LiTu - A Human-Computer Interface based on Frustrated Internal Reflection of Light

Hdl Handle:
http://hdl.handle.net/10034/584274
Title:
LiTu - A Human-Computer Interface based on Frustrated Internal Reflection of Light
Authors:
Edwards, Marc R.; John, Nigel W.
Abstract:
We have designed LiTu (Laɪ’Tu - Light Tube) as a customisable and low-cost (ca 30 Euros) human-computer interface. It is composed of an acrylic tube, a ball-bearing mirror, six LEDs and a webcam. Touching the tube causes frustrated internal reflection of light due to a change in the critical angle at the acrylic-skin boundary. Scattered light within the tube is reflected off the mirror into the camera at the opposite end for image processing. Illuminated contact regions in the video frames are segmented and processed to generate 2D information such as: pitch and volume, or x and y coordinates of a graphic. We demonstrate the functionality of LiTu both as a musical instrument and as an interactive computer graphics controller. For example, various musical notes can be generated by touching specific regions around the surface of the tube. Volume can be controlled by sliding a finger down the tube and pitch by sliding the finger radially. We demonstrate the adaptable nature of LiTu’s touch interface and discuss our plans to explore future physical modifications of the device.
Affiliation:
University of Chester
Citation:
Edwards, M. R., & John, N. W. (2015). LiTu - A human-computer interface based on frustrated internal reflection of light. 2015 International Conference on Cyberworlds (CW), 2015, pp. 237-239, doi:10.1109/CW.2015.69
Publisher:
IEEE Conference Publications
Journal:
International Conference on Cyberworlds 2015
Publication Date:
Oct-2015
URI:
http://hdl.handle.net/10034/584274
DOI:
10.1109/CW.2015.69
Additional Links:
https://www.computer.org/csdl/proceedings/cw/2015/9403/00/9403a237-abs.html
Type:
Meetings and Proceedings
Language:
en
Appears in Collections:
Computer Science

Full metadata record

DC FieldValue Language
dc.contributor.authorEdwards, Marc R.en
dc.contributor.authorJohn, Nigel W.en
dc.date.accessioned2015-12-21T11:17:16Zen
dc.date.available2015-12-21T11:17:16Zen
dc.date.issued2015-10en
dc.identifier.citationEdwards, M. R., & John, N. W. (2015). LiTu - A human-computer interface based on frustrated internal reflection of light. 2015 International Conference on Cyberworlds (CW), 2015, pp. 237-239, doi:10.1109/CW.2015.69en
dc.identifier.doi10.1109/CW.2015.69en
dc.identifier.urihttp://hdl.handle.net/10034/584274en
dc.description.abstractWe have designed LiTu (Laɪ’Tu - Light Tube) as a customisable and low-cost (ca 30 Euros) human-computer interface. It is composed of an acrylic tube, a ball-bearing mirror, six LEDs and a webcam. Touching the tube causes frustrated internal reflection of light due to a change in the critical angle at the acrylic-skin boundary. Scattered light within the tube is reflected off the mirror into the camera at the opposite end for image processing. Illuminated contact regions in the video frames are segmented and processed to generate 2D information such as: pitch and volume, or x and y coordinates of a graphic. We demonstrate the functionality of LiTu both as a musical instrument and as an interactive computer graphics controller. For example, various musical notes can be generated by touching specific regions around the surface of the tube. Volume can be controlled by sliding a finger down the tube and pitch by sliding the finger radially. We demonstrate the adaptable nature of LiTu’s touch interface and discuss our plans to explore future physical modifications of the device.en
dc.language.isoenen
dc.publisherIEEE Conference Publicationsen
dc.relation.urlhttps://www.computer.org/csdl/proceedings/cw/2015/9403/00/9403a237-abs.htmlen
dc.subjectHCIen
dc.subjectfrustrated internal reflectionen
dc.titleLiTu - A Human-Computer Interface based on Frustrated Internal Reflection of Lighten
dc.typeMeetings and Proceedingsen
dc.contributor.departmentUniversity of Chesteren
dc.identifier.journalInternational Conference on Cyberworlds 2015en
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