Experimental Research of Aerial Triangulation of UAV Remote Sensing Image Based on DPGrid

As a new type instruments of aerial remote sensing, the low-altitude unmanned aerial vehicle(UAV) mapping systems with its flexible, convenient and efficient advantages make up the deficiencies of the traditional aerial photography in a small area of large scale mapping, emergency and a new countryside surveying, urban rapid updating, focused region monitoring and so on. For the characteristics of unequal overlap, big swing-tilt angle, using the matching technique that combine SIFT feature matching with least squares matching to achieve automatic and high-precise matching, and availably resolve aerial triangulation difficulty of UAV images. Basing on an analysis of UAV remote sensing system, DPGrid (Digital Photogrammetry Grid) system is presented, the tests showed that matching algorithm of the module is advanced, reliable and accurate adjustment, can meet requirements of production.