A High-Accuracy Variable-Distance Target-Tracking System via Dual-Camera Information Interaction

The galvanometer-driven dual-camera systems can maintain a wide field of view while simultaneously capturing high-resolution details of targets in milliseconds, which is highly valuable for various high-speed tracking applications. Most existing systems utilize a precalibrated mapping function between image coordinates and pan-tilt mirror angles for dynamic target tracking. However, this ignores the dual-camera optical center misalignment, leading to severe system malfunctions when the target distance changes. To address this limitation, we propose a novel galvanometer-driven system that makes use of target information in both wide-view and zoom-in images for pan-tilt mirror angle modification, achieving high-accuracy target tracking at varying distances. Our proposed system introduces a practical dual-camera information interaction framework to accomplish iterative manipulation control of the galvanometer mirrors and adaptive adjustment of the coordinate-angle mapping function, improving the stability and precision of dynamic target tracking at varying distances. With a multithreaded task synchronization design, our developed framework enables the proposed system to remain target-to-track central-located within the zoom-in images without incurring extra time costs. Both qualitative and quantitative experimental results validate the superiority of our proposed system, extending the applicability of the galvanometer-driven dual-camera setup for target-tracking tasks over a wide range of distances.