Wavelet Fusion on Ratio Images for Change Detection in SAR Images

Image Fusion is the technique which merges or combines the information from multiple resolution images of the same scenario. As the different resolution images of same scenario contains different information. The output of fusion image is a separate new image that retains the most desirable information of each image. The main application of fusion image is in merging of the high resolution images like gray-level image and the low resolution images like colored multispectral image. It has been found that the fusion method is more useful for spatially but usually introduce spectral distortion. So to overcome this problem, many multiscale transform based fusion scheme proposed. In this paper, we focus on the fusion methods based on the discrete wavelet transform (DWT) and change detection methods.