Apparatus and methods for improving detection of watermarks in content that has undergone a lossy transformation

J Zhao, J Picard, N Thorwirth - US Patent 6,782,116, 2004 - Google Patents
------------713/176 that are used for authentication by employing a short (even Single-bit)
watermark vector to make the watermark and using the message needed for the …
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Apparatus and methods for improving detection of watermarks in content that has undergone a lossy transformation

J Zhao, J Picard, N Thorwirth - US Patent 6,782,116, 2004 - freepatentsonline.com
Techniques for improving detection of watermarks in content that has undergone a lossy
transformation. One of the techniques is used when the message that is contained in a …