Abstract
We present a new technique for approximating handwritten traces sampled from a digital graphics tablet, via a digital pen, during a computer presentation. Our goal is not only to maintain the personal style and flair of the encoded handwriting, but also to provide an efficient and practical approximation of the handwritten traces that does not deteriorate when resized at arbitrary scales. We adopt known polyline simplification algorithms and utilize second-order rational Bézier curves in our “active” methodologies. The proposed active smoothing algorithm solves its task while data is still being received.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsPreview
Unable to display preview. Download preview PDF.
References
Douglas, D.H., Peucker, T.K.: Algorithms for the reduction of the number of points required to represent a digitized line or its caricature. Cartographica: The International Journal for Geographic Information and Geovisualization 10(2), 112–122 (1973)
Hasso Plattner Institut, Potsdam, Germany, http://www.tele-task.de/
Hershberger, J., Snoeyink, J.: Speeding up the douglas-peucker line simplification algorithm. Tech. rep., University of British Columbia, Vancouver, BC, Canada, Canada (1992)
Holfelder, W.: MBone VCR - Video Conference Recording on the MBone. In: Proceedings of ACM Multimedia 1995, pp. 237–238. ACM, New York (1995)
IMC AG, Saarbrücken, Germany, http://www.lecturnity.de/de/lecturnity/uebersicht/
Institut für Informatik, Technische Fakultät, Universität Freiburg, http://electures.informatik.uni-freiburg.de/portal/web/guest/home
Lauer, T., Trahasch, S.: Begriffsbesprechung: Vorlesungsaufzeichnung. i-com – Zeitschrift für interaktive und kooperative Medien 4, 61 (2005)
Mohamed, K.A.: Concepts and Solutions for Efficient Handling of the Digital Ink, Ph.D. dissertation, Freiburg (2009), http://www.freidok.uni-freiburg.de/volltexte/7361/
Opheim, H.: Smoothing a digitized curve by data reduction methods. In: Encarnacao, J.L. (ed.) Proceedings of the International Conference and Exhibition, Eurographics 1981, pp. 127–135. North-Holland Publishing Company, Amsterdam (1981)
Ottmann, T.: Von Menschen und Computern: Über mehr als 10 Jahre Erfahrungen mit Präsentationsaufzeichnungen an Universitäten. In: von Kortzfleisch, H.O., Bohl, O. (eds.) Wissen, Vernetzung, Virtualisierung, pp. 175–186. Eul Verlag, Köln (2008)
Pottmann, H., Wallner, J.: Computational Line Geometry, 1st edn. Springer, Heidelberg (2001)
Reumann, K., Witkam, A.P.M.: Optimizing curve segmentation in computer graphics. In: Gunther, A., Levrat, B., Lipps, H. (eds.) Proceedings of the International Computing Symosium, New York, NY, USA, pp. 467–472. Elsevier, Amsterdam (1974)
Richter, M.: Grundwissen Mathematik für Ingenieure. Auflage, vol. 2. Vieweg und Teubner, Wiesbaden (2009)
TechSmith Corporation, http://www.techsmith.com/
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2011 Springer-Verlag Berlin Heidelberg
About this chapter
Cite this chapter
Mohamed, K.A., Ottmann, T. (2011). Maintaining the Personal Style and Flair of Handwriting in Presentation Recordings. In: Calude, C.S., Rozenberg, G., Salomaa, A. (eds) Rainbow of Computer Science. Lecture Notes in Computer Science, vol 6570. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-19391-0_17
Download citation
DOI: https://doi.org/10.1007/978-3-642-19391-0_17
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-19390-3
Online ISBN: 978-3-642-19391-0
eBook Packages: Computer ScienceComputer Science (R0)