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Method for watermarking an electronically depicted image and detecting unauthorized image alterations

Summary
Shih- Fu Chang, Ph.D.
Technology Benefits
Method is secure and not vulnerable to attackSmall error rate for image generation Robust system flexible to accommodate modest degree of image manipulation while maintaining low tolerance for large image alterationsPatent information:Patent Pending (WO/2003/003285)Tech Ventures Reference: IR M02-013
Technology Application
System for image watermarkingMethod for watermark forgery identificationElectronic signature generation
Detailed Technology Description
Shih- Fu Chang, Ph.D.
*Abstract
None
*Inquiry
Satish RaoColumbia Technology VenturesTel: (212) 854-8444Email: TechTransfer@columbia.edu
*IR
M02-013
*Principal Investigator
*Publications
Lin, C. Y., Chang, S. F. "Semi-Fragile Watermarking for Authenticating JPEG Visual Content." Proc. SPIE, Security and Watermarkering of Multimedia Contents. Jan 2000 140-151.
*Web Links
WIPO: WO03003276USPTO_1: US 2005-0129268 A1USPTO_2: US 2005-0123167 A1
Country/Region
USA

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