1. A method for calibrating an image of a camera with respect to its viewing space, such that camera projection parameters of a camera projection of the viewing space onto the image are determined, comprising the steps of: providing a movable carrier with at least four markings that can be viewed by the camera and that span a volume and form known first world points in the viewing space; recording a first image of the viewing space; shifting the carrier in the viewing space by an unknown offset in order to obtain second world points dependent on this offset in the viewing space; recording a second image of the viewing space; detecting the markings in the first image as first image points and in the second image as second image points; and determining the camera projection parameters, while also determining the offset, from the known first world points, the second world points dependent on the offset, the detected first image points, and the detected second image points.