Method and device for acquiring front face point set of head point cloud based on curvature information

Abstract

The invention relates to a method and a device for acquiring a front face point set of a head point cloud based on curvature information. The method comprises the following steps: solving curvature values of points in head point cloud data to obtain curvature distribution data of head point cloud; screening out curvature maximum points in the head point cloud to obtain a curvature maximum point set; performing clustering operation on the curvature maximum point set to obtain six point clusters; performing tissue division on the centroids of the six point clusters, determining the two point clusters with the centroids close to the outline and having a symmetric relationship as binaural, determining the point cluster with the maximum curvature mean value as a nose, and determining the area where other point clusters are gathered as a front face; according to the center-of-mass coordinates of the binaural and nose point clusters, a section for segmenting the head point cloud is constructed, the head point cloud is divided into two parts, and point cloud data including a point cluster aggregation part is taken out to obtain a front face point set; according to the invention, the front face point set can be obtained from the head point cloud.

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