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Automatic detection method and device of video rolling subtitle

A technology for automatic detection and subtitles, applied in the field of image processing, to achieve the effect of convenient extraction and improved accuracy

Inactive Publication Date: 2014-06-18
BEIJING JETSEN TECH
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] The embodiment of the present invention provides a method and device for automatic detection of video floating subtitles, which solves the problem of automatic detection of floating subtitles in TV and video media, and then extracts the subtitles in the video

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  • Automatic detection method and device of video rolling subtitle
  • Automatic detection method and device of video rolling subtitle
  • Automatic detection method and device of video rolling subtitle

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Embodiment Construction

[0039] A method and device for automatically detecting video subtitles according to an embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0040] This patent designs an automatic detection method for video subtitles based on feature point tracking and text verification. Since the moving subtitles in video programs generally appear at the bottom or top of the video screen, the top or bottom of the video is set as the region of interest. For the region of interest that has been set, first perform strong corner detection to obtain the points of the maximum curvature of the image edge in the video frame, and then perform Lucas–Kanade optical flow tracking on these points to obtain these points in the video stream. The motion direction and size in the program, according to the motion method and size of the obtained points, eliminate the points that do not meet the characteristics of the motion direction of the float...

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Abstract

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.

Description

technical field [0001] The invention relates to the field of image processing, in particular to an automatic detection method and device for video floating subtitles. Background technique [0002] In recent years, with the rapid development of television and video media, moving subtitles that move horizontally or vertically often appear in television and video media, and they widely appear in television and video media as text advertisements and notices in video media. However, monitoring it manually has low work intensity and low efficiency. Therefore, how to realize the automatic detection of video floating subtitles has very important research and application value. [0003] Existing methods for detecting moving subtitles include two types of methods: independent video frame detection and continuous video frame detection. [0004] Independent video frame detection is to classify swimming subtitles into the general subtitle detection framework. Through the logical process...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/62
Inventor 顾景
Owner BEIJING JETSEN TECH
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