In this paper, we propose a generic hybrid oriented-transform and wavelet-based image representation for intra-band image coding. We instantiate for three popular directional transforms having similar powers of approximation but different redundancy factors. For each transform type, we design a compression scheme wherein we exploit intra-band coefficient dependencies. We show that our schemes outperform alternative approaches reported in literature. Moreover, on some images, we report that two of the proposed codec schemes outperform JPEG2000 by over 1 dB. Finally, we investigate the trade-off between oversampling and sparsity and show that, at low rates, hybrid coding schemes with transform redundancy factors as high as 1.25 to 5.8 are capable in fact of outperforming JPEG2000 and its critically-sampled wavelets.
Alecu, A, Munteanu, A, Pizurica, A, Cornelis, J & Schelkens, P 2007, On hybrid directional transform-based intra-band image coding. in J Blanc-talon, W Philips, D Popescu & P Scheunders (eds), Advanced Concepts for Intelligent Vision Systems. vol. 4678, Lecture Notes in Computer Science, Springer Verlag, pp. 1049-1060.
Alecu, A., Munteanu, A., Pizurica, A., Cornelis, J., & Schelkens, P. (2007). On hybrid directional transform-based intra-band image coding. In J. Blanc-talon, W. Philips, D. Popescu, & P. Scheunders (Eds.), Advanced Concepts for Intelligent Vision Systems (Vol. 4678, pp. 1049-1060). (Lecture Notes in Computer Science). Springer Verlag.
@inbook{0a9924ecd86f4defa0595d86887264d8,
title = "On hybrid directional transform-based intra-band image coding",
abstract = "In this paper, we propose a generic hybrid oriented-transform and wavelet-based image representation for intra-band image coding. We instantiate for three popular directional transforms having similar powers of approximation but different redundancy factors. For each transform type, we design a compression scheme wherein we exploit intra-band coefficient dependencies. We show that our schemes outperform alternative approaches reported in literature. Moreover, on some images, we report that two of the proposed codec schemes outperform JPEG2000 by over 1 dB. Finally, we investigate the trade-off between oversampling and sparsity and show that, at low rates, hybrid coding schemes with transform redundancy factors as high as 1.25 to 5.8 are capable in fact of outperforming JPEG2000 and its critically-sampled wavelets.",
keywords = "data compression, image coding, image representation, wavelet transforms",
author = "Alin Alecu and Adrian Munteanu and Alexandra Pizurica and Jan Cornelis and Peter Schelkens",
note = "J. Blanc-Talon, W. Philips, D. Popescu, P. Scheunders",
year = "2007",
month = aug,
language = "English",
volume = "4678",
series = "Lecture Notes in Computer Science",
publisher = "Springer Verlag",
pages = "1049--1060",
editor = "J. Blanc-talon and W. Philips and D. Popescu and P. Scheunders",
booktitle = "Advanced Concepts for Intelligent Vision Systems",
address = "Germany",
}