...摘要信息 参数,提出了一种基于Radon模糊变换(Radon-ambiguity transform,RAT)和分数阶傅里叶变换(fractional Fourier transform,FRFT)的离散谱校正估计方法.
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摘要：提出一种基于混沌映射和分数阶傅里叶变换的数字水印算法。
Absrtact: a digital watermarking algorithm is proposed based on chaotic map and fractional Fourier transform.
分数傅里叶变换具有空域和频域双域表达能力，可以对原始图像和水印信号分别进行不同阶次的分数傅里叶变换以增强水印安全性。
The FRFT has signal representation property both in space and frequency domain. The original image and the watermark is transformed with different orders to improve watermarking security.
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