Matrix headlight control loop for undistorted symbol projection

Projecting symbols onto road surfaces using matrix headlights enhances communication between automated vehicles and their environment. However, when such symbols are projected onto uneven road surfaces, the resulting distortions can significantly impair the legibility and interpretability of the projected information. This contribution presents an advanced feedback control methodology that mitigates these distortions by dynamically adjusting the projection parameters based on real-time analysis of the symbol's appearance on an imaginary plane. Unlike previous methods that rely on global optimization, which can introduce instability in abrupt symbol movements, the proposed approach uses a cascaded feedback control architecture. This architecture separates the control of the symbol's position and shape, allowing smoother transitions and improved robustness. The effectiveness of the proposed method is evaluated using a virtual simulation environment modeled after the German city of Lippstadt.