ACCURACY IMPROVEMENTS AND ARTIFACTS REMOVAL IN EDGE BASED IMAGE INTERPOLATION

Nicola Asuni, Andrea Giachetti

Abstract

In this paper we analyse the problem of general purpose image upscaling that preserves edge features and natural appearance and we present the results of subjective and objective evaluation of images interpolated using different algorithms. In particular, we consider the well-known NEDI (New Edge Directed Interpolation, Li and Orchard, 2001) method, showing that by modifying it in order to reduce numerical instability and making the region used to estimate the low resolution covariance adaptive, it is possible to obtain relevant improvements in the interpolation quality. The implementation of the new algorithm (iNEDI, improved New Edge Directed Interpolation), even if computationally heavy (as the Li and Orchard’s method), obtained, in both subjective and objective tests, quality scores that are notably higher than those obtained with NEDI and other methods presented in the literature.

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Paper Citation


in Harvard Style

Asuni N. and Giachetti A. (2008). ACCURACY IMPROVEMENTS AND ARTIFACTS REMOVAL IN EDGE BASED IMAGE INTERPOLATION . In Proceedings of the Third International Conference on Computer Vision Theory and Applications - Volume 1: VISAPP, (VISIGRAPP 2008) ISBN 978-989-8111-21-0, pages 58-65. DOI: 10.5220/0001074100580065


in Bibtex Style

@conference{visapp08,
author={Nicola Asuni and Andrea Giachetti},
title={ACCURACY IMPROVEMENTS AND ARTIFACTS REMOVAL IN EDGE BASED IMAGE INTERPOLATION},
booktitle={Proceedings of the Third International Conference on Computer Vision Theory and Applications - Volume 1: VISAPP, (VISIGRAPP 2008)},
year={2008},
pages={58-65},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0001074100580065},
isbn={978-989-8111-21-0},
}


in EndNote Style

TY - CONF
JO - Proceedings of the Third International Conference on Computer Vision Theory and Applications - Volume 1: VISAPP, (VISIGRAPP 2008)
TI - ACCURACY IMPROVEMENTS AND ARTIFACTS REMOVAL IN EDGE BASED IMAGE INTERPOLATION
SN - 978-989-8111-21-0
AU - Asuni N.
AU - Giachetti A.
PY - 2008
SP - 58
EP - 65
DO - 10.5220/0001074100580065