The University of Auckland | The Department of Computer Science
Rachel Blagojevic
(nee Rachel Patel)
Email: rpat088 AT aucklanduni.ac.nz
Position: Postdoctoral Research Fellow
Supervisor: Beryl Plimmer

PhD Research: Using Data Mining for Digital Ink Recognition

My research is an investigation of the use of data mining techniques for improving sketch recognition algorithms. The focus of my research is to develop a more accurate recognizer to distinguish between text and shapes as a first step to digital ink diagram recognition. The main contributions of this research included a comprehensive ink feature library; a tool to efficiently manage data collection, labelling and dataset generation (DataManager); a data repository of ink data, a systematic investigation of the use of data mining for distinguishing between text and shapes and finally an improvement of sketch recognition techniques for diagrams as a result of more accurate recognisers.

DataManager

DataManager is a tool we have developed to collect and label digital ink data, automatically generate datasets, using our ink feature set, and automatically run comparative evaluations of sketch recognition algorithms.

DataManager is available for download including source code), along with some data we have collected.

Publications

  • Blagojevic R., B. Plimmer, J. Grundy, Y. Wang, Using Data Mining for Digital Ink Recognition: Dividing Text and Shapes in Sketched Diagrams, 2011, Volume 35, Issue 5, Computers & Graphics, p 976–991.
  • Plimmer B., P. Reid, R. Blagojevic, A. Crossan, S. Brewster, Signing on the tactile line: A multimodal system for teaching handwriting to blind children, 2011, ACM Transactions on Computer-Human Interaction (TOCHI), Volume 18, Issue 3, 29 pgs.
  • Blagojevic R., B. Plimmer, J. Grundy, Y. Wang, Building Digital Ink Recognizers using Data Mining: Distinguishing Between Text and Shapes in Hand Drawn Diagrams, 2010, Volume 6096, Trends in Applied Intelligent Systems, p 358-367.
  • Blagojevic R., S. Chang, B. Plimmer, The Power of Automatic Feature Selection: Rubine on Steroids , 7th Eurographics Symposium on Sketch Based Interfaces and Modelling (SBIM ’10), 2010, Annecy, France, p 79-86.
  • Chang S., B. Plimmer R. Blagojevic, Rata.SSR: Data Mining for Pertinent Stroke Recognizers , 7th Eurographics Symposium on Sketch Based Interfaces and Modelling (SBIM ’10), 2010, Annecy, France, p 95-102.
  • Schmieder P., B. Plimmer, R. Blagojevic, Automatic Evaluation of Sketch Recognizers, Sketch Based Interfaces and Modeling (SBIM '09), New Orleans, USA, 2009, pp. 85-92.
  • Blagojevic, R., P. Schmieder, B. Plimmer, Towards a Toolkit for the Development and Evaluation of Sketch Recognition Techniques, Intelligent User Interfaces (IUI’09) Sketch Recognition Workshop, Florida, USA, 2009.
  • Plimmer, B., S. Brewster, A. Crossan, R. Blagojevic, Multimodal collaborative handwriting training for visually-impaired people, SIGCHI conference on Human factors in computing systems (CHI ’08), Florence, Italy, 2008, Recipient of Best Paper Award.
  • Blagojevic, R., B. Plimmer, J. Grundy, Y. Wang, A Data Collection Tool for Sketched Diagrams , 5th Eurographics Conference on Sketch Based Interfaces and Modelling (SBIM ’08), Annecy, France, 2008.
  • Blagojevic, R., B. Plimmer, J. Grundy, Y. Wang, Development of Techniques for Sketched Diagram Recognition, Graduate Consortium on Visual Languages and Human-Centric Computing (VLHCC '08), Herrsching am Ammersee, Germany, 2008, pp.258-259.
  • Blagojevic, R., Development of Techniques for Sketched Diagram Recognition, Australasian Artificial Intelligence (AI’08) Graduate Consortium, 2008, Auckland, New Zealand.
  • Patel, R., B. Plimmer, J. Grundy, R. Ihaka, Ink Features for Diagram Recognition, 4th Eurographics Conference on Sketch Based Interfaces and Modelling (SBIM ’07), University of California, Riverside, USA, 2007.
  • Patel, R., B. Plimmer, J. Grundy, R. Ihaka, Exploring Better Techniques for Diagram Recognition, 5th NZ Computer Science Research Student Conference (NZCSRSC '07), University of Waikato, Hamilton, New Zealand, 2007.
Updated: 16-03-2012