摘要
基于空间几何知识,通过建立空间直角坐标系、确定位移在Π平面上的投影,以及反推实际位移向量等三步,推导出数字图像监测系统在二维平面内的位移测量数学原理。然后选择不同场景展开现场应用,通过分析人工与自动化监测成果数据,发现光照强度变化、温度变化和距离增加,均会降低监测精度。
Based on the knowledge of space geometry,this paper deduces the mathematical principle of displacement measurement of digital image monitoring system in two-dimensional plane by establishing a space rectangular coordinate system,determining the projection of the displacement on theΠplane and reversing the actual displacement vector.Then,different scenarios are selected to carry out field application.Through the analysis of manual and automatic monitoring results data,it is found that changes in light intensity,temperature changes and distance increase will reduce the monitoring accuracy.
作者
张子真
ZHANG Zizhen(BGI ENGINEERING CONSULTANTS LTD.,Beijing 100038,China)
出处
《城市勘测》
2024年第1期156-160,164,共6页
Urban Geotechnical Investigation & Surveying
关键词
空间几何
数字图像相关技术
精度
space geometry
digital image related technology
accuracy
