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Additional info for Developments in Watermarking
This type of information is important to many different types of users. For example, every day in the US, thousands of advertisements run in thousands of markets across the country. With highly regionalised cable, satellite and terrestrial delivery, advertising agencies and their clients need to know that the advertisements they pay for are actually being broadcast. By using digital watermarking-based services, these companies can monitor broadcasts in major media markets around the world, verify compliance by broadcast partners, and measure the effectiveness of the campaign.
It involves a highly skilled process of selecting an image with enough detail to be rendered three-dimensionally. The dimensions will be reflected in various shades of grey. The image that is developed by an artist is then transferred to a mould cylinder, a process that takes eight to ten weeks. On a mould machine, the design is sewn on to the wire-covered cylinder so the paper is formed around the mark, giving a good clear watermark. Understandably, the production cost of the cylinder is quite high, but it becomes then the property of the customer.
Copy protection generally attempts to prevent the act of illegal copying by implementing active measures, whereas copyright protection attempts to prevent illegal copying of an original object by passive measures. An active measure clearly indicates that the copied object is not the original one or simply disables copying devices, whereas passive measures put the would-be copier simply on notice. In paper-based watermarking, the true watermark is considered the cream of the crop; it is virtually impossible to re-create an embedded watermark through the use of a copy machine, because a true watermark in essence is three-dimensional and that is not Page 35 © Copyright Pira International Ltd 2006 Developments in Watermarking Applications something that copy machines are capable ofreproducing.