A fusion method of multi-spectral image and panchromatic image based on NSCT and IHS transform

An image fusion method of multi-spectral image and panchromatic image based on the nonsubsampled Contourlet transform (NSCT) is proposed by analyzing the design and implementation of the filter bands of the NSCT. The multi-spectral image is decomposed with the IHS (Intensity, Hue, Saturation) transform, and the I, H, S, component are gotten. The I component after treatment and the panchromatic image are decomposed with the NSCT. And then, the low-frequency coefficients and high-frequency coefficients for the fused image can be obtained by means of the fusion rules based on region variance and local energy respectively. Finally, the fused image is reconstructed by the inverse NSCT and IHS transform. The Experimental results show that the comprehensive performance of the method presented has increased in retaining the spectral information and spatial details, and better integration effect is achieved.