Research Article

[Retracted] Deep Image Watermarking to JPEG Compression Based on Mixed-Frequency Channel Attention

Figure 4

Robustness against different traditional noises. We tested different noises including those that were not included in the trained combined noise layer under strength factor . The combined noise layer consists of JPEG-Mask (), real JPEG (), identity, and crop (). Top: cover image ; second: encoded image ; third: noised image ; fourth: residual between and ; and bottom: the normalization of the residual signal.