基于数字像机的建筑物立面测量

Building facade measurement based on digital cameras

随着数字像机的普及与应用,近景摄影测量技术作为地面测绘的补充手段已应用于诸多领域。本文基于室外几何检校场对数字像机进行微米级高精度几何检校,通过正直摄影方式提取立面区域立体像对,经过光束法区域网平差、立面影像密集点云生成、立面测绘数字线划图采集、精度评价等环节,论证了近景摄影测量用于建筑物立面测量的可行性。结果表明,立面测量的成果精度满足1∶500地形图的测绘需求。

With the popularization and wide application of digital camera,close range photogrammetry technology has been used in many fields as a supplementary means of ground surveying and mapping.Based on the outdoor geometric calibration field,the micron level geometric calibration of the digital camera is carried out in this paper,and the stereoscopic image pair of the facade area is obtained through the upright photography method.Line drawing collection,evaluation accuracy,calculated close range photogrammetry buildings for facade measurement results show that the accuracy of facade measurement results meets the surveying and mapping requirements of 1∶500 topographic map.