Image compression transmission method facing wireless video sensor network

A sensor network, image compression technology, applied in image communication, digital video signal modification, electrical components and other directions, can solve the problem of not considering node energy, lack of image quality control strategy, etc., to reduce computing overhead and communication energy consumption, balance The effect of energy consumption

Inactive Publication Date: 2016-03-30
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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  • Image compression transmission method facing wireless video sensor network
  • Image compression transmission method facing wireless video sensor network
  • Image compression transmission method facing 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 invention provides an image compression transmission method facing a wireless video sensor network, comprising steps of collecting images from a video sensor node, performing motion detection algorithm on each frame of the image based on partition compressed sensing to classify the obtained image as an interested area or a background area, dividing the interested area into 16*16 sub-blocks, obtaining a sparse matrix of each sub-block through Haar wavelet decomposition, converting the sparse matrix to the 256*1 column vector, performing the same operation on the background area, wherein the processed frequency is greatly lower than the processed frequency of the interested area, using the compression sampling on the column vector corresponding to each sparse block, adaptively regulating the compression sampling rate according to left energy of the node, packing the measurement value of each sparse block according to a certain format and transmitting the measurement value to the reception terminal in a wireless manner. The invention can adaptively regulate the image quality according to the left energy of the node, balance the node energy consumption, and has robustness on the data pack loss in the wireless transmission.

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 Applications(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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