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2010

Satellite image compression by post-transforms in the wavelet domain

9 years 6 months ago
Satellite image compression by post-transforms in the wavelet domain
This paper proposes a novel compression scheme with a tunable complexity-ratedistortion trade-off. As images increase in size and resolution, more efficient compression schemes with low complexity are required on-board Earth observation satellites. The standard of the Consultative Committee for Space Data Systems (CCSDS) defines a strip-based compression scheme with the advantages of a low complexity and an easy rate control [1]. However, future mission specifications expect higher performance in terms of rate-distortion. The scheme proposed in this paper intends to perform better than the CCSDS standard while preserving low complexity and easy rate control. Moreover, to comply with existing on-board devices, the proposed core compression engine still uses the wavelet transform but in association with a linear post-processing inspired from the bandelet transform. The post-transform decomposes a small block of wavelet coefficients on a particular basis. This basis is adaptively sele...
Xavier Delaunay, Marie Chabert, Vincent Charvillat
Added 30 Jan 2011
Updated 30 Jan 2011
Type Journal
Year 2010
Where SIGPRO
Authors Xavier Delaunay, Marie Chabert, Vincent Charvillat, Géraldine Morin
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