Geometrically Invariant Color Medical Image Null-Watermarking Based on Precise Quaternion Polar Harmonic Fourier Moments

Geometrically Invariant Color Medical Image Null-Watermarking Based on Precise Quaternion Polar Harmonic Fourier Moments
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基于精确四元数极调和傅立叶矩的几何不变彩色医学图像无水印

DOI:
10.1109/access.2019.2935174
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发表时间:
2019-08
期刊:
影响因子:
3.9
通讯作者:
Li Xiaoxiao
Li Xiaoxiao
中科院分区:
计算机科学3区
文献类型:
--
作者:
Xia Zhiqiu;Wang Xingyuan;Wang Mingxu;Unar Salahuddin;Wang Chunpeng;Liu Ying;Li Xiaoxiao

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传统的嵌入水印方案通过在原始图像中嵌入水印来实现图像的版权保护。此过程会使原始图像恶化,因此不适合医学图像。为了克服这一限制,本文提出一种基于四元数极调和傅立叶矩(QPHFM)的几何不变彩色医学图像零水印方案,在不改变原始医学图像的情况下实现版权保护。首先,设计了一种基于小波数值积分的高精度QPHFM计算方法,可以有效提高计算精度。然后基于精确QPHFM(PQPHFM)和混沌图,提出了一种鲁棒的彩色医学图像空水印方案,以保护彩色医学图像的版权。该方案利用PQPHFM来构造特征图像,其良好的稳定性和几何不变性使得所提出的空水印方案具有良好的鲁棒性和抵抗几何攻击的能力。大量的仿真实验表明,该方案在抵抗缩放、旋转、改变长宽比、翻转等常见攻击和几何攻击方面具有很强的鲁棒性。该方案的性能优于类似的鲁棒空水印方案和其他彩色医学图像水印方案。
The traditional embedded watermarking scheme achieves copyright protection of images by embedding watermarks into the original images. This process will deteriorate the original image, so it is not suitable for medical images. In order to overcome this limitation, this paper proposes a geometrically invariant color medical image null-watermarking scheme based on quaternion polar harmonic Fourier moments (QPHFM), which achieves the copyright protection without changing the original medical image. First, a high-precision QPHFM computation method based on wavelet numerical integration is designed, which can effectively improve the computation precision. Then based on the precise QPHFM (PQPHFM) and chaotic map, a robust null-watermarking scheme for color medical images is proposed to protect the copyright of color medical images. This scheme uses the PQPHFM to construct feature images and its good stability and geometric invariance make the proposed null-watermarking scheme has good robustness and resistance against geometric attacks. Extensive simulation experiments show that the proposed scheme is highly robust in resisting common attacks and geometric attacks such as scaling, rotation, change of length-width ratio, and flipping. The performance of the proposed scheme is superior to that of similar robust null-watermarking schemes and other color medical image watermarking schemes.
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