Evaluating capacitive touch input on clothes

ABSTRACT

Wearable computing and smart clothing have attracted a lot of attention in the last years. For a variety of applications, it can be seen as potential future direction of mobile user interfaces. In this paper, we concentrate on usability and applicability issues concerned with capacitive touch input on clothing. To be able to perform user studies, we built a generic platform for attaching, e.g., capacitive sensors of different types. On top of that, several prototypes of wearable accessories and clothing and implemented various application scenarios. We report on two studies we undertook with these implementations with a user group randomly sampled at a shopping mall. We provide a significant set of guidelines and lessons learned that emerged from our experiences and those studies. Thus, developers of similar projects have to put major efforts into minimizing the delay between button activation and feedback and to make location and identification of controls and their function as simple and quick as possible. Issues that have to be treated in all designs include the requirement of one-handed interaction and that, even for minimal functionality, to find a general solution with regard to layout and button-to-function mapping is hardly possible. Additionally, in order to generate a satisfactory user experience good usability must be combined with aesthetical factors.

REFERENCES

• 1: Buechley, L. A Construction Kit for Electronic Textiles. In Proc. ISWC'06. 28--32. 2006
• 2: F. Gemperle , C. Kasabach , J. Stivoric , M. Bauer , R. Martin, Design for Wearability, Proceedings of the 2nd IEEE International Symposium on Wearable Computers, p.116, October 19-20, 1998
• 3: Björn Hartmann , Scott R. Klemmer , Michael Bernstein , Leith Abdulla , Brandon Burr , Avi Robinson-Mosher , Jennifer Gee, Reflective physical prototyping through integrated design, test, and analysis, Proceedings of the 19th annual ACM symposium on User interface software and technology, October 15-18, 2006, Montreux, Switzerland [doi>10.1145/1166253.1166300]
• 4: Jaana Htinnikainen , Jussi Mikkonen , Jukka Vanhala, Button Component Encasing for Wearable Technology Applications, Proceedings of the Ninth IEEE International Symposium on Wearable Computers, p.204-205, October 18-21, 2005 [doi>10.1109/ISWC.2005.14]
• 5: Hurford, R., Martin, A., Larsen, P., Designing Wearables. In Proc. ISWC'06. 133--134. 2006
• 6: Jung, S., Lauterbach, C., Weber, W. A Digital Music Player Tailored for Smart Textiles: First Results. Avantex Symposium. 2002
• 7: Knight, J. F., Baber, C., A Tool to Assess the Comfort of Wearable Computers. Human Factors. 47(1). 77--91. 2005
• 8: Knight, J. F., Deen-Williams, D., Arvanitis, T. N., Baber, C., Sotiriou, S., Anastopoulou, S., Gargalakos, M., Assessing the Wearability of Wearable Computers. In Proc. ISWC'06. 75--82. 2006
• 9: SK Lee , William Buxton , K. C. Smith, A multi-touch three dimensional touch-sensitive tablet, Proceedings of the SIGCHI conference on Human factors in computing systems, p.21-25, April 1985, San Francisco, California, United States
• 10: Torsten Linz , Christine Kallmayer , Rolf Aschenbrenner , Herbert Reichl, Embroidering Electrical Interconnects with Conductive Yarn for The Integration of Flexible Electronic Modules into Fabric, Proceedings of the Ninth IEEE International Symposium on Wearable Computers, p.86-91, October 18-21, 2005 [doi>10.1109/ISWC.2005.19]
• 11: Yang Liu , Xiabi Liu , Yunde Jia, Hand-Gesture Based Text Input for Wearable Computers, Proceedings of the Fourth IEEE International Conference on Computer Vision Systems, p.8, January 04-07, 2006 [doi>10.1109/ICVS.2006.34]
• 12: Lombriser, C., Bharatula, N. B., Roggen, D., Tröster, G. On-Body Activity Recognition in a Dynamic Sensor Network. In Proc. BodyNets'07. 2007
• 13: Kent Lyons , Daniel Plaisted , Thad Starner, Expert Chording Text Entry on the Twiddler One-Handed Keyboard, Proceedings of the Eighth International Symposium on Wearable Computers, p.94-101, October 31-November 03, 2004 [doi>10.1109/ISWC.2004.19]
• 14: Marculescu, D., Marculescu, R., Zamora, N. H., Stanley-Marbell, P., Khosla, P. K., Park, S., Jayaraman, S., Jung, S., Lauterbach, C., Weber, W., Kirstein, T., Cottet, D., Grzyb, J., Tröster, G., Jones, M., Martin, T., Nakad, Z. Electronic Textiles: A Platform for Pervasive Computing. Proceedings of the IEEE. 91(12). 2003
