Corner detection is widely used in real-time systems under complex environments, e.g., the augmented reality system, and is crucial to implement the tracking registration. The classical fast corner detection algorithm performs poorly under noise and strong light conditions, while Harris corner detection algorithm cannot work in real time. Therefore, both of them cannot well satisfy the requirement of the augmented reality system. To address these problems, a novel corner detection algorithm, the star-based grayscale projection, is proposed in t...