The problem of localization in wireless sensor networks where nodes do not use ranging hardware remains a challenging problem, when considering the required location accuracy, energy expenditure and the duration of the localization phase. This paper proposes a framework, called StarDust, for wireless sensor network localization based on passive optical components. In the StarDust framework, sensor nodes are equipped with optical retro-reflectors. An aerial device projects light towards the deployed sensor network, and records an image of the reflected light. An image processing algorithmis developed for obtaining the locations of sensor nodes.
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