【摘要】 在数字水印的买卖交易应用中,卖方在交易前把买方的数字指纹和卖方的版权水印同时嵌入作品中。一旦作品受到侵犯,数字指纹和版权水印可以用来鉴别谁拥有合法版权,谁是非法转售者。提出了一种基于离散小波变换(DWT)的鲁棒买卖交易水印算法,该算法能够把数字指纹和版权水印同时嵌入一幅图像中。该算法有三个优点:在提取水印时不需要原始作品;水印嵌入后图像仍保持良好的不可感知性;具有抵抗多种攻击的鲁棒性。更多还原

【Abstract】 In a buyer-seller watermarking application,a seller should embed a buyer’s fingerprinting and seller’s watermark into the work before the sale of a work to a buyer.If the work is violated,the fingerprinting and watermark can be extracted to identify who holds the legal copyright of the work and trace the illegal reseller.A robust buyer-seller watermarking scheme is proposed based on discrete wavelet transform(DWT)which embeds the buyer’s fingerprinting and seller’s watermark into an image.The proposed scheme has the following advantages.Firstly,the extraction process does not require the original image.Secondly,the watermarked image maintains a good visual quality after embedding.Thirdly,the proposed scheme is robust against several image processing attacks.更多还原