SpecGuard: Spectral Projection-based Advanced Invisible Watermarking

• URL: http://arxiv.org/abs/2510.07302v1
• Date: Wed, 08 Oct 2025 17:56:21 GMT
• Title: SpecGuard: Spectral Projection-based Advanced Invisible Watermarking
• Abstract summary: We introduce SpecGuard, a novel watermarking approach for robust and invisible image watermarking.<n>We embed the message inside hidden convolution layers by converting from the spatial domain to the frequency domain.<n>We evaluate the proposed SpecGuard based on the embedded watermark's invisibility, capacity, and robustness.
• Score: 30.516775891273667
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Watermarking embeds imperceptible patterns into images for authenticity verification. However, existing methods often lack robustness against various transformations primarily including distortions, image regeneration, and adversarial perturbation, creating real-world challenges. In this work, we introduce SpecGuard, a novel watermarking approach for robust and invisible image watermarking. Unlike prior approaches, we embed the message inside hidden convolution layers by converting from the spatial domain to the frequency domain using spectral projection of a higher frequency band that is decomposed by wavelet projection. Spectral projection employs Fast Fourier Transform approximation to transform spatial data into the frequency domain efficiently. In the encoding phase, a strength factor enhances resilience against diverse attacks, including adversarial, geometric, and regeneration-based distortions, ensuring the preservation of copyrighted information. Meanwhile, the decoder leverages Parseval's theorem to effectively learn and extract the watermark pattern, enabling accurate retrieval under challenging transformations. We evaluate the proposed SpecGuard based on the embedded watermark's invisibility, capacity, and robustness. Comprehensive experiments demonstrate the proposed SpecGuard outperforms the state-of-the-art models. To ensure reproducibility, the full code is released on \href{https://github.com/inzamamulDU/SpecGuard_ICCV_2025}{\textcolor{blue}{\textbf{GitHub}}}.

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