Abstract: In recent years, a large number of cultural heritage damages have occurred at home and abroad. In this case, the cultural heritage needs to be digitally modeled for regular repair. Taking the former residence of Zhu De as an example, this paper elaborates the detailed digital modeling process of ancient architecture based on 3D laser scanning technology by combining 3D laser technology and close-range photogrammetry technology, and provides an example for further research on cultural heritage modeling. Mainly through the following steps:This paper obtains data by using Trimble TX8 (including acquisition of image data and point cloud scan data). Then, it uses Trimble RealWorks to preprocess data (including data registration, culling, data resampling). Finally, it uses 3ds MAX Photoshop to produce 3D model (including repairing point cloud voids, making CAD drawings, plain mold making, texture mapping, and post rendering). Through this research, it is found that the use of close-range photogrammetry technology combined with three laser technologies can perfectly repair the damaged part, and the model can be clearly established by splitting the component to improve efficiency.

Key words: 3D laser technology, close-range photogrammetry, digital model, data acquisition, data preprocessing, 3D modeling