单摄像机结构光扫描系统中投影仪标定技术

Research on projector calibration in one-camera 3-D measurement systems

传统的单摄像机、单投影仪三维扫描系统,利用相位值计算被测物体的高度信息,可操作性差,且测量精度不高。将立体视觉的三维重构技术引入到单摄像机、单投影仪扫描系统,利用相位值实现投影仪与摄像机的匹配,根据双目视觉的原理进行三维重构,测量精度明显提高。该技术的关键是投影仪的定标,研究了基于相位匹配技术的投影仪标定算法,实验结果验证了该算法的可行性。

The traditional one-camera system uses the phase value to calculate the height information, the disadvantage is that the maneuverability and the measurement accuracy is not so good. The 3D reconstruction method based on stereo vision is introduced to the one-camera-one-projector system. Phase value is used to accomplish the task of matching the camera and the projector. The principle of binocular vision is used to reconstruct the object, it causes that reconstruction precision is obviously elevated. The calibration of one-camera-one-projector system has been studied and the method of projector calibration based on phase matching is proposed. The targets of which the coordinates are known exactly is used. Experiment results show this phase unwrapping method is feasible.