Abstract
In evaluating and analysing a pervasive computing system, it is common to log system use and to create video recordings of users. A lot of data will often be generated, representing potentially long periods of user activity. We present a procedure to identify sections of such data that are salient given the current context of analysis; for example analysing the activity of a particular person among many trial participants recorded by multiple cameras. By augmenting the cameras used to capture a mobile experiment, we are able to establish both a location and heading for each camera, and thus model the field of view for each camera over time. Locations of trial participants are also recorded and compared against camera views, to determine which periods of user activity are likely to have been recorded in detail. Additionally the stability of a camera can be tracked and video can be subsequently filtered to exclude footage of unacceptable quality. These techniques are implemented in an extension to Replayer: a software toolkit for use in the development cycle of mobile applications. A report of initial testing is given, whereby the technique’s use is demonstrated on a representative mobile application.
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Aizawa, K., Ishijima, K., Shiina, M.: Summarizing Wearable Video. In: Proceedings of International Conference on Image Processing, Thessaloniki, Greece, pp. 398–401 (2001)
Badre, A.N., et al.: A User Interface Evaluation Environment Using Synchronized Video, Visualizations and Event Trace Data. Software Quality Journal 4(2) (1995)
Barkhuus, L., Chalmers, M., Hall, M., et al.: Picking Pockets on the Lawn: The Development of Tactics and Strategies in a Mobile Game. In: Beigl, M., et al. (eds.) UbiComp 2005. LNCS, vol. 3660, pp. 358–374. Springer, Heidelberg (2005)
Becker, R.A., Cleveland, W.S.: Brushing Scatterplots. Technometrics 29, 127–142 (1987)
Beeharee, A., Steed, A.: Filtering Location-Based Information Using Visibility. In: Proceedings of Location- and Context-Awareness, Munich, Germany, pp. 306–315 (2005)
Bell, M., Chalmers, M., Barkhuus, L., et al.: Interweaving Mobile Games with Everyday Life. In: Proc. ACM CHI, Montreal, pp. 417–426 (2006)
Chalmers, M., Galani, A.: Seamful Interweaving: Heterogeneity in the Theory and Design of Interactive Systems. In: Proceedings of ACM Symposium on Designing Interactive Systems (DIS 2004), Massachusetts, USA, pp. 243–252 (2004)
Yamasaki, T., et al.: Person Tracking and Multicamera Video Retrieval Using Floor Sensors in a Ubiquitous Environment. In: Leow, W.-K., et al. (eds.) CIVR 2005. LNCS, vol. 3568, pp. 297–306. Springer, Heidelberg (2005)
French, A., et al.: Software Replay Tools for Time-based Social Science Data. Presented at the 2nd International Conference on e-Social Science, Manchester (2006)
Hughes, S., Oakley, I., O’Modhrain, S.: MESH: Supporting Mobile Multi-modal Interfaces. Presented at the Seventeenth Annual ACM Symposium on User Interface Software and Technology (UIST 2004), Santa Fe, New Mexico, USA (2004)
McCurdy, N.J., Carlisle, J.N., Griswold, W.G.: Harnessing Mobile Ubiquitous Video. In: Proceedings of the ACM Conference on Human Factors in Computing (CHI2005), Portland, Oregon, USA, pp. 1645–1648 (2005)
Morrison, A., Tennent, P., Chalmers, M.: Coordinated Visualisation of Video and System Log Data. In: Proceedings of the Fourth International Conference on Coordinated & Multiple Views in Exploratory Visualization (CMV2006), London, UK, pp. 91–102 (2006)
Sawahata, Y., Aizawa, K., Bakker, E.M., et al.: Indexing of Personal Video Captured by a Wearable Imaging System. In: Bakker, E.M., Lew, M., Huang, T.S., Sebe, N., Zhou, X.S. (eds.) CIVR 2003. LNCS, vol. 2728, pp. 342–351. Springer, Heidelberg (2003)
Tennent, P., Chalmers, M.: Recording and Understanding Mobile People and Mobile Technology. In: Proceedings of the First International Conference on e-Social Science, Manchester, UK (2005)
Titterton, D.H., Weston, J.L.: Strapdown Inertial Navigation Technology, 2nd edn. The Institution of Electrical Engineers (2004)
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Morrison, A., Tennent, P., Williamson, J., Chalmers, M. (2007). Using Location, Bearing and Motion Data to Filter Video and System Logs. In: LaMarca, A., Langheinrich, M., Truong, K.N. (eds) Pervasive Computing. Pervasive 2007. Lecture Notes in Computer Science, vol 4480. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-72037-9_7
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DOI: https://doi.org/10.1007/978-3-540-72037-9_7
Publisher Name: Springer, Berlin, Heidelberg
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