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Hierarchical screening method of violent videos based on multiplex mode

A screening method and multi-modal technology, applied in TV, color TV, character and pattern recognition, etc., can solve the problems of low accuracy rate, lack of real-time detection and classification of video content, etc., to improve speed and classification accuracy Effect

Inactive Publication Date: 2010-09-15
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both of the above two technologies involve video classification methods, but there are still the following defects: only visual features or simple fusion of video and audio features are used in video classification methods, and the detection and classification of video content lacks real-time performance. , with low accuracy

Method used

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  • Hierarchical screening method of violent videos based on multiplex mode
  • Hierarchical screening method of violent videos based on multiplex mode
  • Hierarchical screening method of violent videos based on multiplex mode

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Experimental program
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Embodiment

[0041] This embodiment includes the following steps:

[0042] The first step is to extract the audio stream of the video to be screened, and perform segmentation and removal processing to obtain several processed video clips.

[0043] The described segmentation removal process comprises the following steps:

[0044] 1) The extracted audio stream is evenly divided into several sections of audio to obtain several video clips;

[0045] 2) Extract the low short-term energy ratio of the audio in each video segment, and delete the video segments whose audio low short-term energy ratio is lower than the threshold T1, thereby obtaining several processed video segments.

[0046] The low short-term energy ratio of the audio frequency is specifically:

[0047] LER = 1 2 N Σ n = 0 N - 1 ...

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Abstract

The invention discloses a hierarchical screening method of violent videos based on a multiplex mode, belonging to the technical field of multimedia processing. The method comprises the following steps: firstly effectively eliminating some health videos by rapidly screening audio characteristics; selecting candidate scenes and videos which are possibly the violent videos; performing secondary screening on the candidate scenes by using video movement detection and face detection; extracting keyframes from the residual scenes; extracting image characteristics; and matching with a support vector machine so as to screen out the violent videos accurately. The method can effectively solve real-time requirements for network monitoring by using the characteristic for rapidly processing audio frequency, and the judgment time is less than 1% of video length; and the candidate scenes are subjected to subsequent video accurate classification, thus ensuring the accurate requirement of video classification with the classification accurate rate of no less than 95%.

Description

technical field [0001] The present invention relates to a method in the technical field of multimedia processing, in particular to a multimodal-based hierarchical screening method for violent video. Background technique [0002] With the rapid development of the Internet, various multimedia applications continue to emerge, and now network video has become one of the main sources for people to obtain information and entertainment. With the expansion of the scale of video websites and the release and sharing of various videos on the Internet, the government is also paying more and more attention to the monitoring of these websites and the detection of released videos. Some bad videos on video sites, especially some violent and pornographic videos, are strictly prohibited. These videos not only seriously affect the healthy growth of young people, but also pollute the network environment. The supervision of online video is proposed based on this demand. Classifying and grading...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/14G06K9/66
Inventor 孙锬锋蒋兴浩李荣杰冯冰傅光磊
Owner SHANGHAI JIAO TONG UNIV
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