International Journal of Computer Vision
Generalized gradient vector flow external forces for active contours
Signal Processing - Special issue on deformable models and techniques for image and signal processing
Gradient Vector Flow: A New External Force for Snakes
CVPR '97 Proceedings of the 1997 Conference on Computer Vision and Pattern Recognition (CVPR '97)
Gradient Vector Flow Fast Geometric Active Contours
IEEE Transactions on Pattern Analysis and Machine Intelligence
Level Set Evolution without Re-Initialization: A New Variational Formulation
CVPR '05 Proceedings of the 2005 IEEE Computer Society Conference on Computer Vision and Pattern Recognition (CVPR'05) - Volume 1 - Volume 01
Snakes, shapes, and gradient vector flow
IEEE Transactions on Image Processing
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The technique of geometric active contours has become quite popular for a variety of applications, particularly image segmentation and classification problems. In traditional active contour models, snake initialization is performed manually by users, and topological changes, such as splitting of the snake, can not be automatically handled. In this paper, we present an automatic geometric active contours model which can extract multiple objects in an image without any manual assistance and completely eliminates the need of costly re-initialization procedure. The proposed framework is inspired by the geodesic active contour model and leads to a paradigm that is relatively free from the initial curve position. According to the proposed flow, the traditional boundary attraction term is replaced with a new force that guides the propagation to the object boundaries from both sides. This new geometric active contour model is implemented using a level set approach, thereby allowing dealing naturally with topological changes.