基于曲率特性的牙齿三维模型匹配方法研究

Computer Engineering and Design(2013)

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Abstract
为提高无标志点情况下牙齿锥形束CT与蓝光扫描三维模型匹配精度,提出了依据曲率特性选取对应点集的匹配方法。取基准模型中三点为基准点,以各基准点的曲率值为特征评价标准,提取出待匹配模型中与基准点曲率值相近似的点作为特征点;通过约束条件,从特征点中进一步选取出与基准点对应的匹配点;利用三点平移变换法计算旋转矩阵R及平移矢量t,从而实现基准模型与匹配模型的初匹配。通过实例仿真验证了所提算法的准确性和有效性。
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Key words
rebuild topology,3d scanning model,curvature,feature point extraction,three dimensional model match
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