东南大学学报（自然科学版）Issue(5)：1050-1054,5.DOI:10.3969/j.issn.1001-0505.2013.05.025
数字图像相关方法中的标定对三维形貌和变形测量的影响
Effect of calibration on 3D shape and deformation measurement in digital image correlation
摘要
Abstract
To acquire high precision in three dimensional (3D) measurement, calibration of interior and exterior parameters for the imaging system is essential.Starting from the basic principle of digit-al image correlation ( DIC) , the error sources and corrective methods of object imaging are given in theory for the pinhole model of camera imaging.In the experiments, multiple sets of chessboard cal-ibration are studied based on the analysis of the stability and reliability of chessboard calibration.An optimized scheme for the calibration process is given.The process simplifies the complicated calibra-tion steps in the field measurement.The experimental results show that stable calibration parameters can be obtained when there are more than 9 groups of calibration plate attitudes, which leads to more reliable results in the radius calculation of the experimental target.Therefore, an accurate and stable chessboard calibration method makes good contribution to high precision 3D measurement.Thus, 3D DIC with optimized calibration is proved to be an easy method with high reliability and accuracy.关键词
棋盘标定/数字图像相关/三维测量Key words
chessboard calibration/digital image correlation/3 D measurement分类
建筑与水利引用本文复制引用
陈振宁,刘聪,何小元..数字图像相关方法中的标定对三维形貌和变形测量的影响[J].东南大学学报（自然科学版）,2013,(5):1050-1054,5.基金项目
国家自然科学基金资助项目（11272089，11172258）． （）
