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Preservation of the spectral characteristics in multispectral images is important in the development of pansharpening methodsbecause it affects the accuracy of subsequent applications, such as visual interpretation, land cover classification, and changedetection. The combinations of the spectral properties (observation wavelength and width of spectral bands) of multispectral andpanchromatic images affect both the spatial and spectral quality of pansharpened images. Therefore, the clarification of the relationsbetween spectral bands and quality of pansharpened image is important for improving our understanding of pansharpening methods,and for developing better schemes for image fusion. This study investigated the influence of the spectral waveband of panchromaticimages on the image quality of multispectral (MS) images using simulated images produced from hyperspectral data. Panchromaticimages with different spectral band position and multispectral images with degraded spatial resolution were generated from airbornevisible/infrared imaging spectrometer (AVIRIS) images and pansharpened using seven methods: additive wavelet intensity, additivewavelet principal component, generalized Laplacian pyramid with spectral distortion minimization, generalized intensity-huesaturation(GIHS) transform, GIHS adaptive, Gram–Schmidt spectral sharpening, and block-based synthetic variable ratio. Thepansharpened near-infrared band was visually and statistically compared with the non-degraded image. Wide variation in qualitywas identified visually within and between methods depending on the spectral wavelengths of the panchromatic images.Quantitative evaluations using three frequently used indices, the correlation coefficient, <i>erreur relative globale adimensionnelle desynthèse</i> (ERGAS), and the Q index, showed the individual behaviors of the pansharpening methods in terms of the spectralsimilarity in panchromatic and near-infrared, though all methods had similar qualities in the case with the lowest similarity. Thesefindings are discussed in terms of the fundamentals and structures of the methods

THE INFLUENCE OF SPECTRAL WAVELENGTH ON THE QUALITY OF PANSHARPENED IMAGE SIMULATED USING HYPERSPECTRAL DATA