A new proximity algorithm for an active contour model is proposed in this paper. In order to derive a mathematical form of the energy, the level set method is employed. In the new energy, a penalty term is introduced to make sure that the level set function can be restricted in the interval [-1, 1]. By introducing this term, the energy still keeps convex and is easy to construct its minimization algorithms. Based on the proximity operator and the corresponding theories, we deduce a proximity algorithm to minimize the energy. Experimental results demonstrate that the proposed model is powerful in its segmentation ability and accuracy. And comparisons with other popular algorithms show that the proposed algorithm is more efficient.
Focus on the multi-component image segmentation issue, a hierarchical model is proposed in this paper. The idea is to do segmentation iteratively. The (k+1)-th implementation is carried out not on the whole image domain but on the subimage which is detected as the objects region at the k-th segmentation. In order to achieve this purpose of selective segmentation, a region characteristic function which takes 1 for pixel in the given region and 0 otherwise is introduced, and a novel energy function is proposed based on it. The proposed energy function is convex, thus it can easily apply the fast minimization algorithm and obtain the global minima. In this paper, the well-known split Bregman method is used to minimize the proposed energy function. Experiments demonstrate that the proposed model is able to deal with multicomponent images. And comparisons show that the model is more accurate and efficient.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.