3D face identity authentication method and apparatus

An identity authentication method, comprising:

• obtaining a depth image containing a target face and an original two-dimensional (2D) image containing the target face;
• and
• performing identity authentication by performing steps comprising:
• obtaining posture information of the target face by registering the depth image containing the target face with a reference face three-dimensional (3D) texture image;
• projecting the reference face 3D texture image to a 2D plane to obtain a reference face 2D image according to the posture information of the target face;
• comparing the original 2D image containing the target face with the reference face 2D image to determine a similarity value;
• and
• in response to that the similarity value exceeds a first threshold, determining that the identity authentication succeeds.

A identity authentication method, comprising:

• obtaining a depth image containing a target face and an original two-dimensional (2D) image containing the target face;
• and
• performing identity authentication by performing steps comprising:
• obtaining posture information of the target face by registering the depth image containing the target face with a reference face three-dimensional (3D) texture image;
• obtaining a target face 2D image by aligning the original 2D image containing the target face with the posture information of the target face;
• extracting feature information from the target face 2D image;
• comparing the feature information of the target face 2D image with feature information of a reference face 2D image to determine a similarity value;
• and
• in response to that the similarity value exceeds a first threshold, determining that the identity authentication succeeds.