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About this paper
Kunal Bhosikar, Prajas Wadekar, Venkata Sai Pranav Bachina, Ankit Gangwal, Charu Sharma, Nicole Meng, Yingjie Lao
SHield embeds an owner’s image watermark in the spherical-harmonic coefficients of a 4D Gaussian Splatting model and verifies it directly from the model file. A private key selects Gaussians, and anchored optimization reduces rendering changes while preserving a recoverable signal. Across 150 image-payload models, minimum recovery correlation was 0.991; robustness applies to tested file changes, not arbitrary tampering.
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