Benchmarking and modernizing print-cam robust watermarking methods on modern mobile phones
1University of Oulu, Faculty of Information Technology and Electrical Engineering, Department of Information Processing Science, Information Processing Science
|Online Access:||PDF Full Text (PDF, 4.9 MB)|
|Persistent link:|| http://urn.fi/URN:NBN:fi:oulu-201504021271
|Publish Date:|| 2015-04-09
|Thesis type:||Master's thesis
Digital watermarking has generally been used for copy- and copyright protection, authentication and, more recently, value-added services. It has been restricted to digital world but by developing methods which are able to read a watermark from a printed image with a camera phone would enable the watermark extraction to be free of time and place. The aim of this work was to compare print-cam robust watermarking methods and illustrate the problems that emerge when the watermarking methods are implemented on a camera phone. This was achieved by selecting three print-cam robust watermarking methods and implementing them on a camera phone. The robustness of the methods was tested and the results reported. The obtained results showed that some changes are required to make the earliest proposed watermarking methods work on a modern camera phone. The robustness of the methods was in line with the intended applications as well as camera phone specifications.
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