通过弦高差法对采集的轮廓数据进行异常值的判断与剔除，一维高斯滤波进行滤波，角度-弦高联合准则法进行数据精简，并通过数据验证。(The string height difference method is used to judge and eliminate the abnormal value of the collected contour data, the one-dimensional Gauss filter is filtered, the angle string height method is used to simplify the data, and the data is verified by the data.)