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A television/computer three-dimensional surface shape measurement system.

A R Turner-Smith1

  • 1Oxford Orthopaedic Engineering Centre, University of Oxford, U.K.

Journal of Biomechanics
|January 1, 1988
PubMed
Summary
This summary is machine-generated.

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This study introduces an optical scanner for measuring human back shape. The system uses a projector and camera to capture 3D coordinates, achieving high accuracy for surface shape analysis.

Area of Science:

  • Biomedical Engineering
  • Computer Vision
  • Medical Imaging

Background:

  • Accurate measurement of human back shape is crucial for clinical assessment and ergonomic design.
  • Existing methods may lack precision or efficiency for dynamic shape capture.

Purpose of the Study:

  • To develop and validate a novel optical scanner for precise human back shape measurement.
  • To create an efficient system for capturing 3D surface coordinates of the human back.

Main Methods:

  • A projector and television camera system, mounted on a rotating axis, was utilized.
  • A horizontal light plane was projected and viewed by the camera, linked to a minicomputer for 3D coordinate calculation.
  • Algorithms were developed for system calibration, data processing, and feature detection.

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Main Results:

  • The optical scanner successfully captured human back surface shapes within approximately 2 seconds.
  • Measurement accuracy exceeded the design goal of +/- 3 mm in each axis within a 400x500x300 mm volume.
  • The system demonstrated effective calibration and accurate detection of surface features and markers.

Conclusions:

  • The developed optical scanner provides a precise and efficient tool for human back shape measurement.
  • This technology has potential applications in clinical diagnostics, posture analysis, and custom orthotic design.
  • The system's accuracy and speed meet the requirements for detailed biomechanical and ergonomic studies.