The paper presents the ideas, methods and tools used in fusion of remotely sensed data acquired by different systems and sensors. It is a contribution to the discussion on methods and approaches applied to fusion of imagery data having different spectral and spatial resolution, and on the necessity of elaboration of any formal framework of data fusion process quality assessment. This paper is general, not pretending to be an exhaustive revue of methods and techniques of data fusion. The authors show certain solutions in the context of commercial software functionality but they avoid any formal evaluating of them.

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