Research on Information Extraction Technology of Wall Cracks in Historic Buildings

The historical building has undergone thousands of years of vicissitudes and changes, and it is in an extremely fragile situation. Therefore, it is urgent to detect and repair the damage of the historical building. In this paper, three-dimensional laser scanning and digital image processing technology are combined to be used in non-contact and non-destructive measurement of cracks in historic building walls. Application results show that this research method can detect historical building crack information more efficiently and accurately. It not only realizes non-destructive measurement of historical building wall cracks, but also expands the application range of 3D laser point cloud data and innovates the protection of ancient buildings. The method is of great significance to the research on the automatic extraction of damage information of historical buildings.