近景摄影测量标志中心的自动提取算法

Automatic Extraction Algorithm of Mark Centers in Close range Photogrammetry

摘要:

提出了一种针对不定形状近景摄影测量标志中心的自动提取算法.结合近景摄影测量的工程实践，在控制信息预测的基础上实现自适应Canny算子提取标志边缘，利用边缘提取结果自动聚类的方法重建标志边缘.以北京故宫午门和武汉大学校园升旗台建筑测量工程为例说明该方法能够大大减少标志量测的工作量.

Abstract:

An automatic algorithm was proposed for extracting center of irregular shape mark in the close range photogrammetry. Combined with close range photogrammetry engineering practice and based on photogrammetry control information, the edge of man made mark was detected by using adaptive canny operator, then, reconstructed via automatic clustering. A case study of the Meridian Gate of the Forbidden City in Beijing and Wuhan University Campus’s Flag Station Building surveying projects proves that the method greatly reduces the workload of the mark measurement.