Tunnel Three-Dimensional Modeling Research Based on Digital Image Processing

During tunnel excavation, for construction safer and more reasonable, geology characters and enclosing rock grads around tunnels are needed to be continuously analyzed and managed. Digital image processing course is researched. Firstly, rock edges in face images are extracted, then rock object characteristic information is extracted through analyzing rock objects. Reliability rule is established so that rock edges between neighbor faces are corresponded. After that 3-dimensional structure model of tunnel logged parts is built. From the model, tunnel geology structure can be observed in all directions, which guided constructors correctly estimate geology conditions around the tunnel. As a result, tunnel construction safety, speed and efficiency are improved.