A correlation function is used in the watermark detection process in two watermarking methods.

兩種水印算法的水印檢測都采用了相關函數(shù)來進行欧美一级婬片人妻欧美电影。

Starting from discrete cosine transformation, this paper presents a new way to embed digital watermark in images.

從離散余弦變換出發(fā)小一黄色网站在线观看，提出了一種圖象中植入數(shù)字水印的方法此16小美女毛片www。

Finally, simulation experiments of two algorithms are carried out, results demonstrate that the watermark is invisible and robust against some attacks, such as crop, common noise and JPEG compress. It also has certain counteractant ability against a comprehensive attack.

仿真結果表明欧美激情性A片在线观看⑧，實現(xiàn)的水印具有不可見性91亚洲精品福利在线播放，而且對于常見的噪聲、剪切男人的天堂在线无码视频网站、JPEG壓縮具有較強魯棒性午夜成年人网站，對于綜合性攻擊也具有一定的抵抗能力。

A new approach of digital watermark based on information optics is presented.

提出一種新的基于信息光學的數(shù)字水印方法www.污黄视频在线看。

One example is putting an invisible digital watermark in a digitized photograph.

一個示例是在數(shù)字化照片中放置不可見的數(shù)字水印人人人澡人人人看人人人看。

Digital watermark is a key research direction of information hiding technology.

數(shù)字水印是信息隱藏技術的一個重要研究方向。

The second one is a method based on Independent Component Analysis with reference signal. Unlike the former, this method can separate the estimating value of the watermark signal separately by using the information provided by the reference signal, so the computing complexity of the first method can be greatly decreased, at the same time, the shortcomings of the ICA based method, such as disorderliness and randomicity can be overcome.

第二種方法以帶參考信號的獨立分量分析算法為基礎狂插乱捅，通過參考信號提供的信息直接提取所需要的水印信號估計值2021偷窥自拍亚洲，克服了ICA算法在分離各路源信號時所具有的無序性和任意性的缺點，降低了第一種方法的運算復雜度国产一线在线观看。

While extracting the embedded watermark, only need scan the permutation order of 2x2 block for the disputant image, and need not compare the original image.

在取出浮水印時將從受測影像中取出2x2區(qū)塊像素間大小順序排列組合與之對照1级黄色免费片，此時不須參考原始影像資料即可取出浮水印。

Disputation about copyright can be settled down by using the watermark embedding technique presented in this paper.

利用本文的水印技術可以較好地解決版權爭議等問題黄色片你懂的。

Second, a robust digital watermark algorithm based on difference dither modulation is proposed.

其次美女裸体黄网站18禁止免费，提出了一種基于差值抖動調制的魯棒數(shù)字水印算法。