منابع مشابه
Gradient Flows and Geometric Active Contour Models Gradient Flows and Geometric Active Contour Models
In this note, we analyze the geometric active contour models proposed in 10, 31] from a curve evolution point of view and propose some modiications based on gradient ows relative to certain new metrics. This leads to a novel snake paradigm in which the feature of interest may be considered to lie at the bottom of a potential well. Thus the snake is attracted very naturally and eeciently to the ...
متن کاملGradient Flows and Geometric Active Contour Models
In this paper, we analyze the geometric active contour models discussed in [6, 181 from a curve evolution point of view and propose some modifications based on gradient flows relative to certain new featurebased Riemannian metrics. This leads to a novel snake paradigm in which the feature of interest may be considered to lie at the bottom of a potential well. Thus the snake is attracted very na...
متن کاملActive Contour Models
Active contour models have been widely applied to image segmentation and analysis. It has been successfully used in contour detection for object recognition, computer vision, computer graphics, and biomedical image processing such as X-ray, MRI and Ultrasound images. The energy-minimizing active contour models or snakes were developed by Kass, Witkin and Terzopoulos in 1987. Snakes are curves d...
متن کاملTexture-Adaptive Active Contour Models
Unsupervised segmentation is a key challenge for automated quantification of medical images. Although a balloon model is able to detect arbitrarily shaped objects in images, it requires careful adjustment of parameters prior to segmentation. Based on global texture analyses, our method allows to set these parameters automatically for heterogeneous images such as MRI, ultrasound, or microscopy. ...
متن کاملDouble Contour Active Shape Models
Statistical shape models are often learned from examples based on landmark correspondences between annotated examples. A method is proposed for learning such models from contours with inconsistent bifurcations and loops. It is evaluated on the task of segmenting tibial contours in knee radiographs. Results are presented using various features, distance weighted K−nearest neighbours and differin...
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ژورنال
عنوان ژورنال: IEEE Transactions on Image Processing
سال: 2007
ISSN: 1057-7149
DOI: 10.1109/tip.2006.884952