Daichi Nagata

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In daily life, lack of sleep is one of the main reasons for poor concentration. To support an effective napping, considered as one of good methods for recovering insufficient sleep and enhancing a user's concentration, we propose a hypnagogic time estimation using a heart rate sensor. Because a heart rate sensor has already been common, our method can be(More)
In this paper, we propose SakuraSensor, a participatory sensing system which automatically extracts scenic routes information from videos recorded by car-mounted smart-phones and shares the information among users in quasirealtime. As scenic routes information, we target flowering cherries along roads since the best period of flowering cherries is rather(More)
<i>SakuraSensor</i> is a participatory sensing system for collecting short videos of cherry-lined roads by in-vehicle smartphones to provide scenery-based route recommendation services for comfortable driving. To detect good cherry-lined roads and record their videos automatically during driving, image analysis techniques are performed on user's smartphone,(More)
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