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A three-dimensional measuring system for the human face using three-directional photography.

M Motoyoshi1, S Namura, H Y Arai

  • 1Department of Orthodontics, Nihon University School of Dentistry, Tokyo, Japan.

American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics
|May 1, 1992
PubMed
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This study developed a precise 3D facial measurement system using PCs and scanners for clinical use. The system achieves high accuracy, suitable for applications like orthognathic surgery planning and evaluation.

Area of Science:

  • Medical Imaging
  • Biomedical Engineering
  • Computer-Aided Surgery

Background:

  • Accurate 3D facial anthropometry is crucial for clinical applications, including orthognathic surgery.
  • Existing methods may lack precision or require complex operations.

Purpose of the Study:

  • To develop a high-precision, user-friendly 3D facial measurement system for clinical use.
  • To validate the accuracy of the developed system.

Main Methods:

  • Utilized a personal computer and image scanner to capture 2D facial coordinates.
  • Developed algorithms to calculate 3D coordinates from 2D data.
  • Validated system accuracy using a plaster cast and comparison with a contact 3D system.

Main Results:

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  • The system automatically measures hundreds of facial grid points.
  • Demonstrated clinical applicability through an orthognathic surgery case visualization.
  • Achieved high accuracy with mean errors (SD) of 0.04±0.24 mm (X), 0.03±0.16 mm (Y), and 0.08±0.23 mm (Z).

Conclusions:

  • The developed 3D facial measurement system offers high precision and ease of use.
  • The system's accuracy is sufficient for clinical applications, particularly in facial analysis and surgical planning.