This paper presents a novel algorithm for localizing and extracting the four clock-digits by using the knowledge of the digital video clock. This algorithm has triple merits compared with the existing ones. First, it is novel and easy implementation. It uses the pixel second-periodicity method. By using this method the algorithm omits the several tedious image processing steps. Second, it is faster than the existing algorithms. Third, it has good performance in both localization and extraction. The good performance is due to that it uses the do...
