GCM 854 Lecture Notes - Lecture 7: Omron, Digital Watermarking, Polycarbonate
16 Mar 2020
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Gcm 854 | week 7 - security features part 2. Security constellation - also known as omron rings or donuts, are a pattern of 5 rings, incorporated in a number of banknotes, allowing imaging software to detect and lock out counterfeit. Halo image - an image that is hidden within the printed background and can be revealed by using a decode lens with the correct line screen. Corner radius - a security feature that is very easy to implement. One of the 4 corner radiuses has a different size. Makes it very easy to verify without any additional tools. Planted defects - intentional defects for quick verification of authenticity of printed materials. These defects are intentionally small, and are not done in excess. Tamper evident - features that help indicate the existence of tampering or opening of the product prior to you. These features can be embedded during production or applied post production.
