石红芹,余鹰,王艳.一种基于NSCT与小波变换的全频域双水印算法[J].包装工程,2017,38(15):155-160.
SHI Hong-qin,YU Ying,WANG Yan.A Full Frequency-Domain Double-watermarking Algorithm Based on NSCT and Wavelet Transform[J].Packaging Engineering,2017,38(15):155-160. |
| 一种基于NSCT与小波变换的全频域双水印算法 |
| A Full Frequency-Domain Double-watermarking Algorithm Based on NSCT and Wavelet Transform |
| 投稿时间：2017-02-19 修订日期：2017-08-10 |
| DOI： |
| 中文关键词: NSCT分解 双水印 特征点 |
| 英文关键词: NSCT decomposition double-watermarking feature points |
| 基金项目:国家自然科学基金（61365008，61563016）；教育部人文社科基金（15YJA860013）；江西省科技厅工业支撑项目（20161BBE50092）；江西省自然科学基金（20151BAB217011） |
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| 中文摘要: |
| 目的 为了提高彩色图像的抗几何攻击能力，提出一种基于NSCT与离散小波变换的全频域彩色图像双水印算法。方法 基于Fibonacci变换对水印图像进行分块置乱加密，自适应地选择嵌入的强度因子，将彩色载体图像的y分量先分块，再进行NSCT分解，然后进行DWT变换，随机选择生成的嵌入数组，通过调节嵌入数组各块的奇异值将水印循环嵌入到载体图像中。对含水印图像提取其各分块最大奇异值二维量化生成零水印。结果 该算法的透明性良好，且能有效抵抗剪切、滤波、缩放、高斯噪声等常见的几何攻击。结论 算法解决了单水印功能单一双水印算法2种水印互相干扰的问题，可以对数字产品同时进行版权保护和内容认证，算法具有较好的鲁棒性和不可见性。 |
| 英文摘要: |
| The work aims to put forward a full frequency-domain color image double-watermarking algorithm based on NSCT and discrete wavelet transform, so as to improve the ability of color image to resist geometric attacks. Firstly, the blocks of watermark image were scrambled based on Fibonacci transform and the intensity factor embedded was adaptively selected. Then, y component of the color carrier image was firstly blocked and then subject to NSCT decomposition and DWT transform. The embedded array generated was randomly selected. The watermark was circularly embedded into the carrier image by regulating the singular value of each block of embedded array. The maximum singular value of each block was extracted from the watermarked image and 2D quantized to generate no watermarks. The simulation showed that, the proposed algorithm had good invisibility and effective robustness against such common geometric attacks as shearing, filtering, scaling and Gaussian noise. The algorithm has solved the problem of interference between single watermark function and single double-watermarking algorithm, and it can protect the copyright and verify the contents of digital products at the same time. Such algorithm has good robustness and invisibility. |
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