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Theme mining and behavior analysis method for video moving target

A moving target and behavior analysis technology, applied in the field of image processing, can solve the problem of inability to accurately describe the key summary information such as the target's moving behavior, and achieve the effect of accurate capture

Active Publication Date: 2021-02-09
CHINASO INFORMATION TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

Although the invention discloses a video summary generation method based on target detection, this method only recognizes the target in the entire video and then clusters to obtain a summary, and cannot accurately describe key summary information such as the target movement behavior in a video

Method used

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  • Theme mining and behavior analysis method for video moving target
  • Theme mining and behavior analysis method for video moving target
  • Theme mining and behavior analysis method for video moving target

Examples

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Embodiment 1

[0058] Embodiment 1, a method for topic mining and behavior analysis of video moving objects, such as figure 1 shown, including the following steps:

[0059] S1) obtain video frame sequence, extract the characteristic matrix Y of video frame sequence, comprise the following steps:

[0060] S11) Obtain the video frame sequence I(x, y, t) that contains the movement of the video moving target, and divide the video frame sequence I(x, y, t) into N video frame segments, where x and y respectively represent the The x-coordinate and y-coordinate of , t represents time;

[0061] S12) Gaussian convolution is performed on the video frame sequence I(x, y, t), and the Gaussian convolution result of the video frame sequence I(x, y, t) is obtained where σ 2 ,τ 2 are the variances of the spatial and temporal dimensions of the video frame sequence I(x,y,t) respectively, and f(·) is the mapping function that maps the video frame sequence I(x,y,t) to the corresponding pixels in the image s...

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Abstract

The invention relates to the field of image processing, and discloses a theme mining and behavior analysis method for a video moving target, and the method comprises the following steps: S1), obtaining a video frame sequence, and extracting a feature matrix of the video frame sequence; s2) performing topic mining by utilizing the feature matrix to obtain a topic matrix; and S3) performing behavioranalysis on the video frame sequence by using the topic matrix to obtain a behavior category of the video moving target. According to the invention, the image area with significant change in the video frame is extracted, the video expression is further constructed, and the motion attribute of the target in the video can be accurately captured. Besides, a streaming-based non-negative matrix factorization algorithm is adopted, a solving function is optimized by utilizing a weight matrix and a constraint condition, a theme abstract is mined, and time correlation information between video framesis expressed more accurately. The invention further provides a behavior multi-classification model based on the double-flow convolutional network, behavior labels for the mined topics are obtained, and the classification accuracy is improved.

Description

technical field [0001] The invention relates to the field of image processing, in particular to a subject mining and behavior analysis method for video moving objects. Background technique [0002] In recent years, with the rapid development of the Internet, a large amount of video information has gradually become an important medium for people to perceive external things, such as live broadcast platforms, monitoring streams, etc. Due to the complexity of scenes and content targets in the video and the length of the video, and the video itself cannot provide an overview like text, and the video itself also contains a large amount of redundant blank information, it is difficult for people to efficiently analyze a video source in a short period of time. Analysis requires a lot of manpower and time. Generally, when the main target in the video is in motion, it can better reflect the information of the video itself. Therefore, how to accurately mine the target and motion attrib...

Claims

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Application Information

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IPC IPC(8): G06K9/00G06K9/46G06K9/62G06N3/04
CPCG06V20/42G06V10/464G06V10/50G06N3/045G06F18/253
Inventor 滕辉龙飞
Owner CHINASO INFORMATION TECH
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