Examining edge- and region-based texture analysis mechanisms

S. Sabina Wolfson, Michael S. Landy

Research output: Contribution to journalArticle

Abstract

Instantaneous texture discrimination performance was examined for different texture stimuli to uncover the use of edge-based and region-based texture analysis mechanisms. Textures were composed of randomly placed, short, oriented line segments. Line segment orientation was chosen randomly using a Gaussian distribution (described by a mean and a standard deviation). One such distribution determined the orientations on the left side of the image, and a second distribution was used for the right side. The two textures either abutted to form an edge or were separated by a blank region. A texture difference in mean orientation led to superior discrimination performance when the textures abutted. On the other hand, when the textures differed in the standard deviation of the orientation distribution, performance was similar in the two conditions. These results suggest that edge-based texture analysis mechanisms were used (i.e. were the most sensitive) in the abutting difference-in-mean case, but region-based texture analysis mechanisms were used in the other three cases.

Original languageEnglish (US)
Pages (from-to)439-446
Number of pages8
JournalVision research
Volume38
Issue number3
DOIs
StatePublished - Feb 1 1998

Keywords

  • Edge
  • Region
  • Segmentation
  • Segregation
  • Texture

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems

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