再利用，算出水印密钥，进行水印提取。
再利用，S算出水印密钥，进行水印提取。
Then we compute the watermark key using and s and extract it.
算法包括水印嵌入和水印提取与检测两个部分。
The algorithm mainly consists of two basic subroutines: watermark embedding and watermark extraction and detection.
公有水印技术是在水印提取或检测时不需要原始照片参与。
The public watermarking technique can extract or detect watermarks without the original photo.
在提取水印时，不需要原始图像，完全实现了盲水印提取。
The blind watermark was realized as the original image don't be needed when extracting watermark.
最后分析了有攻击情况下水印提取错误率与水印容量的关系。
The capacity upon threshold can be calculating. At last, the relationship is analyzed between watermark extraction error rate and watermark capacity in attacking scenario.
水印提取过程中使用与嵌入过程中私钥相对应的公钥提取水印信息。
The watermark extraction used a public key corresponding to the private key in embedding procedure.
为了减少水印算法中设置阈值带来的不便，减少水印提取时的计算量。
In order to reduce inconvenience of setting threshold value in watermark algorithm, the amount of calculation is reduced to extracting watermark.
该方法嵌入的水印具有非常好的安全性，且水印提取不需要原始未加水印的图像。
The method has very good watermark security and the watermark is extracted without using original unwatermarked image.
在水印提取时，计算分块的新的均差值并与所设门限进行比较，从而检测嵌入的原始水印值。
Watermark detection is implemented by comparing the new difference of mean values of watermarked image blocks with the threshold values.
在进行水印盲检测时，首先对含水印图象进行归一化处理并提取特征点，然后进行水印提取。
In blind watermark detection process, we also extract the feature point from the normalized image, then extract the watermark.
水印提取时不需要原始文档和原始水印，通过块校验和海明校验可将破坏的水印比特位进行恢复。
Watermarking can be extracted without original document and original watermarking information. When the watermarking bit is destroyed, block checkout and hamming checkout are used to recover it.
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。
When extracting the watermark, determine the extracting location in accordance with the key, extract the binary watermark and then recover the gray image watermark.
实现了对基于路径的防篡改动态水印算法的验证，主要对水印嵌入和水印提取两个部分进行了测试。
Finally, the improved path based dynamic software watermarking algorithm is validated. Verification consists of watermarking embedding and watermarking retrieval.
利用混沌对初值极端敏感性的特点，能够定位检测对加入水印图像的窜改，并且水印提取不需要原始图像。
The proposed scheme is exploiting the high sensitivity on initial value of chaotic map, can localize the tampers on the watermarked image.
提出了稳健性好的图像盲水印算法：白色像素较多的图像加入水印后会产生大量溢出误差，从而很难将水印提取出来或者对图像质量造成严重下降。
Valid Blind Watermarking Algorithm On Image The images that have a lot of white pixels usually can produce a lot of overflows after being embedded the watermark.
该方法在一定的量化标准下利用小渡变换提取图象的特征信息，通过混沌序列对其加密生成数字水印。
In this method, the original image 's feature is extracted by using wavelet transform and quantization. The feature information is changed into watermark by the chaotic sequence encryption.
利用小波变换域中人眼的视觉特性，提出了一种提取水印时不需要原始图像的数字图像水印算法。
By making use of human sight property in wavelet domain, a binary image watermark algorithm without using the original image in the watermark extraction has been presented.
鉴别照片真伪时，从中提取数字水印。
We extract watermarking from the photo when reality of digital photograph is authenticated.
水印的提取不需要原始音频信号。
The watermark can be extracted without the original digital audio signal.
它将水印嵌入到数字图像中，通过对它的检测(提取)跟踪图像的使用情形，从而实现数字图像的秘密传输、存储、版权维护等功能。
It embeds watermarks into the digital images, then carries out the functions such as informations hiding, storing, copyright safeguarding by tracking the use of the image by detecting the watermarks.
该算法的水印检测过程是在提供原图的基础上进行水印的提取。
This algorithm needs original image to detect watermarking in the process of detecting watermarking.
水印的嵌入和提取算法都是公开的，公钥系统取代了普通的水印密钥。
The algorithms for the watermark embedding and extracting are both open, and public key cryptosystem is utilized instead of common watermark key.
相应地，可以把水印的检测过程看成是一个水印信号的解调过程，就是从宿主载体数据中提取水印信号。
Corresponding, may regard as the watermark examination process is a watermark signal demodulation process, is withdraws the watermark signal from the host carrier data.
该算法提取水印信息时不需要原始数字音频信号。
The proposed algorithm can extract the watermark without the help from the original digital audio signal.
该算法提取水印信息时不需要原始数字音频信号。
The proposed algorithm can extract the watermark without the help from the original digital audio signal.
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