Video surveillance systems are increasingly beginning to use sensors which working in the infrared spectrum. Infrared cameras are widespread nowadays. However, the video surveillance operator often faces the problem of poor visibility of the observed object. This occurs in low light (night, twilight) and adverse weather conditions (haze, smoke, dust). In this article the methods of the visual quality enhancement of the images obtained in bad lighting conditions are considered. Fusion of visual data (RGB) and infrared (IR) images are used to enhancement of images visual quality.