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Disjunctive normal shape and appearance priors with applications to image segmentation

Mesadi, Fitsum and Çetin, Müjdat and Taşdizen, Tolga (2015) Disjunctive normal shape and appearance priors with applications to image segmentation. In: 18th International Conference on Medical Image Computing and Computer Assisted Interventions, Munich, Germany

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Official URL: http://dx.doi.org/10.1007/978-3-319-24574-4_84

Abstract

The use of appearance and shape priors in image segmentation is known to improve accuracy; however, existing techniques have several drawbacks. Active shape and appearance models require landmark points and assume unimodal shape and appearance distributions. Level set based shape priors are limited to global shape similarity. In this paper, we present a novel shape and appearance priors for image segmentation based on an implicit parametric shape representation called disjunctive normal shape model (DNSM). DNSM is formed by disjunction of conjunctions of half-spaces defined by discriminants. We learn shape and appearance statistics at varying spatial scales using nonparametric density estimation. Our method can generate a rich set of shape variations by locally combining training shapes. Additionally, by studying the intensity and texture statistics around each discriminant of our shape model, we construct a local appearance probability map. Experiments carried out on both medical and natural image datasets show the potential of the proposed method.

Item Type:Papers in Conference Proceedings
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
ID Code:28936
Deposited By:Müjdat Çetin
Deposited On:23 Dec 2015 20:59
Last Modified:23 Dec 2015 20:59

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