TY - JOUR T1 - A higher-order active contour model of a 'gas of circles' and its application to tree crown extraction JF - PATTERN RECOGNITION Y1 - 2009 A1 - Peter Horvath A1 - Ian Jermyn A1 - Zoltan Kato A1 - Josiane Zerubia VL - 42 SN - 0031-3203 IS - 5 N1 - UT: 000263431200011doi: 10.1016/j.patcog.2008.09.008 JO - PATTERN RECOGN ER - TY - THES T1 - The 'Gas of Circles' Model and its Application to Tree Crown Extraction Y1 - 2007 A1 - Peter Horvath PB - University of Nice - Sophia Antipolis and University of Szeged VL - PhD ER - TY - CONF T1 - A 'gas of Circles' Phase Field Model and its Application to Tree Crown Extraction T2 - Proceedings of the European Signal Processing Conference (EUSIPCO) Y1 - 2007 A1 - Peter Horvath A1 - Ian Jermyn ED - Marek Domanski ED - Ryszard Stasinski ED - Maciej Bartkowiak JF - Proceedings of the European Signal Processing Conference (EUSIPCO) CY - Poznan, Poland ER - TY - CONF T1 - Kör alakú objektumok szegmentálása magasabb rendű aktív kontúr modellek segítségével T2 - A Képfeldolgozók és Alakfelismerők Társaságának konferenciája - KÉPAF 2007 Y1 - 2007 A1 - Peter Horvath A1 - Ian Jermyn A1 - Zoltan Kato A1 - Josiane Zerubia ED - Attila Fazekas ED - András Hajdú JF - A Képfeldolgozók és Alakfelismerők Társaságának konferenciája - KÉPAF 2007 PB - Képfeldolgozók és Alakfelismerők Társasága CY - Debrecen ER - 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 - TY - CONF T1 - A New Phase Field Model of a 'gas of Circles' for Tree Crown Extraction from Aerial Images T2 - Proceedings of the International Conference on Computer Analysis of Images and Patterns (CAIP) Y1 - 2007 A1 - Peter Horvath A1 - Ian Jermyn ED - Walter G. Kropatsch ED - Martin Kampel ED - Allan Hanbury JF - Proceedings of the International Conference on Computer Analysis of Images and Patterns (CAIP) CY - Vienna, Austria VL - 4673 ER - TY - CHAP T1 - A higher-order active contour model for tree detection T2 - Proceedings of the18th International Conference on Pattern Recognition, ICPR 2006 Y1 - 2006 A1 - Peter Horvath A1 - Ian Jermyn A1 - Zoltan Kato A1 - Josiane Zerubia ED - YY Tang AB -

We present a model of a 'gas of circles', the ensemble of regions in the image domain consisting of an unknown number of circles with approximately fixed radius and short range repulsive interactions, and apply it to the extraction of tree crowns from aerial images. The method uses the recently introduced 'higher order active contours' (HOACs), which incorporate long-range interactions between contour points, and thereby include prior geometric information without using a template shape. This makes them ideal when looking for multiple instances of an entity in an image. We study an existing HOAC model for networks, and show via a stability calculation that circles stable to perturbations are possible for constrained parameter sets. Combining this prior energy with a data term, we show results on aerial imagery that demonstrate the effectiveness of the method and the need for prior geometric knowledge. The model has many other potential applications. © 2006 IEEE.

JF - Proceedings of the18th International Conference on Pattern Recognition, ICPR 2006 PB - IEEE N1 - ScopusID: 34047219865doi: 10.1109/ICPR.2006.79 ER - TY - CONF T1 - A Higher-Order Active Contour Model for Tree Detection T2 - Proceedings of the International Conference on Pattern Recognition (ICPR) Y1 - 2006 A1 - Peter Horvath A1 - Ian Jermyn A1 - Zoltan Kato A1 - Josiane Zerubia AB -

We present a model of a 'gas of circles', the ensemble of regions in the image domain consisting of an unknown number of circles with approximately fixed radius and short range repulsive interactions, and apply it to the extraction of tree crowns from aerial images. The method uses the recently introduced 'higher order active contours' (HOACs), which incorporate long-range interactions between contour points, and thereby include prior geometric information without using a template shape. This makes them ideal when looking for multiple instances of an entity in an image. We study an existing HOAC model for networks, and show via a stability calculation that circles stable to perturbations are possible for constrained parameter sets. Combining this prior energy with a data term, we show results on aerial imagery that demonstrate the effectiveness of the method and the need for prior geometric knowledge. The model has many other potential applications.

JF - Proceedings of the International Conference on Pattern Recognition (ICPR) PB - IAPR CY - Hong Kong, China VL - 2 ER - TY - ABST T1 - A Higher-Order Active Contour Model of a `Gas of Circles' and its Application to Tree Crown Extraction Y1 - 2006 A1 - Peter Horvath A1 - Ian Jermyn A1 - Zoltan Kato A1 - Josiane Zerubia ER - TY - CHAP T1 - An Improved `Gas of Circles' Higher-Order Active Contour Model and its Application to Tree Crown Extraction T2 - Proceedings of Indian Conference on Computer Vision, Graphics and Image Processing (ICVGIP) Y1 - 2006 A1 - Peter Horvath A1 - Ian Jermyn A1 - Zoltan Kato A1 - Josiane Zerubia ED - Prem Kalra ED - Shmuel Peleg JF - Proceedings of Indian Conference on Computer Vision, Graphics and Image Processing (ICVGIP) PB - Springer Verlag CY - Berlin; Heidelberg; New York N1 - doi: 10.1007/11949619_14 ER - TY - CHAP T1 - Shape Moments for Region Based Active Contours T2 - Joint Hungarian-Austrian conference on image processing and pattern recognition. 5th conference of the Hungarian Association for Image Processing and Pattern Recognition (KÉPAF), 29th workshop of the Austrian Association for Pattern Reco Y1 - 2005 A1 - Peter Horvath A1 - Avik Bhattacharya A1 - Ian Jermyn A1 - Josiane Zerubia A1 - Zoltan Kato ED - Dmitrij Chetverikov ED - László Czúni ED - Markus Vincze JF - Joint Hungarian-Austrian conference on image processing and pattern recognition. 5th conference of the Hungarian Association for Image Processing and Pattern Recognition (KÉPAF), 29th workshop of the Austrian Association for Pattern Reco PB - OCG CY - Vienna ER - TY - CONF T1 - Color, Texture and Motion Segmentation Using Gradient Vector Flow T2 - A Képfeldolgozók és Alakfelismerők Társaságának konferenciája - KÉPAF 2004 Y1 - 2004 A1 - Peter Horvath A1 - Zoltan Kato JF - A Képfeldolgozók és Alakfelismerők Társaságának konferenciája - KÉPAF 2004 CY - Miskolctapolca ER - TY - CONF T1 - Optical Flow Computation Using an Energy Minimization Approach T2 - A Képfeldolgozók és Alakfelismerők Társaságának konferenciája - KÉPAF 2004 Y1 - 2004 A1 - Peter Horvath A1 - Zoltan Kato JF - A Képfeldolgozók és Alakfelismerők Társaságának konferenciája - KÉPAF 2004 CY - Miskolctapolca ER -