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Automatic detection method and device of video rolling subtitle

The invention embodiment discloses an automatic detection method and device of video rolling subtitles, and belongs to the image processing field; the method comprises the following steps: carrying out strong corner detection to a sensitive area in a video frame so as to obtain characteristic points of a curvature maximum value on an image edge of the video frame; carrying out optical flow tracking to each characteristic points so as to obtain a motion state of each characteristic points in a video stream; rejecting noise spots according to the motion state of each characteristic points, and roughly positioning the subtitle to an alternative position according to an area corresponding to the remaining characteristic points; verifying the alternative position according to a preset character image model, if continuous characters are spotted in the alternative position, then the video frame containing the rolling subtitle is marked. The method and device fully combines features of the rolling subtitle, model verification is carried out for the obtained alternative position, so the rolling subtitle in the video can be marked, thereby reducing the images in a non-subtitle motion area of the motion area in the video, greatly improving accuracy of the subtitle area, and furthermore, the subtitle in the video can be conveniently extracted.
Owner:BEIJING JETSEN TECH
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