The Research Of Caption Location Algorithm In News Video Retrieval Based On Caption

Caption presents in the video frames plays an important role in understanding the content of a video sequence. Using news caption to do video retrieval can reduce the complexity of video retrieval and increase the veracity of video retrieval, it is very useful for video retrieval based on caption. Caption location algorithm is a core technology of video retrieval based on caption, it has become a hotspot. There are different news caption location algorithms for different application backgrounds.In the paper, caption location algorithm has been researched for a video which has complex background. On the basis of the former, the main works are as follow:(1) News video retrieval based on caption has been researched, focused on the caption location algorithm and its application.(2) An algorithm of news caption location based on C-mean clustering and edge detection is proposed for a video which has complex background. The experimental results show that the algorithm performs well.(3) In order to enhance the velocity of caption location, the rapid C-means clustering algorithm of fixed initial cluster center is proposed for the special caption when doing C-means clustering extraction. (4) Noise reducing technology has been researched. Using vertical differential coefficient and median filter to reduce the influence of complex background, median filter uses the custom template (1,1,1,1,1), it is effective.