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Related Experiment Videos

Is visual image segmentation a bottom-up or an interactive process?

S P Vecera1, M J Farah

  • 1Department of Psychology, University of Utah, Salt Lake City 84112, USA. shaun.vecera@m.cc.utah.edu

Perception & Psychophysics
|December 24, 1997
PubMed
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Visual image segmentation, the process of grouping visual features, is influenced by stimulus familiarity. Familiar shapes, like upright letters, facilitate faster segmentation compared to rotated ones, suggesting an interactive process.

Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Computer Vision

Background:

  • Visual image segmentation groups visual features belonging to a single shape.
  • The debate exists whether segmentation is a bottom-up or interactive process.

Purpose of the Study:

  • To investigate whether visual image segmentation is a bottom-up or interactive process.
  • To determine the influence of stimulus familiarity and top-down support on image segmentation.

Main Methods:

  • Four experiments were conducted using overlapping shapes and probed locations.
  • Top-down support was manipulated using upright versus rotated letters.
  • Response times for same/different shape judgments were measured.

Main Results:

Related Experiment Videos

  • Subjects responded fastest when shapes corresponded to familiar, upright letters.
  • Familiarity, not just recognition speed, influenced segmentation.
  • Results ruled out segmentation after recognition and faster recognition of upright letters.

Conclusions:

  • Visual image segmentation is an interactive process influenced by stimulus familiarity.
  • Top-down support plays a significant role in grouping visual features.
  • Findings support an interactive model of visual image segmentation.