• 15: Mattmann, C., Tröster, G. Design Concept of Clothing Recognizing Back Postures. In Proc. ISSS-MDBS'06. 2006
• 16: Mayol, W. W., Tordoff, B., Murray, D. W. On the Positioning of Wearable Optical Devices. Technical Report OUEL224101. Oxford University. 2001
• 17: Jane McCann , Richard Hurford , Adam Martin, A Design Process for the Development of Innovative Smart Clothing that Addresses End-User Needs from Technical, Functional, Aesthetic and Cultural View Points., Proceedings of the Ninth IEEE International Symposium on Wearable Computers, p.70-77, October 18-21, 2005 [doi>10.1109/ISWC.2005.3]
• 18: Maggie Orth , Rehmi Post , Emily Cooper, Fabric computing interfaces, CHI 98 conference summary on Human factors in computing systems, p.331-332, April 18-23, 1998, Los Angeles, California, United States [doi>10.1145/286498.286800]
• 19: Sungmee Park , Kenneth Mackenzie , Sundaresan Jayaraman, The wearable motherboard: a framework for personalized mobile information processing (PMIP), Proceedings of the 39th conference on Design automation, June 10-14, 2002, New Orleans, Louisiana, USA [doi>10.1145/513918.513961]
• 20: E. R. Post , M. Orth , P. R. Russo , N. Gershenfeld, E-broidery: design and fabrication of textile-based computing, IBM Systems Journal, v.39 n.3-4, p.840-860, July 2000
• 21: Power, E. J. T. Dias. Knitting of Electroconductive Yarns. In Proc. IEE Eurowearable '03. 55--60. 2003.
• 22: Randell, C., Wearable Computing: A Review. Technical Report CSTR-06-004. University of Bristol. 2005
• 23: J. Rantanen , T. Karinsalo , M. Mäkinen , P. Talvenmaa , M. Tasanen , J. Vanhala , N. Alfthan , J. Impiö , M. Malmivaara , R. Matala , A. Reho, Smart Clothing for the Arctic Environment, Proceedings of the 4th IEEE International Symposium on Wearable Computers, p.15, October 18-21, 2000
• 24: Bradley Rhodes , Kenji Mase, Wearables in 2005, IEEE Pervasive Computing, v.5 n.1, p.92, January 2006 [doi>10.1109/MPRV.2006.21]
• 25: Sami Ronkainen , Jonna Häkkilä , Saana Kaleva , Ashley Colley , Jukka Linjama, Tap input as an embedded interaction method for mobile devices, Proceedings of the 1st international conference on Tangible and embedded interaction, February 15-17, 2007, Baton Rouge, Louisiana [doi>10.1145/1226969.1227023]
• 26: Rukzio, E., Leichtenstern, K., Callaghan, V., Holleis, P., Schmidt, A., Shiaw-Yuan Chin, J. An Experimental Comparison of Physical Mobile Interaction Techniques: Touching, Pointing and Scanning. In Proc. Ubicomp'06, 87--104. 2006
• 27: B. H. Thomas, Minimal Social Weight User Interactions for Wearable Computers in Business Suits, Proceedings of the 6th IEEE International Symposium on Wearable Computers, p.57, October 07-10, 2002
• 28: Bruce Thomas , Karen Grimmer , Dan Makovec , Joanne Zucco , Bernard Gunther, Determination of Placement of a Body-Attached Mouse as a Pointing Input Device for Wearable Computers, Proceedings of the 3rd IEEE International Symposium on Wearable Computers, p.193, October 18-19, 1999
• 29: Toney, A., Thomas, B. H., Marais, W. Managing Smart Garments. In Proc. ISWC'06. 91--94. 2006
• 30: Eric Wade , Harry Asada, Conductive Fabric Garment for a Cable-Free Body Area Network, IEEE Pervasive Computing, v.6 n.1, p.52-58, January 2007 [doi>10.1109/MPRV.2007.8]
• 31: Wade, E., Asada, H. Wearable DC Powerline Communication Network Using Conductive Fabrics, In Proc. ICRA'04. 4085--4090. 2004
• 32: Weiser, M. The Computer for the Twenty-First Century. Scientific American. 94--10. 1991
• 33: Hendrik Witt , Tom Nicolai , Holger Kenn, The WUI-Toolkit: A Model-Driven UI Development Framework for Wearable User Interfaces, Proceedings of the 27th International Conference on Distributed Computing Systems Workshops, p.43, June 22-29, 2007 [doi>10.1109/ICDCSW.2007.80]

INDEX TERMS

Primary Classification:
  H. Information Systems
  H.5 INFORMATION INTERFACES AND PRESENTATION (I.7)
      H.5.2 User Interfaces (D.2.2, H.1.2, I.3.6)

Additional Classification:
  B. Hardware
  B.4 INPUT/OUTPUT AND DATA COMMUNICATIONS
      B.4.2 Input/Output Devices

  H. Information Systems
  H.1 MODELS AND PRINCIPLES
      H.1.2 User/Machine Systems

General Terms:
Design, Experimentation, Human Factors

Keywords:
capacitive touch, design guidelines, input on textiles, wearable controls