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Foreground detection method and device

A technology of foreground detection and foreground map, which is applied in the field of image processing, can solve the problems of reduced accuracy, more useful information, and loss of foreground target images, so as to prevent information loss and improve accuracy

Active Publication Date: 2019-03-22
北京君正集成电路股份有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] The existing three-frame difference algorithm uses binarization processing to compare the background model with the current image, and the obtained foreground target image loses more useful information, resulting in a decrease in detection accuracy

Method used

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Embodiment Construction

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is only some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0043] An embodiment of the present invention provides a foreground detection method, such as figure 1 As shown, the method includes:

[0044] Step S11 , setting the threshold T and update rate alpha used for background update.

[0045] Step S12, extracting the first frame image frame(0) of the video image to be detected as the background m...

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Abstract

The invention provides a foreground detection method and a device. The method comprises the following steps: step S11, setting a threshold value and an update rate used when updating a background; 12,extracting that first frame image of the video image to be detected as a background model; 13, separating three channels of each frame of that video image to be detect, and executing steps S14 to S16for each channel respectively; step 14, that correspondence between the current frame and the first two frame is respectively made difference, and the obtained value is compare with the threshold value to obtain a non-moving area; Step S15, using the non-moving area obtained in step S14 as a mask, updating the current image into the background to obtain a new background image; Step S16, subtracting the current image from the new background image to obtain a corresponding foreground map; Step S17, for each of the three channels, operating the foreground map obtained in step S16 i again to obtain the final foreground map. The invention can improve the accuracy of foreground detection.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to a foreground detection method and device. Background technique [0002] Currently, video surveillance systems are widely used. The intelligent video monitoring system adopts image processing, pattern recognition and computer vision technology. By adding an intelligent video analysis module to the monitoring system, it can automatically analyze and identify video images with the help of powerful computer data processing capabilities, so as to realize fully automatic and real-time monitoring. Intelligent system has important practical application significance. [0003] Foreground detection is one of the core technologies of intelligent video surveillance system. The so-called foreground detection refers to extracting the area corresponding to the moving target from the video image sequence. For example, for specific traffic monitoring, it is to extract the pedest...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/194G06T7/11G06T5/50
CPCG06T5/50G06T7/11G06T7/194G06T2207/20224G06T2207/10016
Inventor 余慧
Owner 北京君正集成电路股份有限公司