Visual Processing in Texture Segregation

Abstract

Experiments were conducted further investigating the role of both spatial frequency channels and grouping mechanisms in texture segregation. Patterns were constructed in which differences in the outputs of Gabor filters fail to account for the perceived segregation. Perceived segregation is, however, predicted by the outputs of DOG filters. The results suggest that there are at least two primitives for texture segregation: Changes in the orientations of a stimulus in which the slopes of the component features do not change, e.g., a 180 degree rotation of a stimulus, yields stronger segregation with a 3D figure than with a 2D figure. We hypothesize that the segregation differences are due to grouping processes. A 3D representation makes explicit the orientations of object surfaces enabling grouping of 3D figures by the similarity of their surface orientations, e.g., the directions of their surface normals.

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Document Details

Document Type
Technical Report
Publication Date
Dec 18, 1990
Accession Number
ADA230489

Entities

People

  • Jacob Beck

Organizations

  • University of Oregon

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Materials and Manufacturing Processes
  • Space

DTIC Thesaurus Topics

  • Biological Sciences
  • Computer Vision
  • Frequency
  • Identification
  • Image Processing
  • Image Recognition
  • Orientation (Direction)
  • Parallel Computing
  • Parallel Processing
  • Perception
  • Psychology
  • Recognition
  • Security
  • Signal Processing
  • Statistics
  • Three Dimensional
  • Two Dimensional

Fields of Study

  • Psychology

Readers

  • Artificial Intelligence
  • Vision Science/Vision Psychology/Cognitive Neuroscience.