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Method for extracting key information frame from monitoring video

A technology for monitoring video and key information, applied in the computer field, can solve problems such as difficulty in viewing by investigators, chaotic scenes of video clips, etc., and achieve the effect of shortening the number of frames

Active Publication Date: 2015-05-13
NANJING ZHIHU INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of method pays more attention to background modeling, active object extraction, and research on active object concentration strategies. The video clips formed by the final concentration are chaotic, which brings difficulties to investigators.

Method used

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  • Method for extracting key information frame from monitoring video
  • Method for extracting key information frame from monitoring video
  • Method for extracting key information frame from monitoring video

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A method for extracting key information frames in a surveillance video, comprising the following steps:

[0029] Step 1: Mark the active frame / still frame. The first frame of the surveillance video is not marked. Starting from the second frame, mark it as an active frame or a still frame according to the brightness difference between the current frame and the previous frame. The calculation method is as follows:

[0030] d ( t ) = Σ | I i , j ( t ) - I i , j ( t - 1 ) | - - - ( 1 )

[0031] b...

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PUM

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Abstract

The invention discloses a method for extracting key information frame from a monitoring video. The method is that the video is divided into three types, namely, moving time piece, static time piece, and discontinuous moving time piece; the moving time piece contains more usable information and the frame can be extracted at relatively small intervals; the static time piece contains less usable information and the frame can be extracted at large intervals; the discontinuous moving time piece possibly contains important information and the frame containing the moving objects is pumped. According to the core technology, the monitoring video is divided into the time pieces of the three types, different frame extracting strategies are performed for the pieces of different types, and therefore, more usable information can remained while the quantity of the monitoring video frames is greatly decreased.

Description

technical field [0001] The invention relates to the field of computer technology, in particular to a method for extracting key information frames from surveillance video. Background technique [0002] In today's era, video surveillance is ubiquitous. Surveillance video has become an important boost to deter criminals and public security organs to solve cases. However, while a large amount of surveillance video brings convenience to case detection, it also brings great difficulties to video storage management and related information search. Considering that many surveillance videos contain a large number of time segments without personnel activities, these time segments contain less information useful for detection. If these time segments can be automatically identified and filtered out, it can greatly save video storage space and shorten the detection time of detectives. View the time of the video. [0003] In the past few years, there has been a lot of research work on t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/915H04N7/18
Inventor 刘德兵
Owner NANJING ZHIHU INFORMATION TECH
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