摘要
在多测合一的背景下,无人机飞行期间因飞行姿态不够稳定等因素,使采集的影像存在几何畸变,进而影响无人机影像数字正射影像图(DOM)的精度和质量,使其无法准确反映目标区域的真实状况,为此研究多测合一背景下无人机影像DOM制作关键技术。采用三维激光扫描技术采集目标的三维点云数据,通过无人机倾斜摄影采集目标区域的无人机影像并校正其几何畸变。将采集结果整合后,输入计算机软件获取单张影像的正射影像,对正射影像镶嵌后采用分幅等方法制作快视图,从而完成所需比例尺的DOM制作,将制作的无人机影像应用于工程建设项目多测合一的三个阶段,以助力审批提速增效。测试结果表明,所提方法在平面坐标X和Y方向上误差最大值为8.06 cm,所制作的DOM中各个区域之间的区分明显,接边精度值均在0.86以上,目标边坡长度与实际边坡长度结果吻合程度高,误差较小。
In the context of multi-measurement integration,due to factors such as unstable flight attitude during unmanned aerial vehicle(UAV)flight,the collected images have geometric distortions,which in turn affect the accuracy and quality of the digital orthophoto map(DOM)of UAV images,making it unable to accurately reflect the true situation of the target area.Therefore,key technologies for producing DOMs of UAV images in the context of multi-measurement integration were studied.Three-dimensional(3D)laser scanning technology was adopted to collect 3D point cloud data of the target,and UAV oblique photography was used to capture UAV images of the target area and correct their geometric distortions.After integrating the collected results,they were input into computer software to obtain the orthophoto of a single image.After embedding the orthophoto,methods such as framing were used to create a quick view,thus completing the DOM production of the required scale.The produced UAV images were applied to the three stages of multi-measurement integration in engi⁃neering construction projects to speed up and increase efficiency in approval.The test results show that the proposed method has a maximum error of 8.06 cm in the X and Y directions of the plane coordinates.The distinction between various regions in the produced DOM is obvious,and the edge accuracy values are all above 0.86.The target slope length is highly consis⁃tent with the actual slope length results,and the error is small.
作者
余子毅
YU Ziyi(Guangzhou Urban Planning&Design Survey Research Institute Company Limited,Guangzhou,Guangdong 510060,China;Collaborative Innovation Center for Natural Resources Planning and Marine Technology of Guangzhou,Guangzhou,Guangdong 510060,China;Guangdong Enterprise Key Laboratory for Urban Sensing,Monitoring and Early Warning,Guangzhou,Guangdong 510060,China)
出处
《北京测绘》
2025年第9期1344-1350,共7页
Beijing Surveying and Mapping
基金
广东省重点领域研发计划(2020B0101130009)
广东省城市感知与监测预警企业重点实验室基金(2020B121202019)。
关键词
多测合一
无人机影像
数字正射影像图(DOM)制作
关键技术
几何畸变校正
三维点云数据
multi-measurement integration
unmanned aerial vehicle(UAV)image
digital orthophoto map(DOM)production
key technology
geometric distortion correction
three-dimensional point cloud data
