影像快速拼接技术在基础测绘DOM数据更新中的应用
Application of image rapid mosaicking technology in basic surveying and mapping DOM data update
姜国华1
作者信息
- 1. 江西省地质局地理信息工程大队,江西 南昌 330002
- 折叠
摘要
城镇数字化的快速发展,急需低成本、高精度、速更新的基础测绘成果生产技术.基于此,本文使用无人机航拍影像,根据POS系统数据的姿态和高程数据及影像畸变参数对航拍的影像进行畸变纠正,再使用SIFT算法提取特征点,并使用特征点快速搜索匹配技术对无人机影像进行快速匹配拼接,最后根据参考DOM底图与DEM,使用二次有理函数模型进行正射校正,将拼接的影像生成DOM.使用已知点对生成的DOM进行精度验证,拼接影像的平面精度和高程均满足1∶1000的DOM测绘成果要求.该技术方法能够基于倾斜摄影测量影像快速生产DOM数据,为航测实时生成DOM数据生产提供技术参考.
Abstract
The rapid development of urban digitalization needs urgently the low-cost,high-precision,and fast updating technology for basic surveying and mapping results production.Based on this,in this paper UAV aerial photography images are used to correct the distortion of the aerial photography images according to the attitude and elevation data of the POS system data and image distortion parameters,then the SIFT algorithm is used to extract feature points,the feature point fast search matching technology is used to quickly match and stitch the UAV images.Finally,according to the reference DOM base map and DEM,the orthorectification is performed by using the quadratic rational function model,and the stitched images are generated into DOM.The accuracy of 1∶1000 the generated DOM is verified by using known points,and the plane accuracy and elevation of the stitched images meet the requirements of 1∶1000 DOM surveying and mapping results.
关键词
无人机影像/畸变纠正/SIFT算法/DOMKey words
UAV image/distortion correction/SIFT algorithm/DOM引用本文复制引用
出版年
2024
NETL
NSTL
万方数据