摘要
为简化测量系统中平移轴和旋转轴的标定,提出一种基于一维平面标靶的简易标定方法。将一维标靶放置在数控平台上,控制平台分别做平移和旋转运动,提取每个位置下图像中圆心坐标,利用消隐点和三点透视模型(P3P)原理实现系统轴线空间位置的标定。实验结果表明,该标定方法具有较高的标定精度,平均绝对测量误差为0.0411mm,均方根(RMS)误差为0.0625mm。该标定方法仅需已知的等距共线三点即可完成平移轴线和旋转轴线的高精度标定,降低了标定成本,且计算简单、标定过程灵活方便,适合现场标定。
In order to simplify calibration procedures of translation and rotation axes, a flexible calibration method based on one-dimensional plane target is proposed. Plane target is placed on platform, then the platform is translated and rotated, respectively. The centers of every concentric circle at each location are extracted. The spatial location of system axes are determined using principles of vanishing points and perspective-three-point （P3P）. Experimental results indicate that this calibration method has high accuracy; its average absolute measuring accuracy is 0. 0411 ram, and its root mean square （RMS） error is 0. 0625 ram. This calibration method requires only three collinear points to complete high-precision calibration of translation and rotation axes, which therefore can reduce calibration cost. It concludes that the calculation is flexible and suitable for field calibration.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2012年第11期168-173,共6页
Chinese Journal of Lasers
基金
国家重大科技专项(2009ZX04001-021)资助课题
关键词
测量
视觉测量
线结构光
轴线标定
数据拼接
消隐点
三点透视模型
measurement
vision measurement
line structured light
axis calibration
data fusion
vanishing points
perspective- three- point
