RESUMEN
Objective Aiming at the 3D skull model with great difference in initial posture and resolution, a skull registration method based on feature contour line is proposed in the paper. Methods Firstly, contour lines which include eye, nose, temporal bone, maxilla and jawbone are extracted; Secondly, the types of contour are distinguished according to their length and shortest distance between them, and the corresponding relationship is established between the two skulls needed to register, thus the coarse registration of skulls is completed; Finally, an improved iterative closest point (ICP) algorithm is proposed by integrating weight into ICP, which is used to complete fine registration of skulls, thus the accurate registration of skulls is achieved at last. Results Registration between a unknown skull and 300 reference skulls is done, and the experimental results show that the proposed registration method could complete 3D skull registration, which could get high accuracy and speed in fine registration. Conclusion So the skull registration method based on local contour line is an accurate and fast 3D skull registration method.