An algorithm of image fusion based on wavelet transform is proposed. Firstly

the obtained multi-source images which are registered are decomposed into several coefficients of low frequency and high frequency by using wavelet transform. Secondly

the wavelet coefficients of multi-source images are fused by different fusion rules based on regional features. Finally

the fusion image is obtained by inverse wavelet transform. Lots of experiments and comparisons with other fusion methods show that the effectiveness and superiority of image fusion method based on wavelet transform.