Abstract
The present study proposes a mark-on-windshield warning system for vehicles that allows the driver to see potentially hazardous objects in front of the vehicle without taking his eyes off the road. An identified target is used to construct the line-of-sight equation based on the coordinate system of the moving vehicle. The explicit equation of the intersection point of the line of sight and the windshield surface is derived using an algebraic method. A warning mark is projected at the intersection point on the windshield by a two-degree-of-freedom laser projector unit, allowing the driver to easily identify the obstacle. An augmented reality verification platform is constructed to demonstrate the feasibility of the proposed system.
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