The effects of optical magnification/minimization on distance estimation by stationary and walking observers

Campos, Jennifer L.; Freitas, Patricia L. S.; Turner, Emma; Wong, Michael; Sun, Hong-Jin

doi:10.1167/7.9.1028

Cited by 2 publications

(2 citation statements)

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“…In a real environment, minifying or magnifying lenses can be used to perform the same manipulations. Previous work shows that minification and magnification can change perceived distance in real environments [Campos et al 2007], and minification can change perceived distances in HMD-based VEs [Kuhl et al 2006]. Since the HMD calibrations described in the present work were not performed in the previous study [Kuhl et al 2006], we wanted to replicate the result with a more accurately calibrated baseline condition.…”

Section: Environments With Minificationmentioning

confidence: 86%

HMD calibration and its effects on distance judgments

Kuhl

Thompson

Creem-Regehr

2008

Proceedings of the 5th Symposium on Applied Perception in Graphics and Visualization

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Most head-mounted displays (HMDs) suffer from substantial optical distortion, and vendor-supplied specifications for field-of-view often are at variance with reality. Such displays do not present perspective-related visual cues in a geometrically correct manner, which has the potential to affect applications of HMDs which depend on precise spatial perception. This paper provides empirical evidence for the degree to which these resulting distortions affect one type of spatial judgment in virtual environments. We show that minification in the HMD that would occur from an overstated HMD field of view results in a significant change in distance judgments. Incorrectly calibrated pitch and pincushion distortion, however, did not cause statistically significant changes in distance judgments for the degree of distortions examined. While the means for determining the optical distortion of display systems are well known, they are often not used in non-see-through HMDs due to problems in measuring and correcting for distortion. As a result, we also provide practical guidelines for creating geometrically calibrated systems.

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Section: Environments With Minificationmentioning

confidence: 86%

HMD calibration and its effects on distance judgments

Kuhl

Thompson

Creem-Regehr

2008

Proceedings of the 5th Symposium on Applied Perception in Graphics and Visualization

View full text Add to dashboard Cite

show abstract

“…In a real environment, minifying or magnifying lenses can be used to perform the same manipulations. Previous work shows that minification and magnification can change distance judgments in real [Campos et al 2007] and photographed [Smith 1958b;1958a;Lumsden 1983;Kraft and Green 1989;Rogers 1995] environments. Other studies have demonstrated that minification increases judgments of distance in HMD-based VEs [Kuhl et al 2006; and can counteract the distance compression commonly found in HMDs.…”

Section: Minification and Magnificationmentioning

confidence: 99%

HMD calibration and its effects on distance judgments

Kuhl

Thompson

Creem-Regehr

2009

ACM Trans. Appl. Percept.

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Most head-mounted displays (HMDs) suffer from substantial optical distortion, and vendor-supplied specifications for fieldof-view often are at variance with reality. Unless corrected, such displays do not present perspective-related visual cues in a geometrically correct manner. Distorted geometry has the potential to affect applications of HMDs, which depend on precise spatial perception. This article provides empirical evidence for the degree to which common geometric distortions affect one type of spatial judgment in virtual environments. We show that minification or magnification in the HMD that would occur from misstated HMD field of view causes significant changes in distance judgments. Incorrectly calibrated pitch and pincushion distortion, however, do not cause statistically significant changes in distance judgments for the degree of distortions examined. While the means for determining the optical distortion of display systems are well known, they are often not used in non-seethrough HMDs due to problems in measuring and correcting for distortion. As a result, we also provide practical guidelines for creating geometrically calibrated systems.

show abstract

The effects of optical magnification/minimization on distance estimation by stationary and walking observers

Cited by 2 publications

References 0 publications

HMD calibration and its effects on distance judgments

HMD calibration and its effects on distance judgments

HMD calibration and its effects on distance judgments

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