Digital three-dimensional photogrammetry: Evaluation of anthropometric precision and accuracy using a Genex 3D camera system
Digital three-dimensional photogrammetry: Evaluation of anthropometric precision and accuracy using a Genex 3D camera system
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DOI：
10.1597/03-066.1
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发表时间：
2004-09-01
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影响因子：
--
通讯作者：
Marazita, ML
中科院分区：
文献类型：
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作者：
Weinberg, SM;Scott, NM;Marazita, ML
目的：探讨数字三维摄影测量法测量面部人体尺寸的精度和准确性。设计：由两名独立观察者使用卡尺和3D照片（用Genex 3D相机系统获得）对20名受试者重复获得19个标准颅面测量值，包括标记和不标记面部标志。然后计算了四种不同的精度估计值，并对不同技术进行了统计比较。此外，将3D照片的平均测量值与直接人体测量值进行统计比较。结果：在测量精度方面，三维照片明显优于直接人体测量。在几乎所有情况下，标记了地标的3D照片具有最高的整体精度。此外，无论采用何种方法，在测量之前标记地标都可以提高精度。从三维照片和直接人体测量中得出的平均值之间观察到良好的一致性。7项测量结果有统计学显著差异；然而，这些差异的大小通常在临床上不显著（< 2mm）。结论：使用Genex相机系统的数字3D摄影测量足够精确，可以满足大多数医学和颅面研究设计的人体测量需求。
Objective: To determine the precision and accuracy of facial anthropometric measurements obtained through digital three-dimensional (3D) photogrammetry.Design: Nineteen standard craniofacial measurements were repeatedly obtained on 20 subjects by two independent observers, using calipers and 3D photos (obtained with a Genex 3D camera system), both with and without facial landmarks labeled. Four different precision estimates were then calculated and compared statistically across techniques. In addition, mean measurements from 3D photos were compared statistically with those from direct anthropometry.Results: In terms of measurement precision, the 3D photos were clearly better than direct anthropometry. In almost all cases, the 3D photo with landmarks labeled had the highest overall precision. In addition, labeling landmarks prior to taking measurements improved precision, regardless of method. Good congruence was observed between means derived from the 3D photos and direct anthropometry. Statistically significant differences were noted for seven measurements; however, the magnitude of these differences was often clinically insignificant (< 2 mm).Conclusions: Digital 3D photogrammetry with the Genex camera system is sufficiently precise and accurate for the anthropometric needs of most medical and craniofacial research designs.