Interacting with mobile services: an evaluation of camera-phones and visual tags |
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Authors: | Eleanor Toye Richard Sharp Anil Madhavapeddy David Scott Eben Upton Alan Blackwell |
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Affiliation: | (1) Intel Research Cambridge, Cambridge, UK;(2) Computer Laboratory, Cambridge University, 15 JJ Thomson Avenue, Cambridge, CB3 0FD, UK |
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Abstract: | We present a study of using camera-phones and visual-tags to access mobile services. Firstly, a user-experience study is described in which participants were both observed learning to interact with a prototype mobile service and interviewed about their experiences. Secondly, a pointing-device task is presented in which quantitative data was gathered regarding the speed and accuracy with which participants aimed and clicked on visual-tags using camera-phones. We found that participants’ attitudes to visual-tag-based applications were broadly positive, although they had several important reservations about camera-phone technology more generally. Data from our pointing-device task demonstrated that novice users were able to aim and click on visual-tags quickly (well under 3 s per pointing-device trial on average) and accurately (almost all meeting our defined speed/accuracy tradeoff of 6% error-rate). Based on our findings, design lessons for camera-phone and visual-tag applications are presented. |
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