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Evaluation of a CCD-based facial measurement system
A T Deacon1, A G Anthony, S N Bhatia
1Thorn EMI Research, Hayes, Middlesex, UK.
Medical Informatics = Medecine Et Informatique
|April 1, 1991
Summary
This study presents a new CCD-based biostereometric system for fast, accurate 3D facial soft-tissue measurement. The de-skilled system achieves 0.5 mm accuracy, simplifying orthodontic assessments.
Area of Science:
- Biostereometrics
- Medical Imaging
- Orthodontics
Background:
- Traditional photogrammetry requires extensive training.
- Accurate 3D soft-tissue measurement is crucial in orthodontics.
- Existing methods can be time-consuming and complex.
Purpose of the Study:
- To describe the configuration and evaluation of a novel CCD-based biostereometric system.
- To enable rapid and accurate 3D measurement of facial soft-tissue.
- To minimize the need for specialized photogrammetric training.
Main Methods:
- Development of a CCD-based biostereometric system.
- Automatic camera calibration and stereo matching on a Sun Microsystems workstation.
- Non-contact 3D data acquisition and off-line processing.
Main Results:
- The system provides non-contact 3D measurement of soft-tissue.
- It requires minimal photogrammetric training (de-skilled).
- Surface measurement accuracy is within 0.5 mm, validated against a precision electromechanical device.
Conclusions:
- The CCD-based biostereometric system offers a rapid, accurate, and accessible solution for facial soft-tissue analysis.
- The system simplifies complex photogrammetric procedures for orthodontic applications.
- The achieved accuracy meets and exceeds requirements for clinical use.