反求工程中一种数据平滑的方法

A Method of Data Smoothing of Reverse Engineering

逆向工程中测量获得的点云数据中存在一定的噪声点,必须对其进行数据平滑处理.在比较弦高比阈值滤波、均值滤波和中值滤波的基础上,提出一种数据平滑的方法.该方法充分利用数据点间的相关性和位置信息,对数据点和噪声点采取不同的处理方式,避免了噪声的传播.实验研究表明,该方法既能较好地滤除噪声点又有较好的保边性.

The noise in point cloud data acquired through measuring in reverse engineering has to be eliminated through data smoothing. This paper introduces a new data smoothing method based on the comparison among chord height ratio threshold filtering, average filtering and median filtering. The correlation and relative location between data point is made the best use of, and data point and noise point is treated with different way, through which noise transmission is avoided. The experiment verifies boundary - protecting and the effect of the new method to eliminate noise point.