A head-up display system for representing image information for an observer includes an image encoder for emitting a first image, a projection area including a portion of a composite pane for deflecting a projection of an image, wherein a calibration system is arranged to ascertain a deviation between a first image and the projection of the first image and has a capturing system arranged to capture reflection properties of the composite pane and the image encoder is arranged to generate a correction image as a function of the deviation.