| 摘要 |
A method of using a sensing device to read coded data is provided. The coded data is arranged in accordance with a layout having mirror and n-fold rotational symmetry about a center of rotation, where n is at least two. The layout includes n identical first sub-layouts rotated 1/n revolutions apart about the center of rotation, and n identical second sub-layouts rotated 1/n revolutions apart about the center of rotation. Each second sub-layout is a reflection of a corresponding one of the first sub-layouts. At least one sub-layout includes rotation-indicating data that distinguishes that sub-layout from at least one other sub-layout and reflection-indicating data that distinguishes the reflections of reflected sub-layouts. The method includes sensing a layout using the sensing device, decoding the coded data of the sensed sub-layouts, thereby determining the rotation-indicating data of that sub-layout, and using the rotation-indicating data to interpret the meaning of the coded data.
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