Comparative Analysis of Image Fusion Using DCT, DST, DWT, Walsh Transform and Kekre’s Wavelet Transform

Image fusion focuses on combining information from different images of a scene to obtain more useful information for various applications. A large number of transform techniques have been used for image fusion process that include DCT, DST, DWT, Kekre’s wavelet transform and Walsh transform. This paper compares the quality of image fusion obtained using these transforms. These techniques have been compared with each other in the past using different quality indices that include mean, variance, standard deviation, RMSE, PSNR and SF. This paper attempts to compare these fusion techniques using the various quality indices so as to get a clear picture about relative performance of these techniques. The experimental results on some standard test images demonstrate that DWT and DCT are better compared to other.