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Comparison of Text Beginning Frame Detection Methods in News Video Sequences
Sanghee Lee(이상희),Jungil Ahn(안정일),Kanghyun Jo(조강현) 한국방송·미디어공학회 2016 방송공학회논문지 Vol.21 No.3
Overlay texts are artificially superimposed on the broadcasting videos by human producers. These texts provide additional information to the audiovisual content. Especially, the overlay texts in news video contain concise and direct description of the content. Therefore, it is most reliable clue for constructing a news video indexing system. To make this indexing system in the TV news program, it is important to detect and recognize the texts. This paper proposes the identification of the overlay text beginning frame to help the detection and recognition of the overlay text in news videos. Since all frames in the video sequences do not contain the overlay texts, the overlay text extraction from every frame is unnecessary and time-wasting. Therefore, to focus on only the frame containing the overlay text can be enhanced the accuracy of the overlay text detection. The comparative experiments of the text beginning frame identification methods were carried out with respect to Korean television news videos. Then the appropriate processing method is proposed.
비디오 품질 향상 응용을 위한 오버레이 텍스트 그래픽 영역 검출
이상희(Sanghee Lee),박한성(Hansung Park),안정일(Jungil Ahn),온영상(Youngsang On),조강현(Kanghyun Jo) 한국방송·미디어공학회 2013 방송공학회논문지 Vol.18 No.4
This paper has presented a few problems when the 2D video superimposed the overlay text was converted to the 3D stereoscopic video. To resolve the problems, it proposes the scenario which the original video is divided into two parts, one is the video only with overlay text graphic region and the other is the video with holes, and then processed respectively. And this paper focuses on research only to detect and extract the overlay text graphic region, which is a first step among the processes in the proposed scenario. To decide whether the overlay text is included or not within a frame, it is used the corner density map based on the Harris corner detector. Following that, the overlay text region is extracted using the hybrid method of color and motion information of the overlay text region. The experiment shows the results of the overlay text region detection and extraction process in a few genre video sequence.