摘要
对线阵CCD图像边缘检测的直接直线拟合法和基于梯度算子直线拟合法进行了比较研究。利用线阵CCD对线材目标进行宽度测量,并分别用两种方法对采集目标图像进行边缘位置检测。经检测得到,直接直线拟合法和基于梯度算子直线拟合法的检测精度分别为0.579%和0.039%,标准差分别为0.037mm和0.169mm。结果表明,直接直线拟合法精度较低,但稳定性较好;基于梯度算子直线拟合法精度较高,但结果容易受到随机噪声的影响。
Least squares linear fitting method can be divided into two kinds：the direct linear fitting method and the linear fitting method based on the gradient operator.Principles of both methods were compared,and the results were validated by the experiments using the linear CCD to measure the width of the wire rod.The results of the experiment show that the precision of the direct linear fitting method is 0.579%and the standard deviation is 0.037 mm,and the precision of the linear fitting method based on the gradient operator is 0.039%and the standard deviation is 0.169 mm.Results of the experiment shows that the direct linear fitting method has better stability and larger error while the result of the linear fitting method based on the gradient operator is sensitive to the random noise but it is much more accurate.
出处
《光学仪器》
2015年第3期268-271,277,共5页
Optical Instruments
