Abstract：In order to measure the top and bottom conductor line widths, a fast and accurate edge extraction method is proposed. Common methods of image denoising often lead to blurred edges, especially for heavy-noise contaminated microscopic images. Firstly, P-M model is used to remove noise. This technique can preserves or even enhance prominent edges when removing noise. Canny operator is used to detect the edge in the denoised image. At last, Hough transform is used to detect lines. Experimental results show that the proposed method has strong antinoise capability. The accuracy of line widths measurement is improved. It can be applied to practical engineering measurement system.
黄永林,叶玉堂,陈镇龙,乔闹生. PCB导线上下线宽检测算法研究[J]. 计量学报, 2011, 32(3): 217-220.
HUANG Yong-lin,YE Yu-tang,CHEN Zhen-long,QIAO Nao-sheng. Study on Algorithms of PCB Conductor Top and Bottom Line Widths Measurement. Acta Metrologica Sinica, 2011, 32(3): 217-220.
［1］Illingworth J, Kittler J. A survey of the Hough transform［J］. Computer Vision, Graphics, and Image Processing, 1988, 44(1):87-107.
［2］腾今朝, 邱杰. 利用Hough变换实现直线的快速精确检测［J］. 中国图象图形学报,2008,13(2): 234-237.
［3］Shapiro L G, Stockman G C. 计算机视觉［M］. 赵清洁译.北京:机械工业出版社,2005,224-230.
［4］吴凤和. 基于计算机视觉测量技术的图像轮廓提取方法研究［J］. 计量学报,2007,28(1): 18-22.
［5］张洪涛,段发阶,叶声华. 一种快速亚像素边缘检测方法研究［J］. 计量学报,2002,23(4): 263-265.
［6］Perona P, Malik J. Scale-space and edge detection using anisotropic diffusion［J］. IEEE Trans Pat Anal Machine Intel, 1990, 12（7）: 629-639.
［7］Wei G W. Generalized Perona-Malik equation for Image Restoration［J］. IEEE Signal Processing, 1999,6(7): 165-167.
［8］Canny J A.Computational approach to edge detection［J］.IEEE Trans On PAMI, 1986, 8(6):679-698.
［9］万力,易昂,傅明. 一种基于Canny算法的边缘提取改善方法［J］. 计算机技术与自动化,2003, 22(1):24-26.
［10］姚敏. 数字图像处理［M］. 北京:机械工业出版社,2006,225-230.
2011, Vol. 32 
