Publicaties

Ralph Niels. Allograph based writer identification, handwriting analysis and character recognition. PhD thesis, Donders Centre for Brain, Behaviour and Cognition, Radboud University Nijmegen, Netherlands, 2010. Website.
Axel Brink, Ralph Niels, Roeland van Batenburg, Elisa van den Heuvel & Lambert Schomaker. Towards robust writer verification by correcting unnatural slant. Pattern Recognition Letters. Volume 32, Issue 3, February 2011, Pages 449-457.
Louis Vuurpijl, Don Willems, Ralph Niels & Marcel van Gerven. Design Issues for Pen-Centric Interactive Maps. In Robert Babuska, Frans C.A. Groen (Eds.) Interactive Collaborative Information Systems. Springer, 2010.
Don Willems, Ralph Niels, Marcel van Gerven & Louis Vuurpijl. Iconic and multi-stroke gesture recognition. Pattern Recognition, Volume 42, Issue 12, December 2009, Pages 3303-3312.
Ralph Niels, Don Willems & Louis Vuurpijl. The NicIcon database of handwritten icons. 11th International Conference on the Frontiers of Handwriting Recognition (ICFHR 2008), pages 296-301, Montréal, Canada. August 19-21, 2008.
Ralph Niels, Franc Grootjen & Louis Vuurpijl. Writer identification through information retrieval: the allograph weight vector. 11th International Conference on the Frontiers of Handwriting Recognition (ICFHR 2008), pages 481-486, Montréal, Canada. August 19-21, 2008.
Carlo di Brina, Ralph Niels, Anneloes Overvelde, Gabriel Levi & Wouter Hulstijn. Dynamic time warping: A new method in the study of poor handwriting. Human Movement Science. Vol. 21, No. 2. Pages 242-255. April 2008.
Vivian Blankers, Ralph Niels & Louis Vuurpijl. Writer identification by means of explainable features: shapes of loop and lead-in strokes. In Proceedings of the 19th Belgian-Dutch Conference on Artificial Intelligence (BNAIC 2007), pages 17-24, Utrecht, The Netherlands, November 5-6, 2007.
Ralph Niels & Louis Vuurpijl. Generating copybooks from consistent handwriting styles. In Proceedings of the 9th International Conference on Document Analysis and Recognition (ICDAR2007), pages 1009-1013, Curitiba, Brazil, September 23-26, 2007.
Vivian Blankers & Ralph Niels. Writer identification by means of loop and lead-in features. In Proceedings of the 1st NSVKI Student Conference (NSVKI), pages 37-43, Nijmegen, The Netherlands, June 22, 2007.
Carlo di Brina & Ralph Niels & Anneloes Overvelde & Gabriel Levi & Wouter Hulstijn. Dynamic Time Warping: A new method for analyzing the poor spatial characteristics of letters in dysgraphic children. Developmental Coordination Disorder Conference (DCD - VII), Melbourne, Australia, February 6-9, 2007.
Anneloes Overvelde & Carlo di Brina & Ralph Niels & Gabriel Levi & Wouter Hulstijn. Learning to write a new letter form: Good and poor writers compared on spatial characteristics and movement kinematics. Developmental Coordination Disorder Conference (DCD - VII), Melbourne, Australia, February 6-9, 2007.
Ralph Niels & Louis Vuurpijl & Lambert Schomaker. Automatic allograph matching in forensic writer identification. International Journal of Pattern Recognition and Artificial Intelligence (IJPRAI). Vol. 21, No. 1. Pages 61-81. February 2007.
Ralph Niels & Louis Vuurpijl. Automatic trajectory extraction and validation of scanned handwritten characters. 10th International Workshop on Frontiers In Handwriting Recognition (IWFHR10), pages 343-348, La Baule, France, October 23-26, 2006.
Ralph Niels, Louis Vuurpijl & Lambert Schomaker. Introducing TRIGRAPH - Trimodal Writer Identification. Presented at the ENFSI Conference of the European Network of Forensic Handwriting Experts (ENFHEX2005), Budapest, Hungary, November 10-12, 2005.
Ralph Niels & Louis Vuurpijl. Dynamic Time Warping Applied to Tamil Character Recognition. In Proceedings of the 8th International Conference on Document Analysis and Recognition (ICDAR2005), pages 730-734, Seoul, Korea, August 29-September 1, 2005.
Ralph Niels & Louis Vuurpijl. Using Dynamic Time Warping for Intuitive Handwriting Recognition. In Advances in Graphonomics, proceedings of the 12th Conference of the International Graphonomics Society (IGS2005), Eds. A. Marcellli and C. De Stefano, pages 217-221, Salerno, Italy, June 26-29, 2005.
ISMC Award for best presentation given by a graduate student (www.i-s-m-c.org).
Ralph Niels. Dynamic Time Warping: An Intuitive Way of Handwriting Recognition? Master's thesis, Radboud University Nijmegen, 2004.
Manuscript committee: Dr. L.G. Vuurpijl (supervisor), Prof. Dr. C.M. Jonker and Dr. P.A. Kamsteeg.
Louis Vuurpijl, Ralph Niels, Merijn van Erp, Lambert Schomaker & Eugene Ratzlaff. Verifying the UNIPEN devset. In Proceedings of the 9th International Workshop on Frontiers In Handwriting Recognition (IWFHR9), pages 586-591, Tokyo, Japan, October 2004.