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Multimodality automatic updating and replacing background modeling method

A technology of background modeling and automatic update, which is applied to the parts of color TV, parts of TV system, image data processing, etc., and can solve the problem of low adaptability

Inactive Publication Date: 2010-07-14
XIAN UNIV OF TECH
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a multi-modal automatic update and replacement background modeling method, which solves the problem that the existing background modeling method has low adaptability to sudden changes in the environment

Method used

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  • Multimodality automatic updating and replacing background modeling method
  • Multimodality automatic updating and replacing background modeling method
  • Multimodality automatic updating and replacing background modeling method

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Embodiment Construction

[0063] The present invention will be described in detail below in combination with specific embodiments.

[0064] The background modeling method for multi-modal automatic update and replacement of the present invention is specifically implemented according to the following steps:

[0065] Step 1: Modeling of main and auxiliary backgrounds

[0066] The main background modeling is implemented according to the following steps:

[0067] a. Initialization of the main background model

[0068] When the system starts, it first enters the background learning stage, and takes N consecutive frames of video for background learning. The size of N depends on the moving speed of the moving object in the N frames. It is required that in the sequence of video frames, each pixel is not blocked by the moving object. The number of frames accounts for 98% of the total number of frames. At this time, there is no need to specifically eliminate moving targets, and the initial value B of the main b...

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Abstract

The invention discloses a multimodality automatic updating and replacing background modeling method which comprises the following steps: firstly, carrying out modeling of a main background and an auxiliary background, wherein the modeling of the main background is carried out by the following steps: initializing a main background model, modifying the main background model, and updating threshold; and the modeling of the auxiliary background is carried out by the following steps: establishing an alternate auxiliary background sequence, counting classified data, and updating the threshold of the auxiliary background model; and then computing the background to be updated, and determining the background to replace the auxiliary background according to the occurring frequency of the background to be updated. The method of the invention adopts a multimodality updating and replacing design concept, adopts various modalities to form a vector to carry out the modeling of the background, and finishes background adaptation to the change of ambient lighting through continuous updating and replacing among the modalities. The background modeling method of the invention is suitable for an intelligent monitoring system, and adopts a background differential method for detecting a moving target.

Description

technical field [0001] The invention belongs to the technical field of video surveillance, and relates to a background modeling method for video moving target detection, in particular to a background modeling method for multi-mode automatic update and replacement. Background technique [0002] Moving target detection is the most critical link in the target behavior analysis in the intelligent monitoring system. Considering the uncertainty of the moving direction and speed of the moving target in the monitoring field of view, the background difference method is usually used to complete the detection of the moving target. . However, the effect of using the background subtraction method to detect moving objects depends on whether the background model is effective. Because in the background, although the scenery does not change, the ambient lighting will change unpredictablely. In addition to the slow natural lighting changes, there are also sudden changes such as clouds passin...

Claims

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Application Information

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IPC IPC(8): G06T7/20H04N5/14
Inventor 朱虹马文庆王栋孟凡星邢楠刘薇
Owner XIAN UNIV OF TECH
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