🖼️ Image Watermarking App

A full-featured desktop application built with Python and Tkinter that allows users to add text or logo watermarks to images with powerful customization options.

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🎥 Demo

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🚀 Features

• ✅ Upload any image and add a custom watermark
• ✅ Add either text or logo (or both!) as a watermark
• ✅ Drag and drop to reposition the watermark on the image
• ✅ Customize text:
  • Font family
  • Font size
  • Text color
  • Opacity
• ✅ Resize logos dynamically
• ✅ Add multiple layers: text + logo
• ✅ Undo and Redo support (with full action history)
• ✅ Smart warning if watermark might get cut off
• ✅ Transparent checkerboard background preview
• ✅ Scrollable responsive UI for smaller windows

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🖼️ Screenshots

Initial View	Text Watermark	Logo Watermark	Undo/Redo

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🛠️ Tech Stack

• Python 3
• Tkinter (GUI)
• Pillow (PIL) – Image processing

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📚 What I Learned

This project helped solidify several key programming skills:

• 🧠 Object-Oriented Design: Using a WatermarkApp class to handle state and logic
• 🎨 GUI Development: Scrollable, dynamic interfaces in Tkinter
• 🖼️ Image Manipulation: Transparent overlays, layering, resizing, and blending
• 🕹️ Drag-and-Drop: Interactive repositioning of both text and logos
• 🔁 Undo/Redo: Implementing state history with deep copies
• ⚠️ UX Warnings: Dynamic validation and visual safeguards

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💾 How to Run

1. Clone the repo:

git clone https://github.com/Cyber-Security-Tech/image-watermarking-app

2. Install dependencies:

pip install pillow

3. Run the app:

python main.py

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📂 File Structure

image-watermarking-app/
├── main.py
├── ui.py
├── file_manager.py
├── watermark.py
├── assets/
│   └── checkerboard_bg.png
├── media/
│   ├── demo/
│   │   └── demo.gif
│   └── screenshots/
│       ├── initial_view.png
│       ├── text_watermark.png
│       ├── logo_watermark.png
│       └── undo_redo.png
└── README.md

• main.py / ui.py — App entry and GUI logic
• file_manager.py — Load/save helper functions
• watermark.py — Watermark rendering logic
• media/screenshots/ — App screenshots
• media/demo/ — Demo GIF
• README.md — This file

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🔮 Future Ideas

• Add watermark presets
• Option to batch watermark multiple images
• Save/export watermark styles
• Real-time zoom and pan controls

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This project demonstrates real-world GUI programming and image processing with Python.