An image compression transmission method for wireless video sensor network

A sensor network, image compression technology, applied in image communication, digital video signal modification, electrical components, etc., can solve the problem of lack of image quality control strategy, no consideration of node energy, etc., to reduce computational overhead and communication energy consumption, balance The effect of energy consumption

Inactive Publication Date: 2018-04-27
CHINA UNIV OF GEOSCIENCES (WUHAN)
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AI Technical Summary

Problems solved by technology

Most of the existing methods do not consider the key factor of node energy, and some of them involve the method of determining the priority of sending image data packets through the remaining energy of nodes, and there is also a lack of energy-based image quality control strategies

Method used

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  • An image compression transmission method for wireless video sensor network
  • An image compression transmission method for wireless video sensor network
  • An image compression transmission method for wireless video sensor network

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with specific examples and accompanying drawings.

[0038] An image compression transmission method for wireless video sensor networks, such as figure 1 As shown, it includes the following steps:

[0039] S1. Perform the following preprocessing on each frame of image collected from the video sensor node: divide the acquired image into a region of interest and a background region by using a motion detection algorithm based on block-based compressed sensing.

[0040] Specifically include:

[0041] 1.1. Establish a background model for motion detection based on the previous f frames of images acquired by the node:

[0042] First, each frame of image is divided into n×n sub-image blocks, and each sub-image block is arranged as an N×1 column vector, N=n×n, where n is an integer power of 2, generally 8,16 ,32, depends on the actual application; secondly, select the M×N measurement matrix, obtain the measu...

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Abstract

The present invention provides a wireless video sensor network-oriented image compression transmission method, which collects images from video sensor nodes, and uses a motion detection algorithm based on block compression sensing for each frame of image to divide the acquired image into a region of interest and a background region; The region of interest is divided into 16×16 sub-blocks, and the sparse matrix of each sub-block is obtained by Haar wavelet decomposition, which is further transformed into a 256×1 column vector; the same operation is performed on the background area, and the processed frequency is much lower than the sense Region of interest; compressed sampling is used for the column vector corresponding to each sparse block, and the compressed sampling rate is adaptively adjusted according to the remaining energy of the node; the measured value of each sparse block is packaged in a specific packet format and sent wirelessly to the receiving end. The method can adaptively adjust the image quality according to the remaining energy of the nodes, balance the energy consumption of the nodes, and is robust to the packet loss in the wireless transmission process.

Description

technical field [0001] The invention relates to the technical field of wireless sensors, in particular to an image compression transmission method for wireless video sensor networks, which is suitable for application fields such as wireless sensor network intelligent video perception, environmental monitoring and early warning. Background technique [0002] With the development of wireless sensor network technology, microprocessor technology and CMOS imaging technology, wireless video sensor network with image perception and processing capabilities has been gradually applied in many fields such as video surveillance and environmental monitoring. However, limited by energy supply, communication bandwidth, computing and storage capabilities, video sensor nodes cannot transmit large amounts of image data accurately and in real time. This seriously restricts the popularization and application of wireless video sensor network. Therefore, compressed transmission has become the fu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/167H04N19/63H04N19/42
Inventor 王勇王典洪卢倩张旭帆罗大鹏
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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