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An improved blind watermarking method facing dual color images based on Hadamard transform

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Abstract

This paper proposes a blind color image watermarking method based on Hadamard transform to deal with the infringement of color images in the complex network environment. First of all, the color watermark image is channeled and each pixel in the channel image is converted into an 8-bit binary code. And then, the color host image is also channeled and expanded into 4 × 4 non-overlapping pixel blocks based on the selected embedding position. Finally, Hadamard transform is put on the pixel block, and 1-bit watermark information is embedded by the coefficient pair of the first line of Hadamard coefficient matrix. When extracting watermark, the watermark can be extracted only by comparing the size relationship of the coefficient pairs without the help of the original image. In this paper, a voting system of the minority obeying the majority is designed and implemented, which actually enhances the robustness of the method. In addition, a high security encryption system is designed by combining symmetric key and public key, and the correlation between RGB color channels is considered. Simulation results show that the proposed method has better robustness, real-time performance and security compared with similar methods, and meets certain requirements in terms of invisibility and capacity.

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Data availability

The datasets generated during the current study are available from the corresponding author on reasonable request.

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Funding

The study was funded by National Natural Science Foundation of China (Grant Nos. 62171209, 61771231), Key Project of Shandong Natural Science Foundation (Grant No. ZR2020KF023), Shandong Big Data Development and Innovation Laboratory of Public Resources (Grant No. 20220623), and China Scholarship Council (Grant No. 202008370052).

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Contributions

All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by SC, QS, HW and GW. The first draft of the manuscript was written by SC and QS, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Qingtang Su.

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Chen, S., Su, Q., Wang, H. et al. An improved blind watermarking method facing dual color images based on Hadamard transform. Soft Comput 27, 12517–12538 (2023). https://doi.org/10.1007/s00500-023-07898-3

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  • DOI: https://doi.org/10.1007/s00500-023-07898-3

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