SATTELITE IMAGE FUSION IN FAST DISCRETE CURVELET TRANSFORM DOMAIN
Keywords:
Image Fusion, Fast Discrete Curvelet Transforms, Local Magnitude Ratio (LMR)Abstract
Image fusion based on the Fourier and wavelet transform methods retain rich multispectral details but less spatial details from
source images. Wavelets perform well only at linear features but not at non linear discontinuities because they do not use the
geometric properties of structures. Curvelet transforms overcome such difficulties in feature representation. In this paper, we
define a novel fusion rule via high pass modulation using Local Magnitude Ratio (LMR) in Fast Discrete Curvelet Transforms
(FDCT) domain. For experimental study of this method Indian Remote Sensing (IRS) Resourcesat-1 LISS IV satellite sensor image
of spatial resolution of 5.8m is used as low resolution (LR) multispectral image and Cartosat-1 Panchromatic (Pan) of spatial
resolution 2.5m is used as high resolution (HR) Pan Image. This fusion rule generates HR multispectral image at 2.5m spatial
resolution.