期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2010
卷号：XXXVIII - Part 7A
页码：209-214
出版社：Copernicus Publications
摘要：In this paper we present a comparative case of study ofdifferentmethodologies for image sharpening.The evaluated methodologiesareclassic procedures such asBrovey (BR), Intensity Hue Saturation (FIHS), and Principal Component Analysis (PCA); twoprocedures based on wavelettransforms: Wavelet à Trous (WAT) and MultiDirection MultiResolution (MDMR); and one method ofa geostatistical nature, Downscaling Cokriging (DCK). The comparison of the fusedimagesis based on thequantitative evaluationof their spatial and spectral characteristics by calculating statistical indexes and parameters tomeasure the quality and coherence ofthe resulting images.Synthesis of the obtained results shows that the algorithm fusions based on wavelet and DCK yielded better results than did theclassical algorithms. Particularly, the DCK geostatistical methoddoes notintroduceartefacts in the estimation of the digital levelscorresponding with the source multispectral image and, in this sense, can be considered the most coherent method. The MDMRmethodproduces the merged imageswiththe highest spatial quality
