Method for strengthening definition of sight important zone in network video
An important area and enhanced network technology, applied in color TV parts, TV system parts, digital video signal modification, etc., can solve the problems of slow subtitle detection, sensitive position information, slow speed, etc., and achieve improvement The effect of detecting speed and improving picture quality
Inactive Publication Date: 2009-09-09
XI AN JIAOTONG UNIV
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Problems solved by technology
The technical limitations of existing subtitle detection methods are manifested in the following two aspects: first, they are sensitive to the position information of subtitles appearing in the screen, and if useful information is not within the specified detection range, they cannot be well applied; The second is that the speed of subtitle detection is slow and cannot meet the requirements of real-time processing, especially for the case of large resolution
Fast detection of face areas in videos also faces the problem of slow speed
Method used
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[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0021] figure 1 A structural block diagram of the overall implementation steps of the method for enhancing the definition of visually important regions in network video in the present invention is given. It includes the following execution steps: execute the subtitle area detection unit 00 and the face area detection unit 01 in parallel; then execute the current frame visually important area determination unit 02 to realize the combination of the two important areas of the human face and the subtitle to obtain the current frame. Visually important area; Next, execute the coding unit 03 based on the visually important area to implement differential coding for the visually important area and the visually non-important area, so as to realize the coding clarity of the enhanced visually important area; finally, the execution unit 04 forms the code ...
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The invention discloses a method for strengthening the definition of a sight important zone in a network video, which is characterized by comprising the following steps: firstly, executing a caption zone detection unit 00 and performing a face zone detection unit 01 in parallel; secondly, executing a current frame sight important zone determine unit 02, realizing the combination of the two important zones and obtaining a sight important zone MAP in a current frame through performing or operating the face important zone and the caption important zone, i.e. MAP is equal to MAPt MAP f, wherein the MAPt is the caption zone of a current caption in a primary video, and the MAP f is the zone of the face zone in a primary image; thirdly, executing a coding unit 03 based on the sight important zone so as to perform the differential coding to the sight important zone and the sight non-important zone, and realizing that the coding definition of the sight important zone is strengthened; and fourthly, executing a unit 04 to form a video code flow to be sent.
Description
technical field [0001] The invention relates to a method for enhancing the clarity of important visual areas in network videos, in particular to a method for enhancing the clarity of speech content subtitles and human face areas in the video. Background technique [0002] The subtitles of speech content and the clarity of characters' faces in the video are an important factor affecting the audience's appreciation, and it is also an important content in the video-on-demand service under the network environment. Subtitle information is an important information in a video program, which intuitively illustrates the content of the video program and can help viewers understand the storyline therein. Rapid detection and localization of video subtitles is an important link in many video analysis and retrieval systems. The expression of the face in the video is one of the important areas that the audience pays attention to, and it is also the main channel for the audience to obtain ...
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Login to View More IPC IPC(8): H04N5/208H04N5/445H04N19/85H04N21/2387
Inventor 钱学明刘贵忠李智王喆郭旦萍姜海侠王琛汪欢
Owner XI AN JIAOTONG UNIV