The watermark can be detected with zero error probability even if the quality of watermarked image is as poor as 26 dB in PSNR after corrupted by additive Gaussian noise.

傳統(tǒng)的加密系統(tǒng)在數(shù)據(jù)傳輸過程中雖有保護(hù)作用亚洲欧洲日韩黄片一区二区，但數(shù)據(jù)一旦被接收并解密，其保護(hù)作用也隨著消失日韩无码国产精品视频。因此只能滿足有限的要求[191色狼播，2 ] 。作為數(shù)字媒體版權(quán)保護(hù)的有效手段[3 精品无码视频在线观看，4 ] AV琪琪，數(shù)

The elliptical watermark is embedded additively in the spatial domain. The experimental results illustrate that the proposed scheme can resist kinds of geometric attacks.

實驗結(jié)果表明該算法能有效抵御包括全局幾何攻擊和局部幾何攻擊在內(nèi)的多類攻擊。

Amarantine may have paled in comparison to Watermark or Shepherd Moons, but its under-produced (in Enya-world) balladry was a small leap forward for the reclusive Irish superstar.

專輯介紹：經(jīng)過兩年的努力《冰雪的歌謠》在位于都柏林附近的 Aigle 錄音室完成制作国产无套粉嫩白浆在线观看麻豆，誠然又是恩雅這個有著長期合作關(guān)系的富于非凡創(chuàng)造力的小組之又一個心血結(jié)晶黄片免费观看2019。

Plentiful emulation experiments show that the algorithm ensures the watermark's imperceptibility and robustness, and is also robust to familiar image processing such as JPEG compression , noise contamination, cropping, zoom and circumrotate etc.

通過大量的仿真實驗，證明本文算法在保證水印不可見性的同時欧美伦，對常見的圖像處理午夜福利A片视频www，如JPEG壓縮、噪聲自拍日韩在线观看免费、剪切又爽又色的网站、縮放以及濾波等，均具有較好的魯棒性国产91调教丝袜在线。

It is experimently proved that our blind watermark algorithm based on BSS is satisfying.

實驗證明完全免费的黄色视频在线观看，這種基于盲信號分離的盲水印算法效果令人滿意。

The second method makesfull use of HVS, and is in favor of invisibility and fragileness of the watermark.

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This thesis proposes a lossless digital watermarking algorithm based on Harr wavelet transform, which can recover the original image without any distortion from the marked image after the watermark has been extracted.

提出了基于Harr小波的彩色圖像可逆水印算法，采取閉環(huán)控制自適應(yīng)地修改其高頻子帶系數(shù)以嵌入水印91自拍偷拍论坛欧美性爱。

Considering the requirement of watermarks robustness and imperception, we present a method which can definite the intensity of the image embedded by digital watermark by the content of image.

兼顧數(shù)字水印的穩(wěn)健性和不可見性要求国产色视频一区，提出一種根據(jù)圖像內(nèi)容確定嵌入數(shù)字水印圖像強(qiáng)度的方法。

Computer simulations show that the embedded watermark is imperceptive.

仿真結(jié)果也證明了這一點九九亚洲精品自拍。

The watermark information which is generated by subsidiary secret keys of binary sequence can prove copyright of composer intuitionally.

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