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Baust, M.* ; Demaret, L. ; Storath, M.* ; Navab, N.* ; Weinmann, A.

Total variation regularization of shape signals.

Proc. IEEE Inst. Electr. Electron. Eng., 2075-2083 (2015)
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This paper introduces the concept of shape signals, i.e., series of shapes which have a natural temporal or spatial ordering, as well as a variational formulation for the regularization of these signals. The proposed formulation can be seen as the shape-valued generalization of the Rudin-Osher-Fatemi (ROF) functional for intensity images. We derive a variant of the classical finite-dimensional representation of Kendall, but our framework is generic in the sense that it can be combined with any shape space. This representation allows for the explicit computation of geodesics and thus facilitates the efficient numerical treatment of the variational formulation by means of the cyclic proximal point algorithm. Similar to the ROF-functional, we demonstrate experimentally that ℓ1-type penalties both for data fidelity term and regularizer perform best in regularizing shape signals. Finally, we show applications of our method to shape signals obtained from synthetic, photometric, and medical data sets.
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Publication type Article: Journal article
Document type Scientific Article
ISSN (print) / ISBN 0018-9219
e-ISSN 1558-2256
Conference Title IEEE Conference on Computer Vision and Pattern Recognition (CVPR)
Conference Date 7-12 June 2015
Conference Location Boston, MA
Quellenangaben Volume: , Issue: , Pages: 2075-2083 Article Number: , Supplement: ,
Publisher Institute of Electrical and Electronics Engineers (IEEE)
Reviewing status