摘要
为提高大尺寸摄影测量中编码标志点编码容量和解码准确率,设计一种由定位圆、起始圆和编码圆组成编码标志点。解码时,按圆度和面积提取、区分各种圆;对编码标志点进行透视变换实现编码圆的位置校正;对校正后的编码标志点解码。分别在物、象平面夹角为0°,45°,60°和室外复杂场景进行了实验,解码准确率均可达到100%。实验结果表明:编码标志点具有方便提取和识别、编码容量大、鲁棒性强等优点,为大尺寸摄影测量中数据拼接提供一种新的编码标志点。
In order to improve the encoding capacity and decoding accuracy of encoding marker point in largescale photogrammetry, a large-capacity encoding marker point is designed which is composed of a positioning circle,a starting circle and an encoding circle. During decoding, the circles are extracted and distinguished according to roundness and area, and perspective transformation of the encoding marker point is performed to correct the position of the encoding circle. The corrected coded marker point are decoded. Experiments are performed on the object and image plane angles of 0° ,45°,60° and outdoor complex scenes respectively,and the decoding accuracy rate can reach to 100 %. The experimental results show that the encoding marker point has the advantages of convenient extraction and recognition, large coding capacity and strong robustness, and provide a new encoding marker point for data splicing in large scale photogrammetry.
作者
孟祥丽
刘瑶
吴涛
MENG Xiang-li;LIU Yao;WU Tao(School of Information Engineering,Lingnan Normal University,Zhanjiang 524048,Chin)
出处
《传感器与微系统》
CSCD
2018年第7期42-44,共3页
Transducer and Microsystem Technologies
基金
国家自然科学基金资助项目(61402399)
广东省教育厅特色创新项目(2017GXJK104)
关键词
摄影测量
编码标志点
几何校正
数据拼接
photogrammetry
encoding marker point
geometric correction
data splicing
