@inbook {1255, title = {An Improved {\textquoteleft}Gas of Circles{\textquoteright} Higher-Order Active Contour Model and its Application to Tree Crown Extraction}, booktitle = {Proceedings of Indian Conference on Computer Vision, Graphics and Image Processing (ICVGIP)}, year = {2006}, note = {doi: 10.1007/11949619_14}, month = {2006///}, pages = {152 - 161}, publisher = {Springer Verlag}, organization = {Springer Verlag}, address = {Berlin; Heidelberg; New York}, author = {Peter Horvath and Ian Jermyn and Zoltan Kato and Josiane Zerubia}, editor = {Prem Kalra and Shmuel Peleg} }