计算机工程与设计
計算機工程與設計
계산궤공정여설계
COMPUTER ENGINEERING AND DESIGN
2010年
1期
225-227
,共3页
图像检测%测量精度%亚像素边缘%Hough变换%多孔零件
圖像檢測%測量精度%亞像素邊緣%Hough變換%多孔零件
도상검측%측량정도%아상소변연%Hough변환%다공령건
imaging detection%measurement accuracy%sub-pixel edge%Hough transform%porous parts
为了提高工业零件检测效率和测量精度,研究了基于图像检测技术的多孔零件二维几何量的测量问题.先对CCD获取的零件图像进行分析处理以改善图像的可识别性,采用基于二次曲线拟合的快速亚像素边缘定位算法快速提取零件的精确边缘,从而提高系统的测量精度,并运用Hough变换计算被测零件的几何参数.实测结果表明,该系统的测量精度和准确度高,边缘定位精度达0.1 pixel,检测精度达101μm,最大相对误差为0.4%.
為瞭提高工業零件檢測效率和測量精度,研究瞭基于圖像檢測技術的多孔零件二維幾何量的測量問題.先對CCD穫取的零件圖像進行分析處理以改善圖像的可識彆性,採用基于二次麯線擬閤的快速亞像素邊緣定位算法快速提取零件的精確邊緣,從而提高繫統的測量精度,併運用Hough變換計算被測零件的幾何參數.實測結果錶明,該繫統的測量精度和準確度高,邊緣定位精度達0.1 pixel,檢測精度達101μm,最大相對誤差為0.4%.
위료제고공업령건검측효솔화측량정도,연구료기우도상검측기술적다공령건이유궤하량적측량문제.선대CCD획취적령건도상진행분석처리이개선도상적가식별성,채용기우이차곡선의합적쾌속아상소변연정위산법쾌속제취령건적정학변연,종이제고계통적측량정도,병운용Hough변환계산피측령건적궤하삼수.실측결과표명,해계통적측량정도화준학도고,변연정위정도체0.1 pixel,검측정도체101μm,최대상대오차위0.4%.
To improve detection efficiency and measurement accuracy of the industrial parts,two-dimensional geometric quantities measurement of porous parts based on image detection technology is studied.Firstly,the parts image obtained by CCD is analysed and proccssed to improve the image identifiability.Then,the fast sub-pixel edge location method based on conic fitting is adopted to extract the accurate edge of parts qmckly so as to improve the measurement accuracy of system.Finally,the geometric parameters are computed by using the Hough transform.The experimental results show that the measurement precision and accuracy of system are high enough,the edge positioning accuracy amounts to 0.1 pixel,the inspection accuracy reach to 10μm,and the maximum relative error is 0.4%.
