👻 Ghost Font Decoder

Reveal hidden messages from anti-AI motion fonts — the tool that reads what AI can't.

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Ghost Font (mixfont.com/ghost-font) is a new typeface designed to be unreadable by AI. It hides text as moving dots — invisible in any single frame, invisible to OCR, invisible to multimodal models like GPT-5 and Claude 4.

This decoder tracks those dots across all frames, rebuilds the motion trails, and reveals the hidden message. It even attempted OCR to read the result automatically.

Human-readable → ✅
AI-readable → only with this tool

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✨ Features

🎥 Drop any Ghost Font video	MP4, AVI, MOV, MKV
🔍 3 detection methods	Transition-tracking, dark-count, frame-diff
🤖 Auto OCR	EasyOCR reads the decoded image (best-effort)
📄 Export	PDF (image + text), TXT, PNG
🎛️ Tunable	Sensitivity (percentile), dilation, method
🎨 Dark UI	Modern Tkinter GUI with drag-drop

🚀 Quick Start

git clone https://github.com/roohan-514/ghost-decoder.git
cd ghost-decoder
pip install opencv-python numpy easyocr fpdf2 pillow
python main.py

🖥️ CLI

python cli.py video.mp4 -o result.png
python cli.py video.mp4 --pdf result.pdf
python cli.py video.mp4 -m transition -t 99 -b 8

🧠 How It Works

Video frames  →  detect dark moving dots  →  count transitions per pixel
  →  keep top 1% most-active pixels  →  dilate into letter shapes  →  OCR

1. Dot detection — finds dark moving pixels (value < 50) in each frame
2. Transition counting — tracks light→dark transitions per pixel; moving dots cause frequent transitions while static decoys don't
3. Percentile filtering — keeps only the most-active pixels where letter paths are traced
4. Dilation — connects nearby dots into readable strokes
5. OCR (optional) — EasyOCR attempts to read the final image

⚠️ Why This Matters

Ghost Font is part of a growing trend: anti-AI content designed to be readable only by humans. As AI gets better at OCR, vision, and understanding images, projects like Ghost Font fight back — and tools like this decoder exist at the boundary.

This is a cat-and-mouse game:

• AI generates undreadable fonts → humans build decoders
• AI improves → new anti-AI techniques emerge

We're building the tools that keep human communication human.

📸 Try It Yourself

1. Go to mixfont.com/ghost-font
2. Type a secret message
3. Download the video
4. Drop it into the decoder

🤝 Contributing

PRs welcome! Ideas:

• Better OCR preprocessing for ghost dots
• Video-native model integration
• A web version (WASM + OpenCV.js)
• Support for other anti-AI fonts

📜 License

MIT

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If AI won't read it — we will.
Star on GitHub · Try Ghost Font