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<p>To solve the problem of copyright infringement in digital content, this paper proposes an adaptive blind color watermarking scheme using Hadamard transform and information mapping system. The information mapping system maps the watermark information to the appropriate range by convolutional coding and bit mapping to enhance the concealment and robustness. At the same time, the four-interval embedding technique is used to embed the mapped watermark information into the host image. In addition, the proposed adaptive embedding strategy uses the SURF operator to determine the appropriate region for embedding the watermark. Finally, in order to ensure the security of key information, the DNA encryption algorithm is optimized, the key is converted into base sequence, and the key space is expanded. Experimental results demonstrate: (1) PSNR mean greater than 40&#xa0;dB, SSIM mean greater than 0.97, ensuring high image quality; (2) The mean NC is greater than 0.95, and the mean BER is about 0.05, indicating that they are resistant to common attacks. (3) Time complexity is <i>O</i>(<i>nlog</i><sub><i>2</i></sub><sup><i>n</i></sup>), demonstrating good real-time performance; (4) Key space is 4<sup>595</sup>, providing higher security.</p>

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An Adaptive Blind Color Watermarking Scheme Based on Hadamard Transform and Information Mapping System

  • 期刊论文

  • 发表日期：

    2024年12月31日

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  • Yu Xia,
  • Xiaojie Tian,
  • Gang Wang,
  • Tao Yao,
  • Zengfeng Wang,
  • Qingtang Su

摘要

To solve the problem of copyright infringement in digital content, this paper proposes an adaptive blind color watermarking scheme using Hadamard transform and information mapping system. The information mapping system maps the watermark information to the appropriate range by convolutional coding and bit mapping to enhance the concealment and robustness. At the same time, the four-interval embedding technique is used to embed the mapped watermark information into the host image. In addition, the proposed adaptive embedding strategy uses the SURF operator to determine the appropriate region for embedding the watermark. Finally, in order to ensure the security of key information, the DNA encryption algorithm is optimized, the key is converted into base sequence, and the key space is expanded. Experimental results demonstrate: (1) PSNR mean greater than 40 dB, SSIM mean greater than 0.97, ensuring high image quality; (2) The mean NC is greater than 0.95, and the mean BER is about 0.05, indicating that they are resistant to common attacks. (3) Time complexity is O(nlog2n), demonstrating good real-time performance; (4) Key space is 4595, providing higher security.