摘要
针对一般数字化曲线拟合方法的不足,提出了利用整体最小二乘平差计算数字化曲线的参数。本文以直线拟合为例,在参数平差中,将数字化曲线的X坐标和Y坐标均看作观测值,采用整体最小二乘平差法进行平差和精度评定。算例结果说明整体最小二乘平差法拟合直线方程精度更高。
For improving shortcoming of fitting methods for the digitized curve, this paper applies the total least squares adjustment method to calculate parameters of digitized curves. To the line fitting as an example, X and Y coordinates of the digitized curve are observations, and using the total least squares method to adjust and evaluate accuracy of parameters. The calculation results show that the method has the capability to increase the accuracy of parameters estimated.
出处
《工程勘察》
2013年第8期71-73,共3页
Geotechnical Investigation & Surveying
基金
内蒙古科技大学创新基金项目(项目批准号:2012NCL013)
关键词
数字化曲线
整体最小二乘
最小二乘
直线拟合
参数平差
digitized curve
total least squares
least squares
line fitting
parameter adjustment