CAJ | 학술논문

为实现基于投影仪和摄像机的结构光视觉系统连续扫描，需要计算投影仪投影的任意光平面与摄像机图像平面的空间位置关系，进而需要求取摄像机光心与投影仪光心之间的相对位置关系。求取摄像机的内参数，在标定板上选取四个角点作为特征点并利用摄像机内参数求取该四个特征点的外参数，从而知道四个特征点在摄像机坐标系中的坐标。利用投影仪自身参数求解特征点在投影仪坐标系中的坐标，从而计算出摄像机光心与投影仪光心之间的相对位置关系，实现结构光视觉标定。利用标定后的视觉系统，对标定板上的角点距离进行测量，最大相对误差为0.277%，表明该标定算法可以应用于基于投影仪和摄像机的结构光视觉系统。
위실현기우투영의화섭상궤적결구광시각계통련속소묘，수요계산투영의투영적임의광평면여섭상궤도상평면적공간위치관계，진이수요구취섭상궤광심여투영의광심지간적상대위치관계。구취섭상궤적내삼수，재표정판상선취사개각점작위특정점병이용섭상궤내삼수구취해사개특정점적외삼수，종이지도사개특정점재섭상궤좌표계중적좌표。이용투영의자신삼수구해특정점재투영의좌표계중적좌표，종이계산출섭상궤광심여투영의광심지간적상대위치관계，실현결구광시각표정。이용표정후적시각계통，대표정판상적각점거리진행측량，최대상대오차위0.277%，표명해표정산법가이응용우기우투영의화섭상궤적결구광시각계통。
To get continuous scanning of the structured-light vision system which is based on the projector and camera, it is needed to calculate the space position relationship between any light plane of the projector and image plane of the camera. Also the relative position between optical centre of camera and projector requires to be obtained. This paper settles the camera intrinsic parameters. Four corner points in the calibration board are used as characteristic points, also their extrinsic parameters are computed by using the intrinsic parameters of the camera. So coordinates of four characteristic points in the camera coordinate system can be found. The coordinates of the four characteristic points in the projector coordinate system can be computed by using the parameters of the projector itself. Thus, the relative position between optical center of camera and projector is obtained. That’s the process of calibration of structured-light based on camera and projector. The angular distance between corner points on calibration board is measured by structured-light vision system that has been calibrated above. The maximum relative error is 0.277%, which indicates that the calibration algorithm can be used in structure-light vision system based on projector and camera.