Digital Image Watermarking for Copyright Protection

Overview

This project implements a digital image watermarking system designed for copyright protection and ownership verification. A watermark is embedded into an original image, ownership information is split into multiple shares, and template matching techniques are used to verify ownership even if the image is stolen or modified.

The project demonstrates concepts from digital image processing, security, and multimedia authentication.

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Features

• Watermark embedding into digital images
• Master and ownership share generation
• Reconstruction of watermark from modified or stolen images
• Ownership verification using template matching
• Simulation of copyright infringement scenarios

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Tools & Technologies

• Python
• OpenCV
• NumPy
• Matplotlib

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Project Structure

Digital-Watermarking-main/
├── Code/
│   ├── watermark_generator.py
│   │   └── Embeds a watermark into the original image using XOR operations
│   │       and random point selection for secure embedding
│   │
│   ├── master_share_generator.py
│   │   └── Generates master shares for watermark verification by creating
│   │       secure shares based on image gradients and thresholding
│   │
│   ├── owernership_share_generator.py
│   │   └── Extracts ownership-related watermark data and generates
│   │       ownership verification shares
│   │
│   └── template_match_res.py
│       └── Performs template matching to verify watermark presence in
│           stolen, modified, or regenerated images
│
├── images/
│   ├── master_images/
│   │   └── Original images used for watermarking
│   │
│   ├── stolen_images/
│   │   └── Simulated stolen/modified images for testing
│   │
│   └── regenerated_watermarks/
│       └── Extracted and regenerated watermarks from stolen images
│
├── README.md
│   └── Project documentation and usage guide
│
└── .gitignore
    └── Git ignore configuration

Key Components

Component	Purpose	Input	Output
Watermark Generator	Embeds watermark into images	Original image, Watermark data	Watermarked image
Master Share Generator	Creates verification shares	Watermarked image	Master shares
Ownership Share Generator	Extracts ownership data	Watermarked image	Ownership shares
Template Matcher	Verifies ownership	Stolen image, Template	Matching confidence score

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How to Run

Prerequisites

pip install opencv-python numpy matplotlib