Lossless compression of multispectral SPOT images

Gerard Mozelle; Francoise J. Preteux; Catalin Iulian Fetita; Francois Cabot

doi:10.1117/12.271127

4 April 1997 Lossless compression of multispectral SPOT images

Gerard Mozelle, Francoise J. Preteux, Catalin Iulian Fetita, Francois Cabot

Proceedings Volume 3026, Nonlinear Image Processing VIII; (1997) https://doi.org/10.1117/12.271127
Event: Electronic Imaging '97, 1997, San Jose, CA, United States

Abstract

In this paper, we address the problem of lossless multispectral compression of remote-sensing data acquired using SPOT satellites. Compression algorithms have classically two stages: a transformation of the available data and coding. In the first stage, the aim is to express the spectral data as uncorrelated data in an optimal way. In the second stage, the coding is performed via the use of either a Rice or an arithmetic coding. In the first part of this paper, we discuss two well-known schemes, namely predictive technique and S + P transform, for the spatial decorrelation of multispectral SPOT images. Obviously, using only spatial properties is not optimal. However, few works have been carried out to address simultaneously the three intrinsic dimensions of multispectral images. In order to overcome this limitation, we have developed a predictive model based on three 3D-predictors. Compression ratios obtained are presented and discussed. In particular, there is a significant improvement in the compression ratios with respect to lossless compression methods based on spatial decorrelation method.

Citation Download Citation

Gerard Mozelle, Francoise J. Preteux, Catalin Iulian Fetita, and Francois Cabot "Lossless compression of multispectral SPOT images", Proc. SPIE 3026, Nonlinear Image Processing VIII, (4 April 1997); https://doi.org/10.1117/12.271127

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