3D face recognition based on RGB-D data: a survey

Face recognition, as a convenient, natural, and widely applied emerging technology, has achieved many significant research results in recent years. 2D face recognition has drawn extensive studies, while previously,2D face recognition is too sensitive to variations in features like facial expressions. To avoid the shortcoming, more attention was paid to the optimization of algorithms, stronger computational capabilities, and fusion strategies, which contributed greatly to the accuracy of face recognition and made it more outstanding. Compared to existing methods, RGB-D images tend to be more robust and reliable. Based on different processing methods of RGB-D 3D face data, researchers have proposed numerous 3D face recognition methods, such as 3D reconstruction methods from monocular RGB-D images, methods based on point cloud data, and methods based on image depth map data. This paper focuses mainly on the image depth map data method, analyzing its rich development history and its unique advantages and disadvantages in RGB-D 3D face recognition. Additionally, we introduced some common RGB-D face datasets, analyzing data collection methods.