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In this paper, the effects of quantization noise feedback on the entropy of Laplacian pyramids are investigated. This technique makes it possible for the maximum absolute reconstruction error to be easily and strongly upper-bounded (near-lossless coding), and therefore, allows reversible compression. The entropy-minimizing optimum quantizer is obtained by(More)
This work presents a general and formal solution to the problem of fusion of a multi-spectral (MS) image with a higher-resolution panchromatic (P) observation. The method relies on the generalised Laplacian pyramid, which is an over-sampled structure obtained by subtracting from an image its low-pass version. The goal is to selectively performs(More)
In this work, an application of " browsing by coherence " is presented. An interferometric pair of single-look complex (SLC) ERS-1/2 Tandem images is multi-look processed and the resulting real-valued images are further compressed through a hierarchical method to yield quick-looks that may be browsed at different spatial resolutions, i.e. number of looks.(More)
concept and some successful implementation schemes. Abstract This article aims at explaining the ARSIS concept. By fusing two sets of images A and B, one with a high spatial resolution, the other with a low spatial resolution and different spectral bands, the ARSIS concept permits to synthesise the dataset B at the resolution of A that is as close as(More)