UltraArUco is a lightweight library and framework for mobile augmented reality (AR) marker-based tracking. It reduces per-frame latency by six times compared to standard OpenCV-based implementations while maintaining high accuracy. The system consists of a multilingual wrapper, a distributed Wi-Fi architecture, and a PC-based visual application that enables responsive interactions with a mobile device's camera input. UltraArUco is suitable for resource-constrained mobile AR applications and has been validated through an interactive piano simulation. --- Why it matters: This matters to engineers working on mobile AR because it provides a low-latency tracking system that can be used in resource-constrained environments, making it more accessible for various applications such as music or gaming. Source: https://arxiv.org/abs/2608.13584