Dong-FuelPrices - Automatic Collection of Fuel Prices from...

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Unformatted text preview: Automatic Collection of Fuel Prices from a Network of Mobile Cameras Y.F. Dong 1 , S. Kanhere 1 , C.T. Chou 1 , and N. Bulusu 2 1 School of Computer Science & Engineering, University of New South Wales, Sydney, Australia, {ydon,salilk,ctchou}@cse.unsw.edu.au 2 Department of Computer Science, Portland State University, USA, nbulusu@cs.pdx.edu Abstract. It is an undeniable fact that people want information. Unfor- tunately, even in todays highly automated society, a lot of the informa- tion we desire is still manually collected. An example is fuel prices where websites providing fuel price information either send their workers out to manually collect the prices or depend on volunteers manually relay- ing the information. This paper proposes a novel application of wireless sensor networks to automatically collect fuel prices from camera images of road-side price board (billboard) of service (or gas) stations. Our sys- tem exploits the ubiquity of mobile phones that have cameras as well as users contributing and sharing data. In our proposed system, cameras of contributing users will be automatically triggered when they get close to a service station. These images will then be processed by computer vision algorithms to extract the fuel prices. In this paper, we will de- scribe the system architecture and present results from our computer vision algorithms. Based on 52 images, our system achieves a hit rate of 92.3% for correctly detecting the fuel price board from the image back- ground and reads the prices correctly in 87.7% of them. To the best of our knowledge, this is the first instance of a sensor network being used for collecting consumer pricing information. Key words: Automatic data collection, Computer-vision-based sensing, Consumer pricing information gathering, Participatory sensor networks, Vehicular sensor networks 1 Introduction The technology of wireless sensor networks (WSNs) has been applied to a plethora of application domains, e.g., farming [1], structure monitoring [2], military [3], environmental monitoring [4], home health care [5], home environment control [6] etc. In this paper, we propose a novel application of using WSN to automat- ically collect prices of fuel 3 from still images of road-side price board of service 3 Unfortunately, different parts of the English speaking world use different words to refer to fuel for automobiles. In North America, it is commonly known as gasoline while it is called petrol in the United Kingdom and Australia. We have chosen to use fuel in this paper to avoid bias towards a particular community. stations. To the best of our knowledge, this is the first instance of a WSN being used for collecting consumer pricing information....
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Dong-FuelPrices - Automatic Collection of Fuel Prices from...

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