A Road Surface Projection Method Using Motion-Blur Compensation Based on Traveling Speed
Summary
This study proposes a method to compensate in real time for motion blur caused by traveling speed when a mobile platform equipped with a compact high-speed projector projects information onto road surfaces while in motion. Projecting symbols such as shapes, text, and arrows onto road surfaces to intuitively convey intention to pedestrians and surrounding personnel has attracted considerable attention, but motion blur degrades the visibility of projected patterns during movement.
In the proposed method, a galvanometer mirror is placed in the projection optical path of a compact high-speed projector mounted on an Automated Guided Vehicle (AGV). The mirror angle is controlled in real time based on traveling speed measured by a photo reflector, thereby compensating for motion blur in the projected image.
Indoor experiments comparing projection results with and without the proposed compensation at a traveling speed of 1 m/s confirmed a clear improvement in the sharpness of the projected image. This method is expected to find broad application in safety signage by mobile robots in factories and warehouses, as well as in hazard warnings and route guidance projected around vehicles.
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References
- Y. Hiruma, Y. Moko, T. Hayakawa, A. Mino, M. Ishikawa, "A Road Surface Projection Method Using Motion-Blur Compensation Based on Traveling Speed," Proc. of the 26th SICE System Integration Division Annual Conference (SI2025), Hiroshima, Japan, Dec. 10, 2025, pp.1576-1578
