液晶与显示2016，Vol.31Issue(8)：818-824,7.DOI:10.3788/YJYXS20163108.0818
基于 FPGA 的光条中心线实时提取方法
Real-time extraction of light centerlines based on FPGA
摘要
Abstract
With the popularization of high-speed rail,the screw loosening,body deformation and other safety issues gradually attract people′s attention,and how to check the rail body is the research field. Using laser 3-dimension measurement model,when the line structure light scans high-speed rail body,it can estimate whether high-speed rail safety hazards exist according to the degree of distortion of the laser stripe.How to quickly and accurately extract the center line of the laser stripe has become the primary problem.Based on the consideration of the factors,such as the selection of the light source,the environmental noise,and the reflection of the measured object,first,we use median filter to remove the noise as pre process,and then target area and background are segmented by OTSU;fi-nally,we use improved gray barycenter method to extract the center line of target area.In this paper the image is 1 024 pixel × 200 pixel in FPGA,the experience shows that extraction time of center line is less than 0.97 ms.The algorithm can satisfy the requirements of high-speed rail detection system for light centerline extraction of real-time as well as high precision.关键词
中值滤波/最大类间方差法/灰度重心法/FPGAKey words
median filter/OTSU/gray barycenter method/FPGA分类
信息技术与安全科学引用本文复制引用
曲岳,刘艳滢,王延杰,张雷..基于 FPGA 的光条中心线实时提取方法[J].液晶与显示,2016,31(8):818-824,7.基金项目
国家863高技术研究发展计划(No．2015AA703101013) Supported by National High Technology Research and Development Program of China (No．2015AA703101013) （No．2015AA703101013）
