Wilson I, Snape L, Fright R, Nixon M
Department of Oral Medicine and Oral Surgery, Christchurch School of Medicine.
N Z Dent J. 1997 Dec;93(414):110-3.
This paper describes a laser scanning technique to measure accurately changes in facial volume. Three potential sources of error were identified: the registration algorithm, the inherent accuracy of the scanner, and the natural minute-to-minute variability of the human face. In experiments performed to discover the relative magnitude and significance of each source of error, the performance of the registration algorithm was found to be limited by the accuracy of the data, being 1.6 cc, on average, measured over the entire face of a plaster model. Scan-to-scan variability in the shape of the human face was measured at 3.3 cc on average. We conclude that laser scanning is a simple, non-invasive, accurate, and reproducible means of assessing changes in facial volume.
本文描述了一种用于精确测量面部容积变化的激光扫描技术。识别出了三个潜在误差源：配准算法、扫描仪的固有精度以及人脸自然的每分钟变化。在为发现每个误差源的相对大小和重要性而进行的实验中，发现配准算法的性能受数据精度限制，在石膏模型的整个面部上平均测量误差为1.6立方厘米。人脸形状的逐次扫描变化平均测量为3.3立方厘米。我们得出结论，激光扫描是一种评估面部容积变化的简单、非侵入性、准确且可重复的方法。
