Occlusion handling using moving volume and ray casting techniques for augmented reality systems

Tian, Yuan; Wang, Xuefan; Yao, Hongxun; Chen, Jia; Wang, Zhifeng; Liu, Yi

doi:10.1007/s11042-017-5228-2

Cited by 10 publications

(1 citation statement)

References 21 publications

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“…The main reason is that the spatial relationships in AR involve complex spatial semantics and specific 3D rendering issues. Different from traditional 2D/3D GIS, AR-GIS needs to determine the correct relationship between real and digital space [45], digital elements placement [25,46] including occlusion [47,48] and avoidance [10]. These tasks are crucial in AR-GIS because they are responsible of the spatial semantic constraints between the digital entities and the real environments.…”

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confidence: 99%

An Accurate and Efficient Quaternion-Based Visualization Approach to 2D/3D Vector Data for the Mobile Augmented Reality Map

Wang

Huang

Shi

2022

IJGI

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Increasingly complex vector map applications and growing multi-source spatial data pose a serious challenge to the accuracy and efficiency of vector map visualization. It is true especially for real-time and dynamic scene visualization in mobile augmented reality, with the dramatic development of spatial data sensing and the emergence of AR-GIS. Such issues can be decomposed into three issues: accurate pose representation, fast and precise topological relationships computation and high-performance acceleration methods. To solve these issues, a novel quaternion-based real-time vector map visualization approach is proposed in this paper. It focuses on precise position and orientation representation, accurate and efficient spatial relationships calculation and acceleration parallel rendering in mobile AR. First, a quaternion-based pose processing method for multi-source spatial data is developed. Then, the complex processing of spatial relationships is mapped into simple and efficient quaternion-based operations. With these mapping methods, spatial relationship operations with large computational volumes can be converted into efficient quaternion calculations, and then the results are returned to respond to the interaction. Finally, an asynchronous rendering acceleration mechanism is also presented in this paper. Experiments demonstrated that the method proposed in this paper can significantly improve vector visualization of the AR map. The new approach, when compared to conventional visualization methods, provides more stable and accurate rendering results, especially when the AR map has strenuous movements and high frequency variations. The smoothness of the user interaction experience is also significantly improved.

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