Video background extraction method based on weighted sample

A technology of background extraction and samples, which is applied in the field of moving target detection technology based on visual background extraction, can solve the problems of increasing computer memory, large background image noise, and increased number of samples, etc., and achieves less memory consumption, enhanced expression ability, and reduced updates Effect

Active Publication Date: 2017-06-16
SOUTHEAST UNIV
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Problems solved by technology

At the same time, the video is growing explosively every day, which will bring several serious problems to people: if the storage hardware is increased, the equipment cost will be seriously increased; and attention is limited), which will increase the cost of
[0004] The existing sample-based background modeling methods usually result in high noise in the processed background image due to untimely updates, and the increase in the number of samples will increase the memory of the computer

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  • Video background extraction method based on weighted sample
  • Video background extraction method based on weighted sample
  • Video background extraction method based on weighted sample

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the embodiments and the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0036] figure 1 For the overall flow of a weighted sample-based video background extraction method of the invention, the method of the present invention performs background detection on video images according to the following steps:

[0037] Step 1: Read in the video file, and the size of each frame of the read video image is M×N×L, where M and N represent the number of rows and columns of the image matrix to be read in, where M and N are both positive integers, and L represents The number of channels of the read-in image, L=1 or 3, when L=1 means that the read-in image is a single-channel, that is, a grayscale image, when L=3 means that the read-in image is a three-...

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Abstract

The invention discloses a video background extraction method based on a weighted sample. Step one, a video image is read in; step two, background modeling is performed on the read-in image, and the model is initialized if the read image is a first frame, or background detection is performed; step three, if the current pixel is a background pixel, background updating is randomly performed; and step four, a background image is acquired and the image is saved. According to the video background extraction method based on the weighted sample, sample updating is performed by using the weight of the sample and an "activity" sample so that error updating of effective samples can be reduced and the expression capability of the model can be enhanced. The use amount of the samples can be reduced and the calculation efficiency can be enhanced under the premise of guaranteeing the background detection accuracy so that the cost of video background extraction can be reduced, the real-time performance is better and the range of application is wide.

Description

technical field [0001] The invention belongs to the field of image processing and video detection, and relates to a moving target detection technology based on visual background extraction. Background technique [0002] With the continuous development of science and technology, camera and monitoring equipment has achieved rapid technological improvement and widespread popularization. This greatly meets the needs of people's daily life, and also provides a security guarantee for people's production and life. At the same time, the video is growing explosively every day, which will bring several serious problems to people: if the storage hardware is increased, the equipment cost will be seriously increased; and attention is limited), which will result in an increase in cost. Therefore, automatic detection of moving objects is inevitable for technological development. This will help to further identify and recognize the target of interest, and will also greatly reduce the cos...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
CPCG06V20/49
Inventor 路小波姜胜芹
Owner SOUTHEAST UNIV
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