This paper proposes a new design of overlayable transmissive color marker. Each marker is transparent and the marker has different colors, and outside of the marker is a region for estimating order of the overlay. ID patterns are detected from overlaid markers by splitting an input image in red, green and blue channel image. The overlaid order is estimated with the use of average color in the estimation area of overlaid order. Moreover this marker can estimate the relative degree of rotation angle between markers. To evaluate the performance of the proposed marker, we measured the misalignment which can be permitted when detecting each marker and the accuracy of estimated relative angle of the rotation. Moreover the maximum angle which can detect each marker between camera and marker is measured.
Asahi Suzuki, Yoshitsugu Manabe, Noriko Yata, Yuki Uranishi, "Overlayable and Rotation-free Transmissive Circular Color Marker for Augmented Reality" in Proc. IS&T CGIV 2012 6th European Conf. on Colour in Graphics, Imaging, and Vision, 2012, pp 115 - 120, https://doi.org/10.2352/CGIV.2012.6.1.art00021