising from static visual textures, influences locomotion speed under conditions of concurrent perceptual load.  ...  Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http:// creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution  ... 
doi:10.3758/s13414-017-1417-3 pmid:28929440 pmcid:PMC5735212 fatcat:tz2v63xz7nfhzm35csftscp4bm

Self-motion processing in visual and entorhinal cortices: Inputs, integration, and implications for position coding

Malcolm G Campbell, Lisa M Giocomo
2018 Journal of Neurophysiology  
We focus on several key sources of self-motion information to MEC: the medial septum, which provides locomotor speed information; visual cortex, whose input has been increasingly recognized as essential  ...  Here, we summarize classic and recent work on self-motion coding in the visual and entorhinal cortices of the rodent brain.  ...  THE INFLUENCE OF LOCOMOTION ON RODENT VISUAL CORTEX: SOURCES OF LOCOMOTION SIGNALS TO V1 Like primate regions MST and VIP, multiple sensory signals related to self-motion influence the activity of visual  ... 
doi:10.1152/jn.00686.2017 pmid:30089025 pmcid:PMC6230811 fatcat:zf7lg72ekzbhxdd6ggjl6ifp6m

Visual influence on human locomotion Modulation to changes in optic flow

T. Prokop, M. Schubert, W. Berger
1997 Experimental Brain Research  
The effect of an optic flow pattern on human locomotion was studied in subjects walking on a selfdriven treadmill.  ...  modulating effect of rOF on the self-chosen WV.  ...  In humans the influence of optic flow on the perception of ego-motion has been described (Larish and Flach 1990) , and during stance visual information is known to have an influence on the subjects' performance  ... 
doi:10.1007/pl00005624 pmid:9125452 fatcat:zsko2yeefbaqbcr7f4h33625tu

No Evidence That Frontal Optical Flow Affects Perceived Locomotor Speed and Locomotor Biomechanics When Running on a Treadmill

Martina Caramenti, Claudio L. Lafortuna, Elena Mugellini, Omar Abou Khaled, Jean-Pierre Bresciani, Amandine Dubois
2019 Applied Sciences  
The results did not show any effect of the presence and manipulation of the optical flow either on perceived locomotor speed or on the biomechanics of treadmill running.  ...  We investigated how the presentation and the manipulation of an optical flow while running on a treadmill affect perceived locomotor speed (Experiment 1) and gait parameters (Experiment 2).  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/app9214589 fatcat:uteipjhhnfetzpwo27gmmf4pme

Vision-Guided Quadrupedal Locomotion in the Wild with Multi-Modal Delay Randomization [article]

Chieko Sarah Imai, Minghao Zhang, Yuchen Zhang, Marcin Kierebinski, Ruihan Yang, Yuzhe Qin, Xiaolong Wang
2021 arXiv   pre-print
Our key insight is that aside from the discrepancy in the domain gap, in visual appearance between the simulation and the real world, the latency from the control pipeline is also a major cause of difficulty  ...  We demonstrate the robot can smoothly maneuver at a high speed, avoid the obstacles, and show significant improvement over the baselines.  ...  To simulate the perception latency for visual observation at a lower frequency, we obtain the simulated visual observation at every control step and store the near past frames into a queue.  ... 
arXiv:2109.14549v1 fatcat:67nwk3tjfrabzo7sbqqmtp5djy

Walk Ratio: Perception of an Invariant Parameter of Human Walk on Virtual Characters

Benjamin Niay, Anne-Hélène Olivier, Katja Zibrek, Julien Pettré, Ludovic Hoyet
2020 ACM Symposium on Applied Perception 2020  
frequency), when motions are displayed on virtual characters.  ...  To this end, we captured 2 female and 2 male actors walking at different freely chosen speeds, as well as at different combinations of step frequency and step length.  ...  This work was funded by the French ANR as part of the JCJC Per 2 project (ANR-18-CE33-0013).  ... 
doi:10.1145/3385955.3407926 fatcat:pviqji2p5zgjbclusxweozzz6a

The Untapped Potential of Virtual Reality in Rehabilitation of Balance and Gait in Neurological Disorders

Emily A. Keshner, Anouk Lamontagne
2021 Frontiers in Virtual Reality  
A large body of literature exists to support the impact of visual flow, visual conditions, and visual perception on the planning and execution of movement.  ...  Finally, we discuss how these findings should influence future treatment design.  ...  Beyond studies examining the perception of optic flow perception, our group has also examined the use of optic flow during locomotion by manipulating the direction or speed of the virtual environment  ... 
doi:10.3389/frvir.2021.641650 pmid:33860281 pmcid:PMC8046008 fatcat:fhag4ajgbngr7oo4a3weskurzq

Self-generated sounds of locomotion and ventilation and the evolution of human rhythmic abilities

Matz Larsson
2013 Animal Cognition  
Theoretical models and research data suggest that noise of locomotion and ventilation may mask critical auditory information. People often synchronize steps subconsciously.  ...  may stimulate the evolution of synchronized behavior. (4) Bipedal gait and the associated sounds of locomotion influenced the evolution of human rhythmic abilities.  ...  Audiology, Ö UH for consultations about auditory perception; Margareta Landin at the Medical Library Ö UH; Nyckelfonden, Ö rebro County Council for a postdoctoral grant; and The Cardiology Clinic Ö UH  ... 
doi:10.1007/s10071-013-0678-z pmid:23990063 pmcid:PMC3889703 fatcat:alsmylsz65e5di5rfy4ganb72e

Optical modulation of locomotion and energy expenditure at preferred transition speed

Perrine Guerin, Benoît G. Bardy
2008 Experimental Brain Research  
The effect of optical flow on locomotion stability and efficiency was evaluated at preferred walk-run transition speed (PTS).  ...  Three experimental conditions of optical flow were tested: optical flow velocity consistent with locomotion speed (C), optical flow velocity twice faster (F) or slower (S) than locomotion speed.  ...  Bardy (IUF 2002 :2006 , and by SKILLS, an Integrated Project (IST contract #035005) of the Commission of the European Community. We thank Mathilde Airaud for English corrections.  ... 
doi:10.1007/s00221-008-1435-4 pmid:18535822 fatcat:bvdghgdphvf77loiazmifp2fiy

Optic Flow Contribution to Locomotion Adjustments in Obstacle Avoidance

Marcos Rodrigo Trindade Pinheiro Menuchi, Lilian Teresa Bucken Gobbi
2012 Motor Control  
The aim was to investigate the contribution of optic flow in obstacle avoidance by using a stroboscopic lamp. Ten young adults walked on an 8m pathway and stepped over obstacles at two heights.  ...  Locomotion generates a visual movement pattern characterized as optic flow.  ...  In the varied sampling conditions, the height of the obstacle was expected to influence the strategies adopted during step-over.  ... 
doi:10.1123/mcj.16.4.506 fatcat:3rxk5m4uhfbevg5qnohmthwnim

Forward optic flow is prioritised in visual awareness independently of walking direction

Paweł Motyka, Mert Akbal, Piotr Litwin
2021 PLoS ONE  
Here, we investigated whether one's direction of locomotion affects perceptual access to optic flow patterns during binocular rivalry.  ...  However, despite our ability to infer perceptual consequences from bodily movements, evidence that action can have an analogous influence on visual awareness is scarce and mainly limited to hand movements  ...  influences on visual awareness.  ... 
doi:10.1371/journal.pone.0250905 pmid:33945563 pmcid:PMC8096117 fatcat:n7r3snfxmjg7hgkenmb73ymkka
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