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。
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.
作者
姜国华
JIANG Guohua(Geographic Information Engineering Brigade of Jiangxi Geological Bureau,Nanchang 330002,China)
出处
《经纬天地》
2024年第2期32-36,共5页
Survey World
