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On-line extraction method of monitoring video feature frames

An extraction method and technology for monitoring video, which are applied in the fields of instruments, computing, character and pattern recognition, etc., and can solve problems such as inability to apply monitoring video.

Inactive Publication Date: 2016-06-15
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, existing video frame extraction methods based on scene change and lens change detection cannot be applied to surveillance video

Method used

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  • On-line extraction method of monitoring video feature frames
  • On-line extraction method of monitoring video feature frames
  • On-line extraction method of monitoring video feature frames

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Embodiment

[0035] A monitoring video feature frame online extraction method, comprising the steps as follows: firstly, the video sequence is subjected to timing change point detection; and the detected change points are used to divide the video into video segments containing different contents, and then use The clustering method completes the extraction of key frames. Wherein said video is the video of N frame: F={f 1 , f 2 ,...,f N},f i Represent the video frame at time i, extract the key frame F={f in the video r1 , f r2 ,...,f rk}, and arranged in time sequence to get.

[0036] Preferably, according to the present invention, the method for detecting timing change points of a video sequence includes the following steps:

[0037] Step (1-1): Establish a sliding window model

[0038] Initialize the start frame n of video change point detection 1 = 1 and the frame length L of the corresponding sliding window 1 = L 0 ;

[0039] Step (1-2)

[0040] Carry out change point detect...

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Abstract

The invention provides an on-line extraction method of monitoring video feature frames. Under an increment sliding window technical framework, the on-line extraction method detects sequential variation points of video sub sequences and utilizes the detected variation points to segment the video into video clips containing different contents so as to utilize a clustering method to complete extraction of key frames in the obtained video clips. The on-line extraction method of monitoring video feature frames does not need any man-made preset parameters, and can realize extraction of the key frames of the monitoring video without any monitoring.

Description

technical field [0001] The invention relates to an online extraction method for monitoring video feature frames, belonging to the technical field of intelligent monitoring. Background technique [0002] Video summarization (video summarization) technology allows users to grasp the events that occurred during the observation time by browsing the video feature frames within a limited time. However, existing video frame extraction methods based on scene change and lens change detection cannot be applied to surveillance video. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the present invention provides an online extraction method for feature frames of surveillance video. Under the framework of incremental sliding-window technology, this method first detects the timing change points of the video subsequence, and uses the detected change points to divide the video into video segments with different contents, and then In the video clips, the cl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
CPCG06V20/47
Inventor 卢国梁刘阳闫鹏王亮
Owner SHANDONG UNIV