Design and Implementation of an Embedded Wireless Image Sensor Network
| Autor: | Chao-Tsu Liu, 劉肇資 |
|---|---|
| Rok vydání: | 2012 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 100 The WSN has been widely used in various applications of environmental information monitoring like of the temperature, humidity, brightness, and vibration etc., However, it is still a great challenge to transmit multimedia data in a WSN because of its low-power, low-bandwidth and low storage capacity. This thesis presents an adaptive wireless image sensor network. We propose a new communication protocol to increase the efficiency for large amount of image data transmission by using dual-protocol architecture. By implementing an embedded JPEG codec, we also provide an adaptive wireless image communication method which can be used in an un-reliable communication environment with extreme hardware resource constraints. According to the status of network bandwidth and specific monitoring requirement, the image quality is dynamically adjusted to find the balance between transmission rate and image quality. Our experiments show that our system achieves a reliable image transmission, real-time image quality adjustment and single-master/multiple-slave communication. The proposed image WSN is suitable to be applied in the small-scale distributed video surveillance with low power and hardware-constrained. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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