1. Method for simulation of a visual field of view, whereat for training of a battle situation the image of a background is displayed on a TV monitor in the field of view of the optics of a person to be trained and the image of a moveable target is cut in in that background and whereat the image of the background as well as the image of the target are digitally stored and are displayed after conversion into a video signal, characterized in that the gray scale levels of a daylight video picture of the background image point by image point are converted with a factor given by an evaluation function in order to produce a display according to a thermal image.