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Nektarios Paisios

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Publications by Nektarios Paisios (bibliography)

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2011
 
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Paisios, Nektarios, Rubinsteyn, Alex, Vyas, Vrutti and Subramanian, Lakshminarayanan (2011): Recognizing currency bills using a mobile phone: an assistive aid for the visually impaired. In: Proceedings of the 2011 ACM Symposium on User Interface Software and Technology 2011. pp. 19-20.

Despite the rapidly increasing use of credit cards and other electronic forms of payment, cash is still widely used for everyday transactions due to its convenience, perceived security and anonymity. However, the visually impaired might have a hard time telling each paper bill apart, since, for example, all dollar bills have the exact same size and, in general, currency bills around the world are not distinguishable by any tactile markings. We propose the use of a broadly available tool, the camera of a smart-phone, and an adaptation of the SIFT algorithm to recognize partial and even distorted images of paper bills. Our algorithm improves memory efficiency and the speed of SIFT key-point classification by using a k-means clustering approach. Our results show that our system can be used in real-world scenarios to recognize unknown bills with a high accuracy.

© All rights reserved Paisios et al. and/or ACM Press

 
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Paisios, Nektarios, Rubinsteyn, Alex, Subramanian, Lakshminarayanan, Tierney, Matt and Vyas, Vrutti (2011): Tracking indoor location and motion for navigational assistance. In: Proceedings of the 2011 ACM Symposium on User Interface Software and Technology 2011. pp. 83-84.

Visually impaired people have a harder time remembering their way around complex unfamiliar buildings, whilst obtaining the help of a sighted guide is not always possible or desirable. By sensing the users location and motion, however, mobile phone software can provide navigational assistance in such situations, obviating the need of human guides. We present a simple to operate and highly usable mobile navigational guide that uses Wi-Fi and accelerometer sensors to help the user repeat paths that were already walked once.

© All rights reserved Paisios et al. and/or ACM Press

 
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Changes to this page (author)

05 Apr 2012: Added
05 Apr 2012: Modified

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Page maintainer: The Editorial Team
URL: http://www.interaction-design.org/references/authors/nektarios_paisios.html
Jul 13

A general principle for all user interface design is to go through all of your design elements and remove them one at a time. If the design works as well without a certain design element, kill it.

-- Jakob Nielsen, Designing Web Usability, p. 22.

 
 

Featured chapter

Marc Hassenzahl explains the fascinating concept of User Experience and Experience Design. Commentaries by Don Norman, Eric Reiss, Mark Blythe, and Whitney Hess

User Experience and Experience Design !

 
 

Our Latest Books

Kumar and Herger 2013: Gamification at Work: Designing Engaging Business Software...
by Janaki Mythily Kumar and Mario Herger

 
Start reading

Whitworth and Ahmad 2013: The Social Design of Technical Systems: Building technologies for communities...
by Brian Whitworth and Adnan Ahmad

 
Start reading

Soegaard and Dam 2013: The Encyclopedia of Human-Computer Interaction, 2nd Ed....
by Mads Soegaard and Rikke Friis Dam

 
Start reading
 
 

Help us help you!