目前广泛采用最大曲率方法实现指纹中心定位，但在指纹中心缺失情况下，该方法定位并不准确。
To realize center point positioning of fingerprint, method of maximum curvature is widely used at present. But it is inaccurate when the center region of fingerprint has been lost or not clear.
在文中，分别讨论了拉普拉斯平滑及其改进算法、平均曲率流、PDE方法及基于方向的平滑算法。
In this paper, we discuss Laplacian smoothing and modified methods, mean curvature flow, PDE method and the smoothing method based on directions.
介绍了我们所采用的一些曲面分析方法，包括曲面的曲率分析和曲面深度分析，并应用于颅骨面貌复原项目中的曲面造型。
The thesis tells surface analysis method including curvature analysis and curve depth analysis that we using in the skin restoring project.
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