TY - CONF T1 - A Multispectral Data Model for Higher-Order Active Contours and its Application to Tree Crown Extraction T2 - Proceedings of the Advanced Concepts for Intelligent Vision Systems (ACIVS) Y1 - 2007 A1 - Peter Horvath ED - Wilfried Philips ED - Dan Popescu ED - Paul Scheunders JF - Proceedings of the Advanced Concepts for Intelligent Vision Systems (ACIVS) CY - Delft, Netherlands VL - 4678 ER -