During tunneling

geological logging and rock mass classification are two major tasks to be concerned

so tunnel driving face image analysis is essential. Traditional analysis is time-consuming

costly and the effect is different with different operators. While conventional approaches are limited

graph and image processing and 3D modeling technology were adopted for tunnel driving face imaging. Tunnel driving face geology image system (TFGIS) was designed to manipulate tunnel driving face

so that rock edges and rock characteristic information can be acquired

by which rock mass was classified. After processing a series of driving face images which were snapped by tracking when tunneling and marking corresponding rocks between two adjacent driving face images

according to rock corresponding relation

3D tunnel model was built up

which can be regarded as reference information for tunneling.