将水印加在低频区域可以具有较好的鲁棒性

将水印加在高频区域可以获得较好的透明性, 但鲁

棒性差 将水印加在中频区是一种鲁棒性与透明性

的折中方案。-watermark added to the low-frequency region can have good watermark robustness added to the high frequency region can be made good through Ming, but the poor robust watermark added to the IF District is a robust and transparent nature of the compromise.