Image fusion using the Wavelet TRW and Haar transforms: Enhancement of spatial resolution for the Ikonos images from Ortophotos

Abstract

This article has as a purpose to develop and assess two methodologies that allow to enhance spatial resolution without significant loss of the spectral resolution, with an Ikonos image and a Ortophoto. Using the RGB-IHS transform and the wavelet implementation of the Wavelet TRWH transform (Fast Haar transform) and Haar. Applying the fusion to the intensity components of the multispectral image (Im) and the ones from the ortophoto (Io) through the Wavelet haar transform predefined in Matlab together with the ARSIS technique, a new intensity l is generated respectively. To perform the inverse transforms IHS-RGB and thus obtain an multispectral image. Finally the obtained results are shown with the mathematical-statistical indexes CC, ERGAS, RSE and Qu.