基于数字近景摄影测量的若干关键技术研究

Several Pivotal Technique Based on Digital Close Range Photogrammetry

研究了基于数字近景摄影的空间点坐标的测量方法;首先在物体表面粘贴两类标记点,然后通过对标记点进行识别和检测来确定标志点的空间位置,同时,对相关的编码与识别、标记点的亚像素中心定位、照相机标定与空间定向、非编码点的自动匹配等关键技术进行了研究,最后,给出了检测实例并进行了精度验证;实验表明,该方法操作简单,检测范围大,可满足三维物体特别是大面积物体空间检测的需求。

A measurement technique about 3D coordinate of space points based on digital close range photogrammetry is described. First glues two kinds of reference points on the object surface, then by identifing and detecting these reference points carry out its spatial position. At the same time, The key concerned contents, such as code and decode, calibration of the camera, camera orientating technique, high precise image processing algorithm are also researched. Finally, the application confirms the precision of the algorithm. The experiment indicated that the operation of this method is simple and the range is broad, the algorithm can meet 3D object measurement demand especially the object with big area.