Detection of score changes in sport videos using textual overlays

Sport videos are very popular content among consumers. Many of such videos include overlaid textual data about the game, such as score or player names. But, when the video is viewed on a small screen textual information becomes illegible. In this work we propose a fully automatic system for detecting changes in overlaid textual information, such as the game score. Our system detects text in the video and then marks the spatial and temporal coordinates of where the changes that have occurred in the text. This enables us to make text legible on a small screen by displaying an enlarged score box at the time of score change events. The proposed method was tested on a dataset of different sport videos, collected from YouTube. It achieves good results in terms of accurate spatial score box localization and accurate temporal score-change detection.