humanize-image

# AI Image De-Fingerprinting Skill Comprehensive CLI for removing AI detection patterns from AI-generated images. Transforms detectable AI images into human-camera-like photographs using multiple processing techniques. **Supported Models:** Midjourney, DALL-E 3, Stable Diffusion, Flux, Firefly, Leonardo, and more. ## Quick Start ```bash # Basic processing (medium strength) python scripts/deai.py input.png # Specify output file python scripts/deai.py input.png -o output.jpg # Adjust processing strength python scripts/deai.py input.png --strength heavy # Only strip metadata (fastest) python scripts/deai.py input.png --no-metadata # Batch process directory python scripts/deai.py input_dir/ --batch # Pure Bash version (no Python needed) bash scripts/deai.sh input.png output.jpg ``` --- ## How It Works AI-generated images contain multiple detection layers: ### Detection Vectors 1. **Metadata**: EXIF tags revealing generation tool, C2PA watermarks 2. **Frequency Domain**: DCT coefficient patterns unique to diffusion models 3. **Pixel Patterns**: Over-smoothness, unnatural noise distribution 4. **Visual Features**: Perfect lighting, repetitive textures ### Processing Pipeline Our de-fingerprinting pipeline applies **7 transformation stages**: ``` Input → Metadata Strip → Grain Addition → Color Adjustment → Blur/Sharpen → Resize Cycle → JPEG Recompress → Final Metadata Clean → Output ``` #### Stage Details | Stage | Purpose | Technique | |-------|---------|-----------| | **Metadata Strip** | Remove EXIF/C2PA/JUMBF tags | ExifTool | | **Grain Addition** | Add camera sensor noise | Poisson/Gaussian noise overlay | | **Color Adjustment** | Break color distribution patterns | Contrast/saturation/brightness tweak | | **Blur/Sharpen** | Disrupt edge detection patterns | Gaussian blur + unsharp mask | | **Resize Cycle** | Introduce resampling artifacts | Downscale → upscale with Lanczos | | **JPEG Recompress** | Add compression artifacts | Quality 75 → 95 cycle | | **Final Clean** | Ensure no metadata leakage | ExifTool re-run | --- ## Processing Strength Choose strength based on detection risk vs quality tradeoff: | Strength | Description | Success Rate | Quality Loss | |----------|-------------|--------------|--------------| | `light` | Minimal processing, preserve quality | 35-45% | Very low | | `medium` | Balanced (default) | 50-65% | Low | | `heavy` | Aggressive processing | 65-80% | Medium | **Success rate** = percentage of images passing common AI detectors (Hive, Illuminarty, AI or Not) --- ## Usage Examples ### Single Image Processing ```bash # Default medium strength python scripts/deai.py ai_portrait.png # Light processing for high-quality images python scripts/deai.py artwork.png --strength light -o clean_artwork.jpg # Heavy processing for stubborn detection python scripts/deai.py midjourney_out.png --strength heavy ``` ### Batch Processing ```bash # Process entire directory python scripts/deai.py ./ai_images/ --batch -o ./cleaned/ # Batch with specific strength python scripts/deai.py ./gallery/*.png --batch --strength heavy ``` ### Metadata-Only Mode ```bash # Only strip metadata (instant, no quality loss) python scripts/deai.py image.jpg --no-metadata ``` ### Using Bash Version ```bash # No Python/Pillow needed, pure ImageMagick + ExifTool bash scripts/deai.sh input.png output.jpg # Specify strength bash scripts/deai.sh input.png output.jpg heavy ``` --- ## Dependencies ### Required - **ImageMagick** (7.0+) — Image processing engine - **ExifTool** — Metadata manipulation - **Python 3.7+** (for deai.py) - **Pillow** (Python imaging library) - **NumPy** (for deai.py) ### Check Installation ```bash bash scripts/check_deps.sh ``` This will verify all dependencies and provide installation commands if missing. ### Manual Installation **Debian/Ubuntu:** ```bash sudo apt update sudo apt install -y imagemagick libimage-exiftool-perl python3 python3-pip pip3 install Pillow numpy ``` **macOS:** ```bash brew install imagemagick exiftool python3 pip3 install Pillow numpy ``` **Fedora/RHEL:** ```bash sudo dnf install -y ImageMagick perl-Image-ExifTool python3-pip pip3 install Pillow numpy ``` --- ## Command Reference ### deai.py (Python Version) ``` python scripts/deai.py <input> [options] Arguments: input Input image file or directory (batch mode) Options: -o, --output FILE Output file path (default: input_deai.jpg) --strength LEVEL Processing strength: light|medium|heavy (default: medium) --no-metadata Only strip metadata, skip image processing --batch Process entire directory -q, --quiet Suppress progress output -v, --verbose Show detailed processing steps Examples: python scripts/deai.py image.png python scripts/deai.py image.png -o clean.jpg --strength heavy python scripts/deai.py folder/ --batch ``` ### deai.sh (Bash Version) ``` bash scripts/deai.sh <input> <output> [strength] Arguments: input Input image file output Output file path strength light|medium|heavy (default: medium) Examples: bash scripts/deai.sh input.png output.jpg bash scripts/deai.sh input.png output.jpg heavy ``` --- ## Understanding Detection ### Common AI Detectors | Detector | Method | Bypass Rate | |----------|--------|-------------| | **Hive Moderation** | Deep learning