Probing intermediate stages of shape processing

Research output: Contribution to journalArticle

Abstract

The visual system provides a representation of what and where objects are. This entails parsing the visual scene into distinct objects. Initially, the visual system encodes information locally. While interactions between adjacent cells can explain how local fragments of an object’s contour are extracted from a scene, such computations are ill suited to capture extended objects. This article reviews some of the evidence in favor of intermediate- level computations, tuned to the shape of an object, in the transformation from discrete local sampling to representation of complex objects. Two main paradigms, employed to study how information about the position and orientation of local signals are combined at intermediate levels, are considered here: a shape detection task (measuring the number of signal elements required to detect a shape in noise) and a shape discrimination task (requiring observers to discriminate between shapes).
Original languageEnglish
Pages (from-to)1-19
Number of pages19
JournalJournal of Vision
Volume15
Issue number7
DOIs
Publication statusPublished - May 2015

Keywords

  • shape processing
  • vision sciences
  • shape detection

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