基于法矢量低通滤波的三维数据等值面平滑显示

在以前的三维显示研究中，采用表面矢量平滑的方法对三维重建后的数据显示取得了较好的效果，但也产生了表面特征和特征角等有用信息丢失的问题。现通过把表面法矢量视为离散矢量信号，引入信号处理中滤波器的方法平滑表面法矢量。相对于三维表面数据场的平滑，不仅平滑迭代次数更少，而且更好地保留了有用的表面特征信息。

ISOSURFACE SMOOTHING DISPLAY OF 3D DATA BY-LOW PASS FILTERING OF THE SURFACE VECTOR

In former study of 3D data display, surface vector smoothing method is adopted in isosurface smoothing. It gives a good display performance, but some useful surface features and small feature angles are eliminated at the same time. In this paper, the signal processing methods were introduced to improve the effect of display by regarding surface vectors as discrete vector signals and implementing low pass filtering on them. Not only the number of smoothing iteration is reduced dramatically, but also useful surface features and angles are better reserved.