When extracting the watermark, determine the extracting location in accordance with the key, extract the binary watermark and then recover the gray image watermark.
提取水印时，按照密钥确定水印提取位置，使用与嵌入互逆的方式提取二值水印，恢复为灰度水印。
A method of embedding a color digital watermark into a gray level image is proposed.
本文提出一种将彩色数字水印嵌入到灰度级图像中的方法。
Based on chaos theory, the gray image as watermark is encrypted.
基于混沌理论，对作为水印的灰度图像进行了加密的处理。
The limit that space domain only be applied in LSB under gray image of digital watermark was changed. Then, experiment showed that the method have a better adaptability to normal attack.
在灰度图像中的数字水印中，空间域方法只能用在LSB（最低有效位）的局限性，同时，实验表明对常规攻击具有较好的识别能力。
A gray level image with rich details is used as a watermark and embedded in vector transform domain, more than scalar transform domain used traditionally such as discrete cosine transform domain, etc.
本文提出了一种新的数字静止图像的水印嵌入算法，该算法将含有丰富细节信息的灰度级图像作为水印，水印嵌入过程不是在传统的标量变换域(如离散余弦变换域等)内进行，而是在矢量变换域实现。
The meaningful gray image is serially processed into watermark signal and embedded into the DC elements of the block DCT coefficient matrix of the host image.
该算法是先对有意义的灰度图像进行水印序列化处理后，再将其作为水印信号嵌入到载体图像的分块DCT系数直流分量里。
The frequency domain algorithm adopts the common and information - rich gray level image as a watermark, which achieves the collaborative advantages of combining the DWT and DCT.
该频域算法采用更常见的含信息量丰富的灰度图像作为水印，结合离散小波变换和离散余弦变换的共同优点。
The frequency domain algorithm adopts the common and information - rich gray level image as a watermark, which achieves the collaborative advantages of combining the DWT and DCT.
该频域算法采用更常见的含信息量丰富的灰度图像作为水印，结合离散小波变换和离散余弦变换的共同优点。
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