基于双边过滤的网格光顺法

在逆向工程和计算机图形学中,由于扫描的数据存在噪点,为了便于后期处理,在使用前要对其进行光顺处理.通过对网格双边过滤法的研究,提出了改进的方法.通过网格顶点及其邻域点拟合一张曲面,对每一个邻域点构造一条抛物线,利用该抛物线计算出新的距离,得到新的光顺公式.经过软件测试,新的光顺公式能够更好的对网格进行光顺,同时保留网格图形的特征.实验结果证明,使用拟合的曲面来局部逼近已有的未知曲面能比使用平面逼近已有的未知曲面得到更好的保特征效果.

Mesh smoothing method based on bilateral filtering

In the reverse engineering and computer graphics, the scanned data often contains noise, and the noise should be removed before using the scanned data for post-processing. Based on the research of the bilateral mesh smoothing, the modified method is given first by fitting a surface with the mesh vertex and its neighboring vertices, then constructing a parabola for every neighboring vertex and computing the new distance by the parabola. The new weighted distance gives the new formula. Through the software testing, the new formula can smooth the mesh better and preserve features better than the original. The result is that using surface to approximate the original unknown surface locally has a better effect than using plane.