摘要
介绍利用一个经过标定的CCD相机和一个测距仪,根据近景摄影测量理论进行海上打桩时的桩位定位模型。先利用Robert边缘检测算子和Hough变换,实时处理CCD相机采集的图像,提取桩边缘直线,利用CCD相机的内外方位元素,测距仪坐标及其量测值,再根据不同的打桩类型(仰桩、俯桩和直桩),建立求解桩中心坐标的数学模型,最后利用桩中心初值和牛顿下山法实时解算并获取设计高程面内的桩中心工程坐标,通过现场测试以及观测数据的计算,验证此方法的正确性。
In accordance with the theory of close-range photogrammetry,sea piling position model is introduced using a calibrated non-metric CCD camera and a rangefinder.Using Robert edge detector and Hough transform,real-time processing images collected by CCD camera to get the straight line of pile edge;using the interior and exterior orientation elements of CCD cameras,the rangefinder coordinates and its measured value,a mathematical models to solve pile center coordinates is set up according with different piling type（up,down,straight）.By the initial value of pile center coordinates and Newton downhill method,pile center coordinates in CCD elevation level is obtained,as real-time access to engineering coordinates of pile center in design level.Data through the field test verifies the correctness and feasibility of this method.
出处
《测绘学报》
EI
CSCD
北大核心
2010年第3期238-244,共7页
Acta Geodaetica et Cartographica Sinica
基金
上海市教委科研创新项目(10ZZ25)
关键词
近景摄影
海上打桩
定位模型
CCD相机
close range photogrammetry
sea piling
position model
CCD camera
