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Foreground image separation method

A separation method and foreground image technology, which is applied in the field of foreground separation technology that is not subject to changes in illumination light, and can solve problems such as unsatisfactory foreground separation effects

Active Publication Date: 2011-03-30
IND TECH RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The current methods to solve the problem of camera automatic white balance, such as using image texture features of image edges or local binary patterns, can improve this problem to a considerable extent, but due to the characteristics of such parameters There are some complementary differences between and color parameters, so if only image texture feature parameters are used, the foreground separation effect in some cases is not ideal

Method used

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Embodiment Construction

[0020] figure 2 It is an architecture diagram of an image monitoring system according to an embodiment of the present invention. A video camera 102 continuously captures images at the front end. However, dynamic objects of various colors and brightness may enter the shooting range of the camera 102 from time to time, causing the camera 102 to adjust the exposure value and white balance parameters accordingly to maintain the image quality of the overall image. When a dynamic object appears in the input image #IN acquired by the camera 102 , the color and brightness of the background may deviate from the original value as the camera 102 automatically adjusts. This difference will cause the traditional image analyzer 110 to fail to separate the foreground and background correctly. The present invention proposes a compensation unit 200 coupled to the output end of the camera 102 to correct the background color and brightness shift caused by the camera 102 .

[0021] Generally ...

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Abstract

The invention provides a foreground image separation method. By the method, dynamic foreground and static background can be separated in continuous input images with automatic white balance or abrupt luminance change. The method comprises the following steps of: receiving an input image from a camera; performing white balance or luminance compensation on the input image according to a reference image to generate a compensation image, which has a background color and background luminance which are roughly the same as that of the reference image; and performing a background subtraction algorithm on the compensation image to generate a background separation result. The background subtraction algorithm can be a Gaussian MixtureModel-based algorithm. In the method, the images continuously input by the camera are treated, so that foreground image separation results are continuously generated and the reference image is updated according to the foreground image separation results to ensure that a monitoring system can adapt to the change of the lighting condition.

Description

technical field [0001] The invention relates to a photographic monitoring system, in particular to a foreground separation technology which is not subject to changes in illumination light. Background technique [0002] In order to maintain social order and improve the detection rate of criminal incidents, it is a necessary measure in modern society to install surveillance cameras in various public places for round-the-clock surveillance and evidence collection. Due to the huge amount of images collected, it is no longer sufficient to use only a few security personnel to meet actual needs. Therefore, using machines to initially filter surveillance videos or narrow down the scope of finding key images, and then provide personnel for confirmation is the main direction of the current video surveillance automation equipment research and development. [0003] figure 1 is a known video processing system. The main functional modules can be divided into a front-end camera 102 and ...

Claims

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Application Information

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IPC IPC(8): H04N5/272H04N7/18
Inventor 王文豪黄泰惠
Owner IND TECH RES INST
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