Refer good books for the following topics in Image processing
for Multiresolution based fusion discrete wavelet transform you may refer the following
" A Wavelet based image fusion tutorial " by Gonzalo Pajares ( available at: www.ELSEVIERcomputer science.com)

"Wavelet based image fusion techniques - An introduction ,review and comparison by Krista Amolins

for Curvelet transform refer " Wavelet for image fusion" by shih-Gu Huang