A cross-medium real object image watermarking method and system based on a differentiable physical simulation

Abstract

The application discloses a cross-medium real image watermarking method and system based on a differentiable physical simulation, and the method comprises the following steps: importing or generating a paper material map of a target paper in rendering software, constructing a virtual printing scene, and pasting a real image sample containing watermarking data input to the surface of the paper material map to form a rendering image, and exporting a pair of supervised data sets; a batch of simulated printing and shooting image samples are generated by using a differentiable physical simulator; a pre-trained decoder is fine-tuned; the real image is input into the fine-tuned decoder to decode the watermarking data in the real image, and if the decoded watermarking data is inconsistent with the expected watermarking data or the decoding fails, the input real image is determined to be a fake real image. The application aims to solve the problems of insufficient robustness in a real scene, insufficient adaptability to a physical environment, and difficulty in accurately extracting environment-invariant watermarking features in the prior art.

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