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Digital watermarking

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View Resource Watermarking

On October 9, 2003, a redesigned version of the $20 bill went into circulation in the U.S. Among other features, the bill includes watermarks that can be used to verify its authenticity. Traditional watermarking techniques are intended to prevent duplication, and digital watermarks have a similar purpose. They can be embedded into virtually any digital media, including images, audio and video, and...

https://scout.wisc.edu/report/nsdl/met/2003/1107
View Resource CoolTweak Screenshot

Do you work with images on a regular basis? And are you interested in adding watermarks to these images? This process just got much easier with CoolTweak. It's quite simple to add watermarks and to share photographs. The neat thing here is that visitors can add their own distinctive watermark by adding their own custom text or logo. This version of CoolTweak is compatible with all computers...

http://www.cooltweak.com/