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A discrete dynamic contour model

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2 Author(s)
Lobregt, S. ; Dept. of Adv. Dev., Philips Med. Syst., Best, Netherlands ; Viergever, M.A.

A discrete dynamic model for defining contours in 2-D images is developed. The structure of this model is a set of connected vertices. With a minimum of interaction, an initial contour model can be defined, which is then automatically modified by an energy minimizing process. The internal energy of the model depends on local contour curvature, while the external energy is derived from image features. Solutions are presented to avoid undesirable deformation effects, like shrinking and vertex clustering, which are common in existing active contour models. The deformation process stops when a local minimum of the energy function is reached. The final shape of the model is a reproducible approximation of the desired contour. Results of applying the method to computer-generated images, as well as clinical images, are presented

Published in:

Medical Imaging, IEEE Transactions on  (Volume:14 ,  Issue: 1 )

Date of Publication:

Mar 1995

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