Firstly, mid-wave and long-wave infrared images are decomposed into morphological pyramids respectively, and features are extracted in corresponding level. Then fusion rules and merge images are set up at different levels for reconstructing original image. 首先把中波和长波红外图像分解成形态金字塔,建立融合准则,在相应的级上提取特征进行融合,然后重建原图像。