Sascha Steinhoff
Digital Image Protection with
Invisible Watermarks
In the digital world, and especially on the Internet, where a mass of audio
and visual data is just a click away, people have very different views as to
what the terms ‘yours’ and ‘mine’ really mean. Visible watermarks are
simple to create and offer a fair degree of protection, while invisible
watermarks offer the advantage of retaining visual integrity while
confirming irrefutably who an image belongs to. We decided to test the
robustness of some of today’s invisible watermarking tools, and quickly
came to the conclusion that many of them simply aren’t up to scratch.