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Watermark for Digital Images

Summary: Purdue University researchers have developed a way for an owner to digitally "sign" an image by adding an invisible structure known as a digital watermark. The owner can identify changes made to the watermarked image with the verification algorithm. This test can allow images with minor alterations to still be authentic. JPEG image compression is compatible with this algorithm.

Technology Benefits: Rapid and robust authentication of imagesDecreased chances of forgery

Technology Application: Computer SecuritySoftware Industry

Detailed Technology Description: Edward DelpVIPER (Video and Image Processing Laboratory)Purdue Electrical and Computer EngineeringPurdue Biomedical Engineering

Countries: United States

Application No.: 6,625,295

*Abstract

*Background: The growth of networked multimedia systems has created a need for robust authentication of digital images. Currently, the owner of an image placed on a network has no method to detect altered copies of the image.

*IP Issue Date: Sep 23, 2003

*IP Type: Utility

*Stage of Development: Product

*Web Links: Purdue Office of Technology CommercializationPurdueInnovation and EntrepreneurshipEdward DelpVIPER (Video and Image Processing Laboratory)Purdue Electrical and Computer EngineeringPurdue Biomedical Engineering

Country/Region: USA

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