CAJ | 학술논문

将水印信息嵌入到载体图像多尺度分解后的高频和低频系数中，选取合适的嵌入强度。由于多尺度下的高频部分仍然可以看成是前一尺度的部份低频成分。因此在图像多尺度小波变换的基础上加入水印，即使在传输过程遇到量化舍弃、低通滤波等情况，也不会完全丢失高频成分，能随之保全水印信息。满足了水印系统不可见性和鲁棒性的要求。
장수인신식감입도재체도상다척도분해후적고빈화저빈계수중，선취합괄적감입강도。유우다척도하적고빈부분잉연가이간성시전일척도적부빈저빈성분。인차재도상다척도소파변환적기출상가입수인，즉사재전수과정우도양화사기、저통려파등정황，야불회완전주실고빈성분，능수지보전수인신식。만족료수인계통불가견성화로봉성적요구。
This text makes watermark images embedded into the multi - scale decomposition of the carrier - frequency and low frequen- cy coefficients, selects the appropriate embedding strength. As the multi - scale high - frequency can be seen as part of the previous scale low - frequency components, In multi - scale image based on wavelet transform by adding a watermark, the image transmissions even in the face during the lowpass filtering, quantization give up, etc. the high frequency components will not be completely lost, the watermark can be followed to be preserved. The system can meet the requirements of its visibility and robustness.