study the watermark calculate way is to want to can't see under premise, embed watermark possibly and much.
研讨水印算法就是要在保证不可见性的前提下,绝可能多地嵌入水印。
spectrum-warping audio watermarking based on shifting spectrum coefficients nonlinearly can embed watermark in full spectrum.
谱弯折方法实现整段频谱的非线性位移,可将水印嵌入整个频谱。
in order to embed watermark image, we process the watermark image by classification, one part embedded in space domain with blind w.
为实现水印图像的嵌入,将水印图像进行了分级处理,一部分作为盲水印在空域嵌入,另一部分作为公开水印在频域嵌入。
a security digital contract system in which hash and digital signature are used to embed watermark to a digital contract is implemented under a practical application.
本方案以在某企业的具体应用为背景实现了一套对电子合同进行散列、数字签名,然后通过水印技术将信息隐藏入合同的安全电子合同系统。
the robust performance of the embed watermark is enhanced by the information enlarged technique.
采用信息放大技术,加强水印的嵌入强度。
then we choose to embed watermark in the frequency sub-band.
于是选择将水印信息嵌入到中频子带中。
taking use of allowable distortion, we can embed watermark adaptively according contents of image to improve average embedding intensity effectively.
利用允许失真值与信噪比,达到根据图像内容自适应嵌入水印的目的,从而有效的提高水印的平均嵌入强度。