A new image fusion algorithm is proposed based on the nonsubsampled Contourlet transform (NSCT). After the NSCT of images, the adaptive regional energy as the regular for the low frequency subband coefficients, the high-frequency detail images in different levels are processed by different fusion rules. The absolute maximum based on detail coefficients as the regular for the high level high-frequency and the weighted regional strength ratio as the regular for the others levels high-frequency. The experimental results show that the presented algorithm obviously improves the visual quality and objective indexes.