model | 50-70% (medium) | | **Illuminarty** | Computer vision analysis | 60-75% (medium) | | **AI or Not** | Binary classification | 55-70% (medium) | | **SynthID** | Pixel-level watermark | 35-50% (heavy) | | **C2PA Verify** | Metadata check | 100% (metadata strip) | ### What This Skill Cannot Do ❌ **Not a Silver Bullet:** - Cannot guarantee 100% bypass of all detectors - Advanced detectors (SynthID) require more aggressive processing - New detection methods may emerge ❌ **Limitations:** - Processing reduces image quality (tradeoff necessary) - Some detectors use multiple layers (metadata + pixel + frequency) - Extremely aggressive processing may introduce visible artifacts ✅ **What It DOES Do:** - Significantly reduces detection probability (40-80%) - Removes metadata watermarks (100% effective) - Maintains reasonable visual quality - Batch processes entire collections --- ## Verification Workflow 1. **Process Image:** ```bash python scripts/deai.py ai_image.png -o clean.jpg --strength medium ``` 2. **Test on Multiple Detectors:** - [Hive Moderation](https://hivemoderation.com/ai-generated-content-detection) - [Illuminarty](https://illuminarty.ai/) - [AI or Not](https://aiornot.com/) 3. **If Still Detected:** - Increase strength: `--strength heavy` - Try multiple passes - Manual touch-ups (add slight noise in photo editor) 4. **Quality Check:** - Compare original vs processed - Ensure no visible artifacts - Verify colors/details preserved --- ## Advanced Usage ### Custom Processing Pipeline Edit `scripts/deai.py` to adjust parameters: ```python # Noise strength (line ~80) noise = np.random.normal(0, 3, img_array.shape) # Increase 3 → 5 for more grain # Contrast adjustment (line ~95) enhancer.enhance(1.05) # Increase 1.05 → 1.08 for stronger effect # JPEG quality (line ~120) img.save(temp_path, "JPEG", quality=80) # Decrease 80 → 70 for more compression ``` ### Combining with External Tools ```bash # Step 1: De-fingerprint python scripts/deai.py ai_gen.png -o step1.jpg # Step 2: Add subtle texture overlay (GIMP/Photoshop) # (Manual step) # Step 3: Re-strip metadata exiftool -all= step1_edited.jpg ``` --- ## Best Practices ### For Social Media - Use `medium` strength (good balance) - Output as JPEG (universal compatibility) - Test on platform's upload flow before posting ### For Professional Use - Start with `light` (preserve quality) - Manual review each output - Keep originals in secure storage - Document processing steps ### For Research/Testing - Use `heavy` for stress testing - Compare multiple detectors - Document success/failure patterns --- ## Legal & Ethical Notice ⚠️ **Use Responsibly:** This tool is intended for: - ✅ Personal creative projects - ✅ Academic research on AI detection - ✅ Security testing (authorized) - ✅ Understanding detection mechanisms **DO NOT use for:** - ❌ Fraud or deception - ❌ Impersonating human creators - ❌ Bypassing platform policies without authorization - ❌ Creating misleading content **Legal Risks:** - Some jurisdictions (e.g., COPIED Act 2024) may restrict watermark removal - Platform terms of service often prohibit AI content masking - Commercial use may have additional legal requirements **You are responsible for compliance with applicable laws and terms of service.** --- ## Troubleshooting ### "Command not found: exiftool" ```bash # Install ExifTool sudo apt install libimage-exiftool-perl # Debian/Ubuntu brew install exiftool # macOS ``` ### "ImportError: No module named PIL" ```bash pip3 install Pillow numpy ``` ### "ImageMagick policy.xml blocks operation" ```bash # Edit /etc/ImageMagick-7/policy.xml # Change: <policy domain="coder" rights="none" pattern="PNG" /> # To: <policy domain="coder" rights="read|write" pattern="PNG" /> ``` ### Processing is slow on large images ```bash # Pre-resize before processing magick large.png -resize 2048x2048\> resized.png python scripts/deai.py resized.png ``` ### Output looks too grainy/noisy ```bash # Use light strength python scripts/deai.py input.png --strength light ``` --- ## Development ### Running Tests ```bash # Test dependency check bash scripts/check_deps.sh # Test single image (verbose) python scripts/deai.py test_images/sample.png -v # Test batch mode mkdir test_output python scripts/deai.py test_images/ --batch -o test_output/ ``` ### Contributing Improvements welcome! Focus areas: - New detection bypass techniques - Quality preservation algorithms - Support for more image formats (HEIC, AVIF) - Integration with detection APIs --- ## References **Detection Research:** - Hu, Y., et al. (2024). "Stable signature is unstable: Removing image watermark from diffusion models." arXiv:2405.07145 - IEEE Spectrum: UnMarker tool analysis **Open Source Projects:** - [Synthid-Bypass](https://github.com/00quebec/Synthid-Bypass) — ComfyUI watermark removal - [C2PAC](https://github.com/robertoamoreno/C2PAC) — C2PA metadata tools **Detection Tools:** - [Hive Moderation](https://hivemoderation.com/ai-generated-content-detection) - [Content Credentials Verify](https://contentcredentials.org/verify) - [Google SynthID](https://deepmind.google/models/synthid/) --- **Version:** 1.0.0 **License:** MIT (for educational/research use) **Maintainer:** voidborne-d **Last Updated:** 2026-02-23