1) The modeling process is to convert the point cloud data into solid 3D specimen grid data, restore the real entity structure and actual size of the specimen to be tested, and endow the 3D specimen with texture by using the texture image data automatically obtained by the camera, thus completing the 3D digital model of geological specimens with real structure and real texture (Figure 4.2).
Figure 4.2 Materialization of specimen point cloud data and 3D digital entity and texture of specimen.
2) Three-dimensional digitization of rock specimens requires triangulation function of Faro scene. That is, in the Faro scene software, the point cloud data of the imported sample is used to construct the grid, and the point cloud data is transformed into entity data, that is, into the grid data of the sample.
3) There is no real texture information in the three-dimensional materialized rock samples, so it is necessary to use the digital camera carried by the three-dimensional laser scanner to automatically obtain texture image data. In Faro Scene software, the command of applying images is executed, and the texture is given to the three-dimensional grid of rock samples, so as to realize the three-dimensional digitization of rock samples with real structure and real texture. Finally, a series of 3D model files such as Cache.c3 d, Information.c3 d, Level 1.c3 d, World.c3 d, and htm files are generated.
4) Using KUBIT PointCloud 6.0 software, the discrete structure point cloud data of the specimen is transformed into entity data, and the entity grid data of the specimen with real shape, structure and actual size is constructed.
Fig. 4.3 Point cloud data of three-dimensional laser scanning specimen, point cloud data in process, materialized point cloud data and textured high-precision model.
5) Using KUBIT PhotoPlan 6.0 software, paste the texture on the specimen grid to form a three-dimensional digital model of the specimen with real structure and real texture (Figure 4.3).
6) Finally, add the mouse interactive browsing operation function, press the left mouse button, move the mouse to rotate the model up and down, and the pulley in the mouse can zoom in and out of the model.