| 摘要 |
A printed medium presenting a machine-readable visual representation, a generation process and a scanning process thereof. The printed medium comprises a first layer presenting a first visual element, the first visual element being associated with first information; and a second layer comprising a substrate containing a second visual element, the substrate capable of presenting different visual appearances of the second visual element when observed from different viewpoints or under different lighting conditions, at least a part of the second visual element visually representing second information, the first layer and the second layer being attached together at a relative position between first visual element and second visual element; wherein first visual element and second visual element constitute machine-readable visual representation, the visual representation capable of being scanned in a scanning process for verifying authenticity of the printed medium based on an association between the first information and the second information. |
