Night infrared medium-long wave image fusion method and system

The invention relates to a night infrared medium-long wave image fusion method and system. The method comprises the following steps: registering a medium-wave infrared image and a long-wave infrared image in the same scene at night by adopting a multi-source image registration method based on mutual information and an evolutionary strategy; performing fast adaptive two-dimensional empirical mode decomposition on the preprocessed medium-wave infrared image and long-wave infrared image, and determining a detail layer component and a base layer component; fusing detail layer components of the preprocessed medium-wave infrared image and the preprocessed long-wave infrared image by adopting an improved detail layer coefficient method of a local energy window; according to the base layer component of the pre-processed medium-wave infrared image and long-wave infrared image, performing maximum symmetric surround saliency detection based on the regional energy of the medium-wave infrared image; and carrying out inver