Disparity range for local stereopsis as a function of luminance spatial frequency

Schor, Clifton M.; Wood, Ivan C. J.

doi:10.1016/0042-6989(83)90179-7

Cited by 195 publications

(130 citation statements)

References 10 publications

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“…Their study used briefly presented stereoscopic stimuli, containing large disparities (between 1º and 10º). Observers in Schor and Wood's (1983) experiment for lowspatial-frequency stereograms (DOG patches) perceived less depth in crossed disparity than in uncrossed disparity. The results of other studies have been conflicting (e.g., Lasley, 1985;Schumer & Julesz, 1984;Woo & Sillanpaa, 1979), although they have demonstrated the existence of asymmetries (see Mustillo, 1985, for a review on the differences between crossed and uncrossed disparity).…”

Section: Resultsmentioning

confidence: 99%

Can exocentric direction be dissociated from its exocentric distance in virtual environments?

Aznar-Casanova

Matsushima

Silva

et al. 2008

Perception & Psychophysics

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Section: Resultsmentioning

confidence: 99%

Can exocentric direction be dissociated from its exocentric distance in virtual environments?

Aznar-Casanova

Matsushima

Silva

et al. 2008

Perception & Psychophysics

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“…Schor & Wood (1983) employed 100% contrast di¡erence-of-Gaussian stimuli to measure the maximum disparity at which depth is perceived as a function of frequency and also found a larger disparity range than predicted by sizedisparity correlation. However, these results are inconclusive as the use of such high-contrast stimuli will activate a wide range of spatial-frequency tuned detectors.…”

Section: Discussionmentioning

confidence: 99%

“…Surprisingly, there is still no consensus on whether the size-disparity constraint is actually employed in human stereopsis (Mayhew & Frisby 1979;Schor & Wood 1983;Smallman & MacLeod 1994). Smallman & MacLeod (1994) measured the minimum contrast required for disparity discrimination in bandpass-¢ltered noise stereograms as a function of disparity.…”

Section: Introductionmentioning

confidence: 99%

Size-disparity correlation in human binocular depth perception

Prince

Eagle

1999

Proc. R. Soc. Lond. B

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To use the small horizontal disparities between images projected to the eyes for the recovery of threedimensional information, our visual system must ¢rst identify which feature in one eye's image corresponds with which in the other. The earliest level of disparity processing in primates (V1) contains cells that are spatial-frequency tuned. If such cells have a disparity range that covers only a single period of their mean tuning frequency, there will always be exactly one potential match within this range. Here, this`size-disparity' hypothesis was tested by measuring the contrast sensitivity of stereopsis as a function of disparity for single bandpass-¢ltered items. It was found that thresholds were low and relatively constant up to disparities an order of magnitude larger than is predicted by this constraint. Furthermore, peak sensitivity was relatively independent of spatial frequency. A control experiment showed that binocular correlation of the carrier is necessary for this task. In a third experiment, the maximum disparity that supports threshold performance was compared for an isolated bandpass item and bandpass-¢ltered noise. This limit was found to be ¢ve times larger for the isolated stimuli. In summary, these ¢ndings show that the initial stage of disparity detection is not limited by the size-disparity constraint. For stimuli with multiple false targets, however, processes subsequent to this stage reduce the disparity range over which the correspondence problem can be solved.

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“…These interactions generate populations of disparity-sensitive cells that realize a size-disparity correlation (Julesz & Schumer, 1981;Kulikowski, 1978;Richards & Kaye, 1974;Schor & Tyler, 1981;Schor & Wood, 1983;Schor, Wood, & Ogawa, 1984;Tyler, 1975Tyler, , 1983. In particular, com-.…”

Section: Filling-in Of Monocular Surface Representationsmentioning

confidence: 99%

Cortical dynamics of three-dimensional figure–ground perception of two-dimensional pictures.

Grossberg¹

1997

Psychological Review

189

254

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This article develops the FACADE theory of 3-dimensional (3-D) vision and figure-ground separation to explain data concerning how 2-dimensional pictures give rise to 3-D percepts of occluding and occluded objects. The model describes how geometrical and contrastive properties of a picture can either cooperate or compete when fonning the boundaries and surface representations that subserve conscious percepts. Spatially long-range cooperation and spatially short-range competition work together to separate the boundaries of occluding figures from their occluded neighbors. This boundary ownership process is sensitive to image T junctions at which occluded figures contact occluding figures. These boundaries control the filling-in of color within multiple depth-sensitive surface representations. Feedback between surface and boundary representations strengthens consistent boundaries while inhibiting inconsistent ones. Both the boundary and the surface representations of occluded objects may be amodally completed, while the surface representations of unoccluded objects become visible through modal completion. Functional roles for conscious modal and amodal representations in object recognition, spatial attention, and reaching behaviors are discussed. Model interactions are interpreted in tenns of visual, temporal, and parietal cortices.

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Disparity range for local stereopsis as a function of luminance spatial frequency

Cited by 195 publications

References 10 publications

Can exocentric direction be dissociated from its exocentric distance in virtual environments?

Can exocentric direction be dissociated from its exocentric distance in virtual environments?

Size-disparity correlation in human binocular depth perception

Cortical dynamics of three-dimensional figure–ground perception of two-dimensional pictures.

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