基于双目视觉测量系统的编码标志点的检测与重建  

Detection and reconstruction of coded target based on binocular stereo vision system

作　　者：熊雪菲 尚洋[1] XIONG Xuefei;SHANG Yang(College of Aerospace and Engineering,National University of Defense Technology,Changsha 410073,Hunan,China)

机构地区：[1]国防科技大学空天科学学院,湖南长沙410073

出　　处：《实验力学》2020年第5期771-780,共10页Journal of Experimental Mechanics

基　　金：国家自然科学基金(11872070)资助。

摘　　要：在数字近景摄影测量中,通常在被测物体表面粘贴特征明显且与背景差异大的编码标志点来提高对被测物体特征提取与目标匹配的精度。在实际测量应用中,为了对编码标志点的定位和识别具有更高的精度和鲁棒性,因此提出了一种新型的环形圆点编码标志点,该标志点设置了编码起始点,能够提高解码准确率。文中通过实验实现了对目标点的三维重建:首先对编码标志点进行检测和解码;然后采用双目立体视觉的方法重构出编码标志中心的三维信息,测量得到编码标志点之间的距离;最后计算与实际距离的误差。实验结果验证了该编码标志点的设计方案能够满足实际测量需要。In digital close-up photogrammetry,coded targets with obvious characteristics and great difference from the background are usually pasted on the surface of the measured object.When applied to actual measurements,the positioning and identification of coded targets should be of high accuracy and robustness.Therefore,a new type of dot coded mark is proposed,which sets the starting point and improves the decoding accuracy.The 3D reconstruction of the target point is realized by experiments.Firstly,the coded targets are detected and decoded.Then the 3D information of the coded target center is reconstructed by binocular stereo vision.The distance between targets is measured,and the error compared with the actual distance is calculated.The experimental results indicate that the accuracy of 3D reconstruction can be accepted in actual measurements,and the feasibility of the coded scheme is verified.

关 键 词：编码标志 检测 三维重建 双目立体视觉 

分 类 号：O39[理学—工程力学]