Method for denoising tunnel point cloud and generating visualization model

The invention relates to a tunnel point cloud denoising and visualization model generation method, which belongs to the technical field of graphics and visualization, and comprises the steps of collecting tunnel three-dimensional point cloud, and preprocessing tunnel point cloud data; denoising points: dividing the noise points into noise points in the tunnel and noise points outside the tunnel according to the position of the noise, dividing the noise points in the tunnel into outliers caused by a moving target and appendage noise points caused by facilities in the tunnel according to the spatial distribution condition, and performing denoising point processing according to the geometrical characteristics of the existing point arrangement and the actual condition of the tunnel to obtain denoised noise points; noise in the tunnel and noise outside the tunnel are respectively processed; joint filling, surface filling, surface constructing and ground adding are conducted. The method onlydepends on the point clo