A Method for Automatic Registration of Realistic 3D Models without Control Points

In order to realize the periodic surface monitoring and early warning of the multi-terrain realistic 3D model of the landslide, it is for the unmanned aerial vehicle to use multiphase optical images to measure the ground control points during each phase of image acquisition, and proposes an automatic registration algorithm for the terrain-real 3D model, to automatically establish a realistic 3D model of multiple time series with a unified spatial reference. The experimental results show that the average spatial difference of the realistic 3D model after registration is as low as 0.01m. This method is suitable for periodic dynamic surface monitoring and change detection scenarios of landslides and natural high and steep slopes, and has technical advantages such as high precision, low safety risk, low cost, and non-contact surface monitoring.