watermark error 中文意思是什麼
watermark error
解釋
水印錯誤-
The method generates a random sequence to identify the original recipient of the document by user register. then it uses the crc error coding technique to form a watermark sequence
即通過用戶信息注冊，產生與文本對應的一個偽隨機序列號，加入crc糾錯碼后，形成水印序列。 -
Then we use lifting scheme improve wavelet analysis methods and proposed a kind of digital watermark algorithm based on error - correcting coded which is a method of communication theory and is to correct watermark signal
然後在這一水印演算法的基礎上，使用小波提升技術來改進小波分析方法，再使用通信理論中的糾錯編碼方法對水印信號進行糾錯控制，並提出了一種基於糾錯編碼的數字水印演算法。 -
Experimental results show that the proposed techniques have good imperceptibility and can survive of common image processing operations and jpeg lossy compression with high robustness. the second one considered the watermarking system as a special digital communication system and introduced the ecc as channel coding technique. by using the turbo coding technique, we are able to reduce the watermark bit error rate and improve the robustness of the watermark so as to make counterfeiting attacks more difficult
本文在保證水印不可見性的基礎上和載體圖像的允許降質范圍內，利用rbf神經網路技術實現數字水印信息的最大強度嵌入以增強數字水印抵禦各種惡意攻擊的穩健性;在通信論和信息論模型基礎上，引入ecc （差錯控制編碼）技術降低水印的誤碼率，使得提取水印信息更加可靠，使可能的水印攻擊變得更加困難，從而獲得更好的水印穩健性和可靠性。 -
To solve the overflow or underflow of the components of appearance attributes caused by watermarking, we clip the error ones to the correct ranges by adjusting the corresponding basis function elements. the normalization operation would destroy the watermark embedded in the normal vector. the author presents a novel approach by rotating the normal vector around a fixed axis, which will modify its orientation, not magnitude
其中，針對在外觀屬性分量上植入水印的值溢出問題，作者提出了動態修改基函數的方法；考慮到直接修改法向量分量的方法會受到法向量單位化操作影響導致水印提取困難，作者提出一種繞固定軸旋轉法向量的方法，有效地避免了單位化對已植入水印信息的影響。 -
Because the watermark embedding and the noisy channel were directly related to the codeword index order in the model, at the same time deciding the codeword index was a np - hard problem typically, so the ant colony algorithm was introduced to optimize it in order to make the bit error rate lower and the embedded watermark more invisible
在該模型中，由於水印嵌入和通道噪聲直接與碼字索引相關，所以該模型誤差由索引值決定，又由於碼字索引的確定是np難度問題，故引入蟻群演算法對其優化是方便的，優化目標是降低誤碼率和使不可見性達到最佳。
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