Registration of 3-D head surfaces using multiple landmarks
Registration of 3-D head surfaces using multiple landmarks
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DOI：
10.1109/42.241879
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发表时间：
1993
影响因子：
10.6
通讯作者：
W. R. Fright;A. Linney
中科院分区：
文献类型：
--
作者：
W. R. Fright;A. Linney
描述了一种基于牛顿法的数学过程，其使得能够相对于空间位置、取向以及可选地三维尺度来配准或归一化表面测量。要求操作员在待配准表面的计算机图形图像上识别同源标志。在该应用中，在该方法用于测量面部形状的变化的情况下，这些界标被限制到在待配准的表面之间保持不变的表面的部分。在最小二乘意义上，最小化标记配准中的误差;因此，多个标记有利于最小化测量系统和操作员产生的个体误差的影响。使用的光学表面扫描仪和传统的X射线计算机断层扫描仪的头部测量的例子。
A mathematical procedure based on Newton's method is described that enables surface measurements to be registered, or normalized, with respect to spatial position, orientation, and, optionally, scale in three dimensions. An operator is required to identify homologous landmarks on the computer graphics images of surfaces to be registered. In this application, where the method is used to measure changes in facial shape, these landmarks are restricted to parts of the surface that have remained unchanged between the surfaces to be registered. Error in the registration of landmarks is minimized in a least-squares sense; hence multiple landmarks are favored to minimize the effect of individual errors produced by the measuring system and the operator. Examples are presented using measurements of the head taken with an optical surface scanner and a conventional X-ray computed tomography scanner.