Distributed image transmission method oriented to wireless multimedia sensor network

Abstract

The invention relates to a distributed image transmission method oriented to a wireless multimedia sensor network, which is designed to solve the problem that limited resources cannot be fully utilized because the resources of the wireless multimedia sensor network are seriously limited and the energy consumption stresses of nodes are not balanced. The method takes a concurrent computation concept as a basis and is based on the high-efficiency energy-saving distributed image compression algorithm of JPEG2000. During clustering, the algorithm introduces a node campaign factor and a communication cost function, self-adaptive optimal distribution of compression bit rates is conducted to an image block according to the gradient magnitude of an image and finally data information molecule bandsafter wavelet transformation in an image compression process are separately coded. The distributed image transmission method oriented to the wireless multimedia sensor network has the characteristicsand the advantages that on the premise that image quality is guaranteed, the large-size high-resolution image transmission is realized in the wireless multimedia sensor network with seriously limitedresources at low energy consumption and in load balance, the energy consumption stresses of camera nodes can be greatly relieved, the image acquisition and compression energy consumption stresses of a cluster-head node layer can be decomposed to a redundantly-deployed common node layer through the cooperation between the common node layers and the cluster-head node layer, the energy consumed by the cluster-head node layer can be effectively decreased by 25 percent in each turn, at the same time, the energy consumption of network nodes can be greatly balanced and the lifecycle of the network is prolonged by 15 percent.

Description

technical field [0001] The invention relates to an image transmission method, in particular to a distributed image transmission method oriented to a wireless multimedia sensor network. Background technique [0002] With the development of hardware technology, the emergence of cheap CMOS cameras and microphones, and the urgent need for image, audio and video data with rich information of the monitored objects, led to the emergence of wireless multimedia sensor networks (WMSNs). WMSNs is a distributed sensing network composed of a group of multimedia sensor nodes with computing, storage and communication capabilities. It is generally deployed in an unattended environment to complete specified tasks autonomously. It is an energy-sensitive non-infrastructure network. Typical WMSNs are generally composed of multimedia sensor nodes, aggregation nodes, and base stations. It senses various media (audio, video, image, value, etc.) The mode is transmitted to the sink node, so as to r...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the energy consumption pressure of each node is unbalanced due to the severe limitation of wireless multimedia sensor network resources, the limited resources cannot be fully utilized, and according to the characteristics of WMSNs topology, a wireless multimedia sensor oriented The distributed image transmission method of the network, which is based on the idea of ​​parallel computing, based on the distributed image transmission of JPEG2000, adopts the structure that divides the nodes into ordinary node layer and camera node layer, and its steps are as follows:

Images