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Spectral or spatial quality for used satellite imagery? A trade-off solution using the wavelet a trous algorithm / M. Lillo-Saavedra in International Journal of Remote Sensing IJRS, vol 27 n°7-8 (April 2006)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 27 n°7-8 (April 2006) . - pp 1453 - 1464 Titre : Spectral or spatial quality for used satellite imagery? A trade-off solution using the wavelet a trous algorithm Type de document : Article/Communication Auteurs : M. Lillo-Saavedra, Auteur ; C. Gonzalo, Auteur Année de publication : 2006 Article en page(s) : pp 1453 - 1464 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] algorithme à trous [Termes IGN] fusion d'images [Termes IGN] image multibande [Termes IGN] image panchromatique [Termes IGN] qualité des données [Termes IGN] transformation en ondelettes Résumé : (Auteur) Several different methods for the fusion of multispectral and panchromatic images based on the wavelet transform have been proposed. The majority provide satisfactory results, but there is one, the a trous algorithm, that presents several advantages over the other fusion methods. Its computation is very simple; it only involves elementary algebraic operations, such as products, differences and convolutions. It yields a better spatial and spectral quality than the other methods. Standard fusion methods do not allow control of the spatial and spectral quality of the fused image; high spectral quality implies low spatial quality and vice versa. This paper proposes a new version of a fusion method based on the wavelet transform, computed through the a trous algorithm, that permits customization of the trade-off between the spectral and spatial quality of the fused image through the evaluation of two quality indices: a spectral index (the ERGAS index) and a spatial one. For the latter, a new spatial index based on ERGAS concepts and translated to the spatial domain has been defined. In addition, several different schemes for the computation of the fusion method investigated have been evaluated to optimize the degradation level of the source image required to perform the fusion process. The performance of the proposed fusion method has been compared with the fusion methods based on wavelet Mallat and filtering in the Fourier domain. Numéro de notice : A2006-158 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431160500462188 En ligne : https://doi.org/10.1080/01431160500462188 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27885 [article]

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