Image Fusion Based on EM Algorithm and Discrete Wavelete Frame

<正>The discrete wavelet transform has become an attractive tool for fusing multisensor images.This paper investigates the discrete wavelet frame transform.A major advantage of this method over discrete wavelet transform is aliasing free and translation invariant.The discrete wavelet frame(DWF)transform is used to decompose the registered images into multiscale representation with the low frequency and the high frequency bands.The low frequency band is normalized and fused by using the expectation maximization(EM)algorithm.The informative importance measure is applied to the high frequency band.The final fused image is obtained by taking the inverse transform on the composite coefficient representations.Experiments show that the proposed method is more effective than conventional image fusion methods.