Telop character extraction from video data

We introduce a telop character extraction method that consists of two steps: detecting a telop frame from a video sequence; and extracting telop character regions in the telop frame. Frames in which telops appear and disappear are detected regardless of background movement in the video sequence by selecting frames that have large intensity histogram differences from the previous frames and have large agreement in edge pixel positions with the subsequent frames. By segmenting the color space in a sequential manner, the method then quickly segments the detected telop frames without deteriorating segmentation results. It then filters out non-telop character regions obtained from the segmentation by using color, location, size and temporal movement features of the regions. We implement the proposed method on a PC and a workstation, and confirm that it can process live broadcast video data very effectively