Partial Face Recognition: An Alignment Free Approach
Many approaches have been developed for holistic face recognition with impressive performance. However, few studies have addressed the question of how to recognize an arbitrary image patch of a holistic face. In this paper, the authors address this problem of partial face recognition. Partial faces frequently appear in unconstrained image capture environments, particularly when faces are captured by surveillance cameras or handheld devices (e.g. mobile phones). The proposed approach adopts a variable-size description which represents each face with a set of key-point descriptors. In this way, they argue that a probe face image, holistic or partial, can be sparsely represented by a large dictionary of gallery descriptors.