HMD calibration and its effects on distance judgments

Kuhl, Scott A.; Thompson, William B.; Creem-Regehr, Sarah H.

doi:10.1145/1394281.1394284

Cited by 37 publications

(38 citation statements)

References 16 publications

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“…We recommend consulting their strategy for correcting and calibrating an HMD. Kuhl et al (2009) reported that the presence or absence of pincushion correction (at the levels they tested) had no effect on judgments of distance. However, our informal observations regarding the perception of slanted surfaces with and without correction suggest that there might be couraged to scan a scene.…”

Section: P Smentioning

confidence: 88%

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Controlled interaction: Strategies for using virtual reality to study perception

Durgin

2010

Behavior Research Methods

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Section: P Smentioning

confidence: 88%

“…A participant sat in a comfortable chair while looking at displays that were either corrected using an HLSL shader or presented uncorrected. Our correction constant was .3 (see Kuhl et al, 2009, for an explanation of this parameter).…”

Section: Apparatusmentioning

confidence: 99%

Controlled interaction: Strategies for using virtual reality to study perception

Durgin

2010

Behavior Research Methods

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“…It would seem that the first person view of one's own body is powerful enough to counteract the visuo-tactile conflict during asynchronous stimulation. It should be mentioned though that even calibrated HMDs are not free of geometric distortions (Kuhl et al 2009) which could have some influence on the estimation of the relative position of the virtual with respect to the real hand. However, it has also been found that such egocentric distance judgments improve when the participant is represented by an avatar (Mohler et al 2010).…”

Section: Proprioceptive Driftmentioning

confidence: 99%

Is my hand connected to my body? The impact of body continuity and arm alignment on the virtual hand illusion

2011

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When a rubber hand is placed on a table top in a plausible position as if part of a person's body, and is stroked synchronously with the person's corresponding hidden real hand, an illusion of ownership over the rubber hand can occur (Botvinick and Cohen 1998). A similar result has been found with respect to a virtual hand portrayed in a virtual environment, a virtual hand illusion (Slater et al. 2008). The conditions under which these illusions occur have been the subject of considerable study. Here we exploited the flexibility of virtual reality to examine four contributory factors: visuo-tactile synchrony while stroking the virtual and the real arms, body continuity, alignment between the real and virtual arms, and the distance between them. We carried out three experiments on a total of 32 participants where these factors were varied. The results show that the subjective illusion of ownership over the virtual arm and the time to evoke this illusion are highly dependent on synchronous visuo-tactile stimulation and on connectivity of the virtual arm with the rest of the virtual body. The alignment between the real and virtual arms and the distance between these were less important. It was found that proprioceptive drift was not a sensitive measure of the illusion, but was only related to the distance between the real and virtual arms.

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“…In comparison, action-based judgments of egocentric distance in virtual environments are commonly only 50 %-85 % of the modeled distance (i.e., the distance intended by the designer of the virtual environment; Bodenheimer et al, 2007;Gooch & Willemsen, 2002;Kelly, Beall, & Loomis, 2004;Knapp & Loomis, 2004;Kuhl, Thompson, & Creem-Regehr, 2009;Messing & Durgin, 2005;Steinicke et al, 2009;Thompson et al, 2004;Waller & Richardson, 2008;Willemsen, Colton, Creem-Regehr, & Thompson, 2009;Willemsen, Gooch, Thompson, & CreemRegehr, 2008;Witmer & Sadowski, 1998;Ziemer, Plumert, Cremer, & Kearney, 2009).…”

mentioning

confidence: 99%

More than just perception–action recalibration: Walking through a virtual environment causes rescaling of perceived space

Kelly

Donaldson

Sjolund

et al. 2013

Atten Percept Psychophys

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Egocentric distances in virtual environments are commonly underperceived by up to 50 % of the intended distance. However, a brief period of interaction in which participants walk through the virtual environment while receiving visual feedback can dramatically improve distance judgments. Two experiments were designed to explore whether the increase in postinteraction distance judgments is due to perception-action recalibration or the rescaling of perceived space. Perception-action recalibration as a result of walking interaction should only affect action-specific distance judgments, whereas rescaling of perceived space should affect all distance judgments based on the rescaled percept. Participants made blind-walking distance judgments and verbal size judgments in response to objects in a virtual environment before and after interacting with the environment through either walking (Experiment 1) or reaching (Experiment 2). Size judgments were used to infer perceived distance under the assumption of size-distance invariance, and these served as an implicit measure of perceived distance. Preinteraction walking and size-based distance judgments indicated an underperception of egocentric distance, whereas postinteraction walking and size-based distance judgments both increased as a result of the walking interaction, indicating that walking through the virtual environment with continuous visual feedback caused rescaling of the perceived space. However, interaction with the virtual environment through reaching had no effect on either type of distance judgment, indicating that physical translation through the virtual environment may be necessary for a rescaling of perceived space. Furthermore, the size-based distance and walking distance judgments were highly correlated, even across changes in perceived distance, providing support for the sizedistance invariance hypothesis.Keywords Visual perception . Distance perception . Virtual reality . Action Immersive virtual reality technology has numerous applications, including physical and psychological rehabilitation, education, training, entertainment, and human behavioral research. In order to be fully effective in these applications, virtual environments should be perceived as realistic representations of actual environments. One consistent challenge in creating realistic virtual environments is the tendency for underperception of distances, resulting in virtual environments that appear smaller than their real-world counterparts.In real environments under full-cue viewing, the perception of egocentric distance-the distance from oneself to an object -can be quite accurate. Perceived egocentric distance has been measured in multiple ways, including verbal numerical report (da Silva, 1985;Foley,

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HMD calibration and its effects on distance judgments

Cited by 37 publications

References 16 publications

Controlled interaction: Strategies for using virtual reality to study perception

Controlled interaction: Strategies for using virtual reality to study perception

Is my hand connected to my body? The impact of body continuity and arm alignment on the virtual hand illusion

More than just perception–action recalibration: Walking through a virtual environment causes rescaling of perceived space

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