ABSTRACT
This chapter discusses digital watermarking technology and how it can be used to protect digital documents. It explains the basic elements of a digital watermarking system from data embedding to data recovery. The given description is very general to avoid confusion with data-hiding applications. The chapter provides some application scenarios for watermarking techniques and explains how such tools can be implemented in practice by paying particular attention to digital assets representing Cultural Heritage. It discusses some concepts about the fundamental features of watermarking for digital images and for digital models. The chapter focuses on geometric data representation, provides a panoramic of the most used representations and presents the peculiarities of each. It illustrates the basic principles of texture-based three dimensional watermarking works of Garcia and Dugelay. The chapter considers as malicious all the manipulations explicitly aiming to remove the watermark and damage the hidden information; not-malicious are for example the manipulations not aimed at making the watermark unreadable.
