Focusing on multi-focus image fusion of the same scene, a new image fusion algorithm based on dual-tree complex wavelet transform (DT-CWT) was proposed. Firstly the image was decomposed with various scales and directional features using DT-CWT, the local directive contrast was defined according to the characters of the coefficients of all the sub-bands in the domain of dual-tree wavelet transform, and then the local directive contrast was applied in high frequency parts, and the definition of the image was applied in low frequency parts. Compared with other methods, the experiment results show that the proposed algorithm can extract and infuse the important information of the multi-focus image to the fusion image, the better fusion results are acquired, and the quality of fusion image was improved.