摘要
提出一种基于相位标靶的光学坐标测量方法,与有3个以上的标记点的辅助测量棒(传统标靶)相比较,由于相位标靶特征点数量的大量增多以及基于相位计算的精确的特征点的提取,使得用这种标靶进行测量时,其测量结果更为准确和可靠。在计算机屏幕上产生二维正弦条纹,并以此作为校准靶进行摄像机标定。设计制作的相位标靶由小型特征图象屏和测棒组成,采用相位测量技术及条纹处理方法计算特征图象屏各点的相位和面内坐标,进而计算测棒上测点的三维坐标。将该相位标靶用于光学坐标测量,提出了标靶移动时坐标变换的计算公式和移动距离的计算方法,分析了测量误差的成因。实验得到了准确的光学坐标测量结果,证明了该方法的有效性。
On the basis of regarding traditional aided measuring probe as target ,adopted phase and fringe technique to calibrate a camera system or to measure a 3-D object, A new target phase target, is proposed. Comparing with traditional method, the new calibration result of camera system is more reliable because of more accurate to extract the grids based on fringe analysis and phase technique. Camera is calibrated by calibration target which is built by 2- dimensional sinusoidal fringe having been projected on the computer screen. A new and portable phase target is designed originally, optical coordinate measurement is carried through the phase target. Moreover, coordinate system transformation formula and the moving distance of phase target is calculated. Exact measuring result is obtained in our experiments, which proves that the method is effective.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2009年第9期2452-2457,共6页
Acta Optica Sinica
基金
国家自然科学基金(60838002)资助课题
关键词
测量
光学坐标测量
相位标靶
标定
校准靶
辅助测量棒
measurement
optical coordinate measurement
phase target
calibration
calibration target
aided measuring probe
