Method for processing images in a motor vehicle

A method, for a motor vehicle, for authenticating or identifying a person using a camera configured to generate two-dimensional images in an acquisition plane, said method comprising:

• generating a sequence of images with the camera
• for each image of said sequence of images:
• detecting at least one person in said image,
• defining in the image, at least one region called the “region of interest” for each detected person or group of detected persons,
• for each identified region of interest:
• rectifying the region of interest,
• detecting the face of at least one person in the rectified region of interest,
• generating a 3D model representing each detected face,
• rotating each generated 3D model so that said face is visible straight on in the acquisition plane of the camera,
• authenticating or identifying the at least one person based on the at least one face having undergone rotation, and, if a person is not authenticated or identified, carrying out the following steps:
• tracking the at least one person detected in a preceding image in a following image of the sequence of generated images,
• implementing the method described above on the following image,
• fusing the 3D face model of the tracked person generated from the following image with the 3D face model of the tracked person generated in the preceding image.