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Rotation and direction judgment from visual images head-slaved in two and three degrees-of-freedom.

B D Adelstein1, S R Ellis

  • 1NASA-ARC, Moffet Field, CA 94035, USA. bda@eos.arc.nasa.gov

IEEE Transactions on Systems, Man, and Cybernetics. Part A, Systems and Humans : a Publication of the IEEE Systems, Man, and Cybernetics Society
|December 1, 2001
PubMed
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Adding a roll degree-of-freedom (DOF) to telepresence cameras improved rotation judgment at extreme angles but did not affect direction sensing. Azimuth overshoot persisted, explained by eye-head gaze models.

Area of Science:

  • Human-Computer Interaction
  • Robotics
  • Virtual Reality

Background:

  • Telepresence systems enhance remote interaction.
  • Spatial awareness is crucial for effective teleoperation.
  • Camera control degrees-of-freedom (DOF) impact user perception.

Purpose of the Study:

  • To investigate the impact of adding a roll DOF to telepresence camera yaw and pitch on spatial awareness.
  • To determine if roll DOF affects the judgment of direction and rotation in a remote scene.

Main Methods:

  • An experiment was conducted with subjects viewing a remote scene via a head-mounted display with head-slaved camera images.
  • Subjects judged the direction and rotation of stationary target markers.
  • The roll DOF was systematically eliminated and its effect on judgment was analyzed.
Keywords:
NASA Center ARCNASA Discipline Space Human Factors

Related Experiment Videos

Main Results:

  • Elimination of the roll DOF significantly affected rotation judgment, particularly at extreme yaw and pitch combinations.
  • Azimuth and elevation judgments were not affected by the presence or absence of the roll DOF.
  • A consistent azimuth overshoot was observed irrespective of the roll condition.

Conclusions:

  • The roll degree-of-freedom (DOF) contributes to accurate rotation perception in telepresence, especially under challenging camera angles.
  • Spatial awareness related to direction (azimuth and elevation) is less dependent on camera roll.
  • Kinematic models of eye-head gaze accurately explain observed rotation misjudgments.