PSYCH221: A survey of digital watermarking techniques
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Introduction: Methods: Conclusion: Contacts: |
Introduction
Motivation
Watermarking is not a new phenomenon. For nearly one thousand years, watermarks on paper have been used to identify a particular brand (in the case of publishers) and to discourage conterfeiting (in the case of stamps and currency) [11]. In the modern era, proving authenticity is becoming increasingly important as more of the world's information is stored as readily transferable bits. Digital watermarking is a process whereby arbitrary information is encoded into an image in such a way that the additional payload is imperceptible to the image observer. The purpose of this project is to document the development of digital watermarking algorithms through implementations. I am especially interested in how the human visual system can be exploited to increase payload capacity and decrease perceptibility. The watermarking algorithms implemented in this project are evaluated with the following considerations:
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