Influence of surface attitude and curvature scaling on discrimination of binocularly presented curved surfaces

Sjoerd C. De Vries; Astrid M L Kappers; Jan J. Koenderink

doi:10.1016/0042-6989(94)90285-2

Influence of surface attitude and curvature scaling on discrimination of binocularly presented curved surfaces

Sjoerd C. De Vries^*, Astrid M L Kappers, Jan J. Koenderink

^*Corresponding author for this work

Research output: Contribution to Journal › Article › Academic › peer-review

Abstract

We report on the ability of human observers to discriminate local second-order shape of quadratic stereo-defined surfaces. Local second-order shape can be specified by two parameters: the curvedness (a scale-dependent quantity describing overall curvature of a shape) and the shape index (a scale-independent quantity describing the shape's appearance). We measured shape index discrimination thresholds of shapes subject to attitude and curvedness transformations. Results show that neither slant nor curvedness manipulations affect or bias observers' judgements of surface shape. Furthermore, ideal detector simulations show that observers do not perform optimally: they do not exploit all available information.

Original language	English
Pages (from-to)	2409-2423
Number of pages	15
Journal	Vision Research
Volume	34
Issue number	18
DOIs	https://doi.org/10.1016/0042-6989(94)90285-2
Publication status	Published - 1994

Keywords

Disparity curvature
Shape discrimination
Slant
Stereopsis
Surface curvature

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/0042-6989(94)90285-2

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title = "Influence of surface attitude and curvature scaling on discrimination of binocularly presented curved surfaces",

abstract = "We report on the ability of human observers to discriminate local second-order shape of quadratic stereo-defined surfaces. Local second-order shape can be specified by two parameters: the curvedness (a scale-dependent quantity describing overall curvature of a shape) and the shape index (a scale-independent quantity describing the shape's appearance). We measured shape index discrimination thresholds of shapes subject to attitude and curvedness transformations. Results show that neither slant nor curvedness manipulations affect or bias observers' judgements of surface shape. Furthermore, ideal detector simulations show that observers do not perform optimally: they do not exploit all available information.",

keywords = "Disparity curvature, Shape discrimination, Slant, Stereopsis, Surface curvature",

author = "{De Vries}, {Sjoerd C.} and Kappers, {Astrid M L} and Koenderink, {Jan J.}",

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doi = "10.1016/0042-6989(94)90285-2",

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AU - De Vries, Sjoerd C.

AU - Kappers, Astrid M L

AU - Koenderink, Jan J.

PY - 1994

Y1 - 1994

N2 - We report on the ability of human observers to discriminate local second-order shape of quadratic stereo-defined surfaces. Local second-order shape can be specified by two parameters: the curvedness (a scale-dependent quantity describing overall curvature of a shape) and the shape index (a scale-independent quantity describing the shape's appearance). We measured shape index discrimination thresholds of shapes subject to attitude and curvedness transformations. Results show that neither slant nor curvedness manipulations affect or bias observers' judgements of surface shape. Furthermore, ideal detector simulations show that observers do not perform optimally: they do not exploit all available information.

AB - We report on the ability of human observers to discriminate local second-order shape of quadratic stereo-defined surfaces. Local second-order shape can be specified by two parameters: the curvedness (a scale-dependent quantity describing overall curvature of a shape) and the shape index (a scale-independent quantity describing the shape's appearance). We measured shape index discrimination thresholds of shapes subject to attitude and curvedness transformations. Results show that neither slant nor curvedness manipulations affect or bias observers' judgements of surface shape. Furthermore, ideal detector simulations show that observers do not perform optimally: they do not exploit all available information.

KW - Disparity curvature

KW - Shape discrimination

KW - Slant

KW - Stereopsis

KW - Surface curvature

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SN - 0042-6989

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EP - 2423

JO - Vision Research

JF - Vision Research

IS - 18

ER -

Influence of surface attitude and curvature scaling on discrimination of binocularly presented curved surfaces

Abstract

Keywords

UN SDGs

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