Three-dimensional dental model tooth segmentation method

The invention discloses a three-dimensional dental model tooth segmentation method, and belongs to the field of medical image segmentation. For three-dimensional dental model data, each tooth in the model is segmented, and the method comprises the following processing steps: data preprocessing, including dental arch line fitting, dental arch line discretization and grid subdivision; tooth-tooth and tooth-gum edge detection based on the depth image and the projection image; a region growing algorithm based on multi-objective optimization; and realizing dentition segmentation and tooth segmentation. According to the method, the dentition and the teeth can be fully automatically and accurately segmented, a large number of jaw model data sets are not needed, the jaw model does not need to be marked in advance, a single tooth can be accurately segmented under the condition of a small sample, an early-stage marking task can be carried out on a tooth segmentation system based on deep learning, and the accuracy of th