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Currently available pedometer applications on smartphones use either accelerometer or gyroscope sensors to calculate the number of steps walked. The main challenge with such individual sensor based approaches is that the accuracy can be impaired due to overlap in patterns when the phone is held in different modes, namely, hand (with and without swinging) and shirt pocket or pant pocket. This paper...
Location has become a key service for smartphone applications. With the help of inertial navigation unit integrated into smartphones, such as accelerometer and compass, we can provide reliable and accurate localization service, which overcomes huge energy consumption of GPS and rough location accuracy of systems based on GSM or Wi-Fi. In this paper, we present a reliable and energy-efficient localization...
This paper presents an extension to an indoor positioning system leveraging the camera which is built into current mobile phones to detect steps. Current indoor positioning systems on mobile phones based on pedestrian dead reckoning (PDR) often rely on step length and step frequency estimation. Usually the accelerometer is used to determine these values. Depending on the attitude of the device or...
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