@conference {Horvath07c, title = {A Multispectral Data Model for Higher-Order Active Contours and its Application to Tree Crown Extraction}, booktitle = {Proceedings of the Advanced Concepts for Intelligent Vision Systems (ACIVS)}, volume = {4678}, year = {2007}, month = {2007}, pages = {200-211}, type = {Conference paper}, address = {Delft, Netherlands}, doi = {10.1007/978-3-540-74607-2_18}, author = {Peter Horvath}, editor = {Wilfried Philips and Dan Popescu and Paul Scheunders} }