Recent Watermarking Patents of Digimarc Corporation: The Period between March ’12 - June ‘12
S. Geetha and Siva S.S. Sindhu
Affiliation: Department of Information Technology, Thiagarajar College of Engineering, Madurai – 15, India.
Digital watermarking technology remains an active area of study and development by a number of companies
and institutions since mid ‘90s. This area fetches more and more attention as one of the key technology components for
copyright protection, content management, and copy control of digital contents. This paper discusses the different patents
procured by Digimarc Corporation during the period between March 2012 and June 2012. The basic principles, the core
characteristics and the uniqueness of each patent are touched upon followed by a discussion on the most suitable application
each patent serves. The paper is organized around the application types namely - content identification and management,
content protection of image/video content, image quality control, document and image security, authentication of
content and objects. The challenges and the potential future scopes of the field are also pointed out.
Keywords: Copyright protection, content authentication, patent, state of the art, watermarking.
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