Print-based visual security features

Security features ensuring the authenticity of banknotes, checks, identity documents, diploma and business documents as well as of valuable goods are of high importance in today’s society. We briefly describe three security features that rely on color prediction models. The color prediction models are used both in forward mode to predict a color from given surface coverages of the inks and in inverse mode for computing the surface coverages of the inks in order to create a desired target color. After describing the security features, we will explain how the cellular ink-spreading enhanced Yule-Nielsen modified spectral Neugebauer model works and how it can be applied to create security features.