Three-dimensional scene catastrophe monitoring and early warning method

The invention discloses a three-dimensional scene catastrophe monitoring and early warning method, which comprises the following steps: based on an improved seed region growing algorithm, carrying out segmentation processing on an original image to obtain a segmented original image; training a pre-constructed debris flow image recognition model according to the segmented original image to obtain a trained debris flow image recognition model; the method comprises the following steps: performing laser scanning on a monitoring area once every a preset time period to obtain point cloud data at the current moment, and positioning the point cloud data based on a GNSS navigation system and an inertial navigation system to obtain standard laser point cloud data; obtaining an initial DEM based on the standard laser point cloud data; filtering the initial DEM to obtain a final DEM; and performing geological disaster monitoring on the monitoring area by using the trained debris flow image recognition model and the final