Optimal image fusion algorithm based on wavelet transforms

The fusion model in wavelet domain is proposed. To maximize fusion and enhances the hidden image´s capability of resisting attacks. Method: we derive the image related scrambling transform based on least square error principle. The algorithm improves the extent of fusion. The fusion factor, the scrambling matrix and iteration number are used as secret keys with the intension of improving the algorithm´s security. Result: Simulation experiments have proved that the proposed algorithm improves the fusion factor and the extent of fusion significantly, Conclusion: The algorithm can be widely used for copyright protection of electronic image products and encrypted transmission of important military information.