Novel effective method of topic caption text in news video
Yaqin Zhao · Computer Engineering and Applications Journal · 2009
This paper presents a novel effective method of topic caption text for news video.The change of the local frame difference between adjacent frames is computed by quantified spatial brightness of pixels in order to identify the frames that caption appears and disappears.And four rules are established to distinguish topic caption from non-topic caption.Afterwards,multiframe integration method is used to obtain one optimal topic caption detection image on the basis of the color of caption text.Finally,the Chinese character is segmented by improved projection approach.The experimental result shows that the proposed method can effectively detect topic caption for structuring and retrieving news video.