用单个摄像机获取三维视觉信息的一种方法

讨论了在平面坐标系上摄像机的标定和利用单个摄像机获取三维视觉信息的一种方法。实验结果表明，采用单个摄像机获取三维视觉信息的精度与摄像机相对目标物体的高度及对象物本身的厚度有关，在视场范围内，对象物的厚度越小，摄像机坐标中心相对于目标物体表面中心的距离越远，定位精度越好。

A Method of Acquiring 3-D Visual Information Using a Single Camera

A calibrating method for a camera in a plane coordinate system and a method Of acquir-ing 3-D visual information using a single camera are discussed.The principle of geometric-transformation and the homogeneous coordinate system transformation are used for the cali-bration and the 3-D visual information is acquired by moving the camera mounted on the endeffector of a manipulator,Experimental results show that, during calibration,the smallerthe thickness of the calibrated object used is,the higher the calibrating accuracy will be,Thepositioning accuracy of 3-D visual information using a single camera is dependent on the dis-tance between the camera and the object as well as on the thickness of the object itself. Thesmaller the thickness of the object and the longer the distance is,the higher the positioningaccuracy will be.