提出了一种新的混沌序列扩频水印算法。
A new chaos-based spread spectrum watermarking algorithm is developed in the wavelet domain for still images.
本文基于三维离散余弦变换（3D-DCT）技术和扩频通信技术提出三维体数据鲁棒水印嵌入算法。
This paper proposes a robust watermarking algorithm for volume data based on three-dimension discrete cosine transform(3D-DCT) and spread-spectrum communication technique.
实验表明，该算法有效降低了检测错误的概率，显著地提高了扩频水印的抗攻击能力。
Experimental results demonstrate that the proposed algorithm is more tamper resistant than general spread spectrum watermark algorithm and the false detection rate is decreased considerably.
水印对剪切、JPEG有损压缩、中值滤波、抵抗噪声干扰等常规图像处理手段比较其他的随机序列扩频算法具有更好的鲁棒性。
Compared with the other spread spectrum algorithm, this one is more robust against the typical image processing attacks such as adding noise, filtering and JPEG compression.
算法将原始水印利用扩频通信技术生成能够直接嵌入的水印信息；
Original watermark is mapped to watermark information, which can be directly embedded to the host, with spread-spectrum communication technique.
在分析了自适应小波变换和扩频特性关系的基础上，提出一种基于小波变换的扩频数字水印算法。
The relation between the digital watermarking and spread-spectrum was analyzed at first, A spread-spectrum adaptive digital watermarking scheme based on the wavelet transform was proposed.
在分析了自适应小波变换和扩频特性关系的基础上，提出一种基于小波变换的扩频数字水印算法。
The relation between the digital watermarking and spread-spectrum was analyzed at first, A spread-spectrum adaptive digital watermarking scheme based on the wavelet transform was proposed.
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