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Generalized Sampling Approximation for Multivariate Discontinuous Signals and Applications to Image Processing

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New Perspectives on Approximation and Sampling Theory

Part of the book series: Applied and Numerical Harmonic Analysis ((ANHA))

Abstract

The aim of the paper is to extend some results concerning univariate generalized sampling approximation to the multivariate frame. We give estimates of the approximation error of the multivariate generalized sampling series for not necessarily continuous functions in \(L^{p}(\mathbb{R}^{n})\)-norm, using the averaged modulus of smoothness of Sendov and Popov type. Finally, we study some concrete examples of sampling operators and give applications to image processing dealing, in particular, with biomedical images.

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Notes

  1. 1.

    In one dimension, where the variable t is often identified with time, we also speak of a time-limited kernel.

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Acknowledgements

The authors would like to thank Dr. Enrico Cieri and Dr. Giacomo Isernia of the section of Vascular Surgery and Dr. Pietro Pozzilli of the section of Diagnostic and Interventional Radiology of the University of Perugia for their collaboration concerning the applications of our theory to biomedical images.

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Correspondence to Rudolf Stens .

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Dedicated to Professor Paul L. Butzer, our teacher and sincere friend, in high esteem

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Bardaro, C., Mantellini, I., Stens, R., Vautz, J., Vinti, G. (2014). Generalized Sampling Approximation for Multivariate Discontinuous Signals and Applications to Image Processing. In: Zayed, A., Schmeisser, G. (eds) New Perspectives on Approximation and Sampling Theory. Applied and Numerical Harmonic Analysis. Birkhäuser, Cham. https://doi.org/10.1007/978-3-319-08801-3_5

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