Local mapping for multispectral image visualization

In this paper, fusion of multispectral images for visualization is aimed at . The techniques that are studied are mappings of the scattergram onto a on e-dimensional feature space. Linear Principal Component Analysis (PCA) as w ell as non-linear Self-Organizing Maps (SOM) are discussed. In this paper. local mappings are studied. Two spatially local techniques are proposed and discussed: a pixel-based and a block-based technique, where a local map of the scattergram is calculated for each pixel and for a block of pixels. re spectively. In the experimental section, the proposed techniques are applie d to PCA and SOM. For a test image, they are compared to each other and to global PCA and SOM. (C) 2001 Elsevier Science B.V. All rights reserved.