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CVPR
1997
IEEE

Gradient Vector Flow: A New External Force for Snakes

9 years 10 months ago
Gradient Vector Flow: A New External Force for Snakes
Snakes, or active contours, are used extensively in computer vision and image processing applications, particularly to locate object boundaries. Problems associated with initialization and poor convergence to concave boundaries, however, have limited their utility. This paper develops a new external force for active contours, largely solving both problems. This external force, which we call gradient vector flow (GVF), is computed as a diffusion of the gradient vectors of a gray-level or binary edge map derived from the image. The resultant field has a large capture range and forces active contours into concave regions. Examples on simulated images and one real image are presented.
Chenyang Xu, Jerry L. Prince
Added 05 Aug 2010
Updated 05 Aug 2010
Type Conference
Year 1997
Where CVPR
Authors Chenyang Xu, Jerry L. Prince
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