1. Independent Utility Notice (Non-Affiliation)
FourTools is an independent, client-side open-source software project engineered and operated by FourMeter Studio (fourmeter.com).
2. Trademark Acknowledgments
The names Google, Google Gemini, Imagen, Veo, Google Flow, DeepMind, and SynthID, as well as associated logos, emblems, and visual marks, are registered trademarks of Google LLC or Alphabet Inc.
Any reference to these trademarks on this website is made solely for nominative, descriptive, and educational purposes under the fair use doctrine of United States and international trademark law. Such references serve exclusively to identify the technical origin and compatibility of user-supplied digital media files.
3. Visual Watermark vs. SynthID Provenance Disclosure
It is essential to understand the technical boundary of FourTools' functionality:
- What FourTools Does: FourTools calculates reverse linear alpha transparency matrices to recover original pixel values obscured by the semi-transparent 4-point sparkle logo in the corner of image and video frames.
- What FourTools Does NOT Do: FourTools does not alter, circumvent, spoof, or remove Google DeepMind's cryptographic SynthID digital provenance watermarks.
SynthID is imperceptibly embedded into the generative distribution noise across the entire image or video frame. Media cleaned with FourTools will typically still be correctly identified as AI-generated by DeepMind's provenance verification tools and cryptographic audit tools.
4. Educational & Digital Restoration Fair Use
Reverse alpha unblending algorithms and mathematical pixel reconstruction techniques are developed and published for educational research, digital preservation, and mathematical study under 17 U.S.C. § 107 (Fair Use).