Three-dimensional face reconstruction method and device, medium and equipment

Abstract

The invention discloses a three-dimensional face reconstruction method, which comprises the following steps: obtaining point clouds respectively corresponding to two frames to be registered, and taking the point clouds as a first group of point clouds and a second group of point clouds; determining attribute vectors of feature points in the first group of point clouds and the second group of pointclouds, the feature points being concave points or convex points in a curved surface formed by the pointing point clouds, and the attribute vectors of the feature points comprising average curvaturesand Gaussian curvatures corresponding to the feature points; performing coarse registration on the first group of point clouds and the second group of point clouds according to the attribute vectorsof the feature points in the first group of point clouds and the second group of point clouds to obtain coarse registration initial values; performing fine registration on the first group of point clouds and the second group of point clouds based on the coarse registration initial value through a point cloud accurate registration algorithm; due to the fact that the rough registration initial providing value provides a good iteration initial position for fine registration, the problem that registration is trapped in local optimum is avoided, registration precision is improved, and then precision of the finally-built three-dimensional face model is improved. The invention further discloses a corresponding device, equipment and a medium.

Description

technical field [0001] The present application relates to the technical field of computer vision, and in particular to a three-dimensional face reconstruction method, device, computer-readable storage medium and equipment. Background technique [0002] 3D face reconstruction technology is a research hotspot in the field of computer vision, and it has a wide range of applications in face recognition, face replacement, face driving, and face editing. [0003] At present, the commonly used 3D face reconstruction technology is the active 3D reconstruction technology. The inventors found that in the application process of the active 3D reconstruction technology in the prior art, the point cloud registration tends to fall into the local optimal problem, resulting in the final reconstruction The accuracy of the 3D face is not high. Contents of the invention [0004] This application provides a 3D face reconstruction method, which uses the attribute vectors including the average ...

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Problems solved by technology

[0003] At present, the commonly used 3D face reconstruction technology is the active 3D reconstruction technology. The inventors found that in the application process of the active 3D reconstruction technology in the prior art, the point cloud registration tends to fall into the local optimal problem, resulting in the final reconstruction The accuracy of the 3D face is not high

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