Hybrid component substitution and wavelet based image fusion

A two step hybrid image fusion scheme is proposed for panchromatic and multi-spectral satellite sensors. First, we estimate an intermediate high/low resolution multi-spectral image using component substitution, which is followed by additive wavelet based high frequency injection into low resolution multi-spectral bands. Spectral dissimilarities between panchromatic and multi-spectral bands are taken into account while devising partial replacement strategy for component substitution. Quantitative analysis performed on Ikonos data set demonstrates that the proposed scheme outperforms state of the art multi-resolution image fusion schemes.

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