Recognizing faces defined by texture gradients

Authors: Liu, C.H., Collin, C.A., Farivar, R. and Chaudhuri, A.

Journal: Perception and Psychophysics

Volume: 67

Issue: 1

Pages: 158-167

ISSN: 0031-5117

DOI: 10.3758/BF03195019

Abstract:

Texture gradients can reveal surface orientation in a manner similar to shape from shading, and therefore provide an important cue for object recognition. In this study, we tested whether a complex 3-D object, such as a face, can be identified from texture gradients alone. The stimuli were laser-scanned faces for which the texture element was a fractal-noise pattern mapped onto the 3-D surface. An eight-alternative forced choice task was used in which participants matched a face defined by texture gradients to one of eight faces defined by shape from shading (Experiment 1) or by texture gradients (Experiment 2). On average, participants scored 24% and 18%, respectively, above chance in these experiments. Although this performance was much poorer than the performance based entirely on shape-from-shading stimuli (Experiment 3), the results suggest that texture gradient information may be used to recover surface geometry of complex objects. Copyright 2005 Psychonomic Society, Inc.

Source: Scopus

Recognizing faces defined by texture gradients.

Authors: Liu, C.H., Collin, C.A., Farivar, R. and Chaudhuri, A.

Journal: Percept Psychophys

Volume: 67

Issue: 1

Pages: 158-167

ISSN: 0031-5117

DOI: 10.3758/bf03195019

Abstract:

Texture gradients can reveal surface orientation in a manner similar to shape from shading, and therefore provide an important cue for object recognition. In this study, we tested whether a complex 3-D object, such as a face, can be identified from texture gradients alone. The stimuli were laser-scanned faces for which the texture element was a fractal-noise pattern mapped onto the 3-D surface. An eight-alternative forced choice task was used in which participants matched a face defined by texture gradients to one of eight faces defined by shape from shading (Experiment 1) or by texture gradients (Experiment 2). On average, participants scored 24% and 18%, respectively, above chance in these experiments. Although this performance was much poorer than the performance based entirely on shape-from-shading stimuli (Experiment 3), the results suggest that texture gradient information may be used to recover surface geometry of complex objects.

Source: PubMed

Preferred by: Changhong Liu

Recognizing faces defined by texture gradients

Authors: Liu, C.H., Collin, C.A., Farivar, R. and Chaudhuri, A.

Journal: PERCEPTION & PSYCHOPHYSICS

Volume: 67

Issue: 1

Pages: 158-167

ISSN: 0031-5117

DOI: 10.3758/BF03195019

Source: Web of Science (Lite)

Recognizing faces defined by texture gradients.

Authors: Liu, C.H., Collin, C.A., Farivar, R. and Chaudhuri, A.

Journal: Perception & psychophysics

Volume: 67

Issue: 1

Pages: 158-167

eISSN: 1532-5962

ISSN: 0031-5117

DOI: 10.3758/bf03195019

Abstract:

Texture gradients can reveal surface orientation in a manner similar to shape from shading, and therefore provide an important cue for object recognition. In this study, we tested whether a complex 3-D object, such as a face, can be identified from texture gradients alone. The stimuli were laser-scanned faces for which the texture element was a fractal-noise pattern mapped onto the 3-D surface. An eight-alternative forced choice task was used in which participants matched a face defined by texture gradients to one of eight faces defined by shape from shading (Experiment 1) or by texture gradients (Experiment 2). On average, participants scored 24% and 18%, respectively, above chance in these experiments. Although this performance was much poorer than the performance based entirely on shape-from-shading stimuli (Experiment 3), the results suggest that texture gradient information may be used to recover surface geometry of complex objects.

Source: Europe PubMed Central

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