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Holistic Facial Composite Creation and Subsequent Video Line-up Eyewitness Identification Paradigm
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Published on: December 24, 2015

Face recognition: Are viewpoint and identity processed after face detection?

Charles C-F Or1, Hugh R Wilson

  • 1Centre for Vision Research, York University, Toronto, Ontario, Canada M3J 1P3. cfor@yorku.ca

Vision Research
|May 25, 2010
PubMed
Summary
This summary is machine-generated.

Face detection occurs rapidly, but recognizing specific face views and identities requires additional processing time. This study reveals that extracting facial details like viewpoint and identity is a sequential process following initial face detection.

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Area of Science:

  • Cognitive Neuroscience
  • Visual Perception
  • Human Face Recognition

Background:

  • Previous research indicates object category retrieval coincides with detection.
  • The temporal dynamics of face-specific processing remain less understood.

Purpose of the Study:

  • To investigate if face views and identities are processed as categories.
  • To determine the time course of face detection, viewpoint recognition, and identity identification.

Main Methods:

  • Utilized the method of constant stimuli and a two-alternative forced-choice (2AFC) paradigm.
  • Varied stimulus durations (13–133 ms) to estimate discrimination thresholds.
  • Measured behavioral performance across face detection, viewpoint recognition, and face identification tasks.

Main Results:

  • Face detection thresholds were significantly shorter (24–31 ms) than viewpoint recognition and face identification.
  • Threshold durations for viewpoint recognition and face identification were comparable.
  • Face view and identity are retrieved subsequent to initial face detection.

Conclusions:

  • Face detection is a rapid process.
  • Viewpoint and identity extraction require additional, time-consuming processing.
  • Categorical analysis of face views is essential for detailed facial recognition, occurring after basic detection.