The invention discloses a method for automatically registering bent
bone fracture and pre-bending modeling of an
internal fixation steel plate, which comprises the following steps: S1, extracting maindirection of broken
bone model point set by PCA
algorithm and selecting clustering seed point along main direction; S2, extracting main direction of broken
bone model point set by PCA
algorithm; S2,respectively constructing
capsule mapping models at both ends of the broken
bone model; S3, clustering the feature points of the mapping model constructed in S2 by using
OPTICS algorithm; 4, extracting and segmenting the
point set of the cross-section part of the broken bone model; S5, precisely registering the broken bone model according to the two section point sets obtained by the segmentation;S6: selecting the
control point at the fracture position of the fracture model, and thickening the triangular patch within the range of the
control point to obtain the steel plate model. The method utilizes many algorithms such as
curve fitting, clustering, feature
point mapping and so on, realizes the automatic splicing of bending bones efficiently and accurately, realizes the automatic registration of bending bones model and prebending of steel plate, and does not need manual operation.