Uncolorable Examples: Preventing Unauthorized AI Colorization via Perception-Aware Chroma-Restrictive Perturbation

TL;DR

• Grayscale images resist unauthorized AI colorization: PAChroma protects monochrome content through Uncolorable Examples.
• Imperceptible perturbations restrict generated chroma: Designs transferable protection while preserving grayscale visual quality.
• Protection persists after common image processing: Tests robustness to compression and other transformations.

Futa Waseda

Project Assistant Professor