Katherine Allen, Niranjan Joshi, J. Alison Noble. Tramline and NP windows estimation for enhanced unsupervised retinal vessel segmentation. In Proceedings of the 8th IEEE International Symposium on Biomedical Imaging: From Nano to Macro, ISBI 2011, March 30 - April 2, 2011, Chicago, Illinois, USA. pages 1387-1390, IEEE, 2011. [doi]