Image Transmission Over ZigBee-Based Wireless Sensor Networks
A common greenhouse application uses a small camera to monitor a particular plant of interest. Because of resource constraints in the sensor nodes, digital image transmission is a challenge for image-sensor-based wireless sensor networks (WSNs). A useful design and implementation of a wireless image sensor network with low costs, low power, and based on a low rate ZigBee protocol is presented. The WSN hardware platform and acquisition software use a simple best effort protocol to transmit JPEG images over a ZigBee network. However, image quality can be degraded by image distortion during transmission due to packet losses and poor link quality. A Canny edge detector algorithm is therefore used to recognize a distorted image, and then the system retransmits the image automatically. In the experiments, the recognition rate for identification of image distortion with mosaic blocks reached up to 90% using our proposed algorithm. Experimental results show that the performance of the WSN platform is reliable.
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Document Type: Research Article
Publication date: 2012-01-01
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