Research on Correction Algorithm of Head-up Display System in Vehicle Vibration

The head-up display system can overlay the real object with the projected image to assist the driver in driving. However, when road conditions are bad, the continuous vibration of the vehicle will cause the vehicle to tilt and shift. At this time, the projected image and the real object do not overlap well. This paper presents a correction algorithm for a head-up display system. The algorithm corrects the position of the projected image by inputting the tilt state of the vehicle. In this paper, the coordinate axis with the driver's eye as the origin is first established. Then the tilt state of the vehicle is decomposed into the rotation angle in three directions and the displacement in the vertical direction. Finally, the position of the projected image is corrected by inputting the tilt state of the vehicle so that the projected image can remain on the real object at all times. The simulation model is established in Unity3D. The effectiveness of the correction algorithm is verified by inputting the tilt state of the vehicle. The results show that the projected image can be correctly displayed on the real object under different tilt situations when the initial position of the real object is constant. When the initial position of the real object changes, the projection can also be correctly displayed on the real object in the same tilt state.