Publications

Christiaan van der Walt

Conference papers/proceedings

E. Barnard, M.A. Cho, P. Debba, R. Mathieu, K. Wessels, C. van Heerden, C. van der Walt, G.P. Asner, "Optimizing tree-species classification in hyperspectal images," in Proceedings of the 21st Annual Symposium of the Pattern Recognition Association of South Africa (PRASA), Stellenbosch, South Africa, November 2010, pp. 33-37.

F. de Wet, P. Müller, C. van der Walt and T. Niesler, "Segmentation and accuracy-based scores for the automatic assessment of oral proficiency for proficient L2 speakers," in Proceedings of the 21st Annual Symposium of the Pattern Recognition Association of South Africa (PRASA), Stellenbosch, South Africa, November 2010, pp. 75-80.

C. van Heerden, E. Barnard, M. Davel, C. van der Walt, E. van Dyk, M. Feld and C. Müller, "Combining regression and classification methods for improving automatic speaker age recognition," in Proceedings of the International Conference on Acoustics and Signal Processing (ICASSP), Dallas, Texas, March 2010, pp. 5174-5177.

E. Barnard, C. van der Walt, M. Davel, C. van Heerden, F. Senekal and T. Naidoo, "Learning structured representations of data," in Proceedings of the 20th Annual Symposium of the Pattern Recognition Association of South Africa (PRASA), Stellenbosch, South Africa, November 2009, pp. 1-6.

P. Müller, F. de Wet, C. van der Walt and T.R. Niesler, "Automatically assessing the oral proficiency of proficient L2 speakers," in Proceedings of the 2nd ISCA Workshop on Speech and Language Technology in Education, CD ROM, September 2009.

C. van der Walt and E. Barnard, "Density estimation from local structure," in Proceedings of the 20th Annual Symposium of the Pattern Recognition Association of South Africa (PRASA), Stellenbosch, South Africa, November 2009, pp. 131-136.

C. van der Walt and E. Barnard, "Measures for the characterisation of pattern-recognition data sets," in Proceedings of the 18th Annual Symposium of the Pattern Recognition Association of South Africa (PRASA), Pietermaritzburg, South Africa, November 2007, pp. 75-78.

C. van der Walt and E. Barnard, "Data characteristics that determine classifier performance," in Proceedings of the 17th Annual Symposium of the Pattern Recognition Association of South Africa (PRASA), Parys, South Africa, November 2006, pp. 166-171.

Journal articles

C.M. van der Walt and E. Barnard, "Data characteristics that determine classifier performance," SAIEE Africa Research Journal, vol. 98, no. 3, pp. 87-93, September 2007.

C.J. van Heerden and E. Barnard, "Speech rate normalization used to improve speaker verification," SAIEE Africa Research Journal, vol. 98, no. 4, pp. 129-135, December 2007.