L-split marker for augmented reality in aircraft assembly

Pengfei Han; Gang Zhao

doi:10.1117/1.OE.55.4.043110

29 April 2016 L-split marker for augmented reality in aircraft assembly

Pengfei Han, Gang Zhao

Author Affiliations +

Optical Engineering, Vol. 55, Issue 4, 043110 (April 2016). https://doi.org/10.1117/1.OE.55.4.043110

Abstract

In order to improve the performance of conventional square markers widely used by marker-based augmented reality systems in aircraft assembly environments, an L-split marker is proposed. Every marker consists of four separate L-shaped parts and each of them contains partial information about the marker. Geometric features of the L-shape, which are more discriminate than the symmetrical square shape adopted by conventional markers, are used to detect proposed markers from the camera images effectively. The marker is split into four separate parts in order to improve the robustness to occlusion and curvature to some extent. The registration process can be successfully completed as long as three parts are detected (up to about 80% of the area could be occluded). Moreover, when we attach the marker on nonplanar surfaces, the curvature status of the marker can be roughly analyzed with every part’s normal direction, which can be obtained since their six corners have been explicitly determined in the previous detection process. And based on the marker design, new detection and recognition algorithms are proposed and detailed. The experimental results show that the marker and the algorithms are effective.

Citation Download Citation

Pengfei Han and Gang Zhao "L-split marker for augmented reality in aircraft assembly," Optical Engineering 55(4), 043110 (29 April 2016). https://doi.org/10.1117/1.OE.55.4.043110

Published: 29 April 2016

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