A Comprehensive Survey on Pose-Invariant Face Recognition
It addresses the problem of recognizing faces under varied poses for computer vision applications, but is incremental as it is a survey paper summarizing existing work.
The paper surveys pose-invariant face recognition (PIFR), highlighting its challenges and reviewing established techniques grouped into four categories, but does not present new experimental results or concrete performance numbers.
The capacity to recognize faces under varied poses is a fundamental human ability that presents a unique challenge for computer vision systems. Compared to frontal face recognition, which has been intensively studied and has gradually matured in the past few decades, pose-invariant face recognition (PIFR) remains a largely unsolved problem. However, PIFR is crucial to realizing the full potential of face recognition for real-world applications, since face recognition is intrinsically a passive biometric technology for recognizing uncooperative subjects. In this paper, we discuss the inherent difficulties in PIFR and present a comprehensive review of established techniques. Existing PIFR methods can be grouped into four categories, i.e., pose-robust feature extraction approaches, multi-view subspace learning approaches, face synthesis approaches, and hybrid approaches. The motivations, strategies, pros/cons, and performance of representative approaches are described and compared. Moreover, promising directions for future research are discussed.