English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Evidence for patchwork approximation of shape primitives.

Vuong, Q., Domini, F., & Caudek, C. (2004). Evidence for patchwork approximation of shape primitives. Perception Psychophysics, 66(7), 1246-1259.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-DA5F-F Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-DA60-9
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Vuong, QC1, Author              
Domini, F, Author
Caudek, C, Author
Affiliations:
1Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497797              

Content

show
hide
Free keywords: -
 Abstract: Investigators have proposed that qualitative shapes are the primitive information of spatial vision: They preserve an approximately one-to-one mapping between surfaces, images, and perception. Given their importance, we examined how the visual system recovers these primitives from sparse disparity fields that do not provide sufficient information for their recovery. We hypothesized that the visual system interpolates sparse disparities with planes, resulting in a patchwork approximation of the implicitly defined shapes. We presented observers with stereo displays simulating planar or smooth curved surfaces having different curvatures. The observers‘ task was to detect whether dots deviated from these surfaces or to discriminate planar from curved or planar from scrambled surfaces. Consistent with our hypothesis, increasing curvature had detrimental effects on observers‘ performance (Experiments 1-3). Importantly, this patchwork approximation leads to the recovery of t he proposed shape primitives, since observers were more accurate at discriminating planar-from-curved than planar-from-scrambled surfaces with matched disparity range (Experiment 4).

Details

show
hide
Language(s):
 Dates: 2004
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: BibTex Citekey: 2388
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Perception Psychophysics
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 66 (7) Sequence Number: - Start / End Page: 1246 - 1259 Identifier: -