Disjunctive Normal Shape and Appearance Priors with Applications to Image Segmentation
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...
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Published in | Medical Image Computing and Computer-Assisted Intervention – MICCAI 2015 Vol. 9351; pp. 703 - 710 |
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Main Authors | , , |
Format | Book Chapter Journal Article |
Language | English |
Published |
Cham
Springer International Publishing
01.10.2015
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Series | Lecture Notes in Computer Science |
Subjects | |
Online Access | Get full text |
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Summary: | 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. |
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ISBN: | 9783319245737 3319245732 |
ISSN: | 0302-9743 1611-3349 |
DOI: | 10.1007/978-3-319-24574-4_84 |