SEAL: Semantic Aware Image Watermarking

• URL: http://arxiv.org/abs/2503.12172v2
• Date: Wed, 09 Apr 2025 13:30:18 GMT
• Title: SEAL: Semantic Aware Image Watermarking
• Authors: Kasra Arabi, R. Teal Witter, Chinmay Hegde, Niv Cohen,
• Abstract summary: We propose a novel watermarking method that embeds semantic information about the generated image directly into the watermark.<n>The key pattern can be inferred from the semantic embedding of the image using locality-sensitive hashing.<n>Our results suggest that content-aware watermarks can mitigate risks arising from image-generative models.
• Score: 26.606008778795193
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Generative models have rapidly evolved to generate realistic outputs. However, their synthetic outputs increasingly challenge the clear distinction between natural and AI-generated content, necessitating robust watermarking techniques. Watermarks are typically expected to preserve the integrity of the target image, withstand removal attempts, and prevent unauthorized replication onto unrelated images. To address this need, recent methods embed persistent watermarks into images produced by diffusion models using the initial noise. Yet, to do so, they either distort the distribution of generated images or rely on searching through a long dictionary of used keys for detection. In this paper, we propose a novel watermarking method that embeds semantic information about the generated image directly into the watermark, enabling a distortion-free watermark that can be verified without requiring a database of key patterns. Instead, the key pattern can be inferred from the semantic embedding of the image using locality-sensitive hashing. Furthermore, conditioning the watermark detection on the original image content improves robustness against forgery attacks. To demonstrate that, we consider two largely overlooked attack strategies: (i) an attacker extracting the initial noise and generating a novel image with the same pattern; (ii) an attacker inserting an unrelated (potentially harmful) object into a watermarked image, possibly while preserving the watermark. We empirically validate our method's increased robustness to these attacks. Taken together, our results suggest that content-aware watermarks can mitigate risks arising from image-generative models.

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