Disjunctive fusion, contrary to conjunctive fusion, assumes that there is only one reliable source among the sources to be fused, but we do not know which. This assumption is not valid in the case of satellite images because, as seen previously, the spectral bands of an image, as well as the out-image data, are concordant most of the time, and can be taken as reliable.

Disjunctive fusion should not thus be efficient for the fusion of satellite images. However, as it occurs in the adaptive fusion used in the following pages, it is useful to observe its behaviour here.


 Principle

Let us note again that disjunctive fusion consists in applying, for a pixel x, the operator ``maximum'' onto the degrees of possibility of the membership of pixel x to a class c.

Those degrees are provided by the set of the p sources :

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• Disjunctive Fusion of the Spectral Bands and Out-Image Data
• Disjunctive Fusion of Spectral Bands MSS4 to MSS7
• Disjunctive Fusion of Spectral Bands MSS4 to MSS7 and Out-Image Data
• Inter-Classes Confusion
• Disjunctive Fusion of Spectral Bands MSS4 to MSS7
• Disjunctive Fusion of Spectral Bands MSS4 to MSS7 and Out-Image Data
• Conclusion on Disjunctive Fusion