Multisource image fusion by using the redundant wavelet decomposition

We propose in this paper a method for combining simultaneously multispectral (XS), panchromatic (P) and radar (SAR) images by suing conjointly the Intensity Hue Saturation (HIS) transform and the Redundant Wavelet Decomposition (RDW). The fusion is accomplished through two steps. Firstly, XS images are represented in the HIS system in order to isolate the spectral components (H,S) from the spatial information (I) component. Secondly, features coming from P and SAR images are incorporated into the (I) component by using the RWD. The obtained fused images show the contribution of the P image for discriminating lines and edges. While the SAR image provides an information on the surface roughness and the detection of point targets as houses, boats, and water-land transitions.