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Method for matching pursuit of pedestrian target under illumination environment change condition

A technology of environment change and pedestrian target, applied in the field of video surveillance

Inactive Publication Date: 2012-07-18
XIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a pedestrian target matching and tracking method under the condition of changing lighting environment, to solve the problem of improving the accuracy of pedestrian target matching and tracking in the prior art when the lighting environment is complex and the intensity changes greatly

Method used

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  • Method for matching pursuit of pedestrian target under illumination environment change condition
  • Method for matching pursuit of pedestrian target under illumination environment change condition
  • Method for matching pursuit of pedestrian target under illumination environment change condition

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Embodiment

[0130] in such as figure 2 In the shown scene, it is assumed that the pedestrian wearing a floral skirt is the target to be tracked. image 3 is the target fiducial template obtained from the first frame, Figure 4 In order to track the same target area within the field of view under the influence of strong light, the figure shows 10 screenshots of tracking target photos under different light brightness conditions. Figure 5 for right Figure 4 The fluctuation curve of the similarity measurement distance obtained by several comparison methods for the target. It can be seen from the fluctuation curve that the method of the present invention has the smallest fluctuation under different lighting environments.

[0131] To sum up, the method of the present invention is, according to the Retinex principle, obtain the reflection component of the target area, reduce the impact of the lighting environment; then through color transfer, further reduce the impact of the lighting envir...

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Abstract

The invention discloses a method for the matching pursuit of a pedestrian target under an illumination environment change condition. The method is implemented specifically by the following steps of: determining the characteristic range of the target; extracting a reflection component of a target area on the basis of a Retinex principle; performing color transfer correction on the target area; performing characteristic extraction on a target reference template and a target to be matched; calculating a characteristic resemblance distance between the target to be matched and a target reference; and finally performing matching pursuit judgment on the pedestrian target. According to the method, the Retinex principle is utilized, and the color transfer correction is realized, so that the influence of an illumination environment change on the color characteristics of the target is lowered; the pedestrian target is divided into an upper half body and a lower half body, and the color characteristics of the pedestrian target are calculated, so that the influence of the posture change of the pedestrian target when the pedestrian target walks on the color characteristics of the target is lowered; and by the weighted fusion matching of a plurality of characteristics, the accuracy of the matching pursuit of the pedestrian target in an illumination intensity change environment is improved.

Description

technical field [0001] The invention belongs to the technical field of video monitoring, and relates to a pedestrian target matching and tracking method under the condition of changing illumination environment. Background technique [0002] Moving target tracking is the most important part of an intelligent surveillance system. However, in the existing technology, when the light intensity changes in an environment, it is difficult to correctly match and track the moving target. [0003] For the pedestrian target matching and tracking method under the fixed camera mode and the environment with changing light intensity, it is generally realized by extracting the light invariant factor. However, when the lighting environment is complex, the extraction of lighting invariant factors is mostly based on the description of the approximate model. Therefore, when the lighting intensity changes greatly, especially for pedestrians who are dressed in complex colors, due to their color di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/20
Inventor 朱虹独盟盟范彩霞王栋邢楠
Owner XIAN UNIV OF TECH
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