CSE725

Watermarking dates back in History.

Cryptography for protection.

Need of software for ownership protection.

Definition

Imperceptible property

Robustness

Multiple watermarking (Discussed Later )

Information Embedded unit.

Info. Like owner, timestamp etc.

Watermark detection unit.

Perceptual Analysis Information Spreading Watermark Generation Secret Key

Detector provides binary output

Probability of detection and false alarm

European project

Various agents involved

Main application e-commerce

Entities involved.

Creation identification number.

Creator Creator provider Distributor Rights holder Number issuer Purchaser Trusted third party Search agent

Additive Noise Filtering Cropping Compression Rotation and Scaling Multiple watermarking.

Video Watermarking Audio Watermarking Hardware/Software Watermarking Text Watermarking Executable watermarks Labeling

Fingerprinting Copy and playback control

Questions?