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

Table 7

The ablation experiment of skip connection. Baseline: no attention model; +SE: add SE channel attention networks; +skip connection: based on SEnets, add a skip connection of LFCA.

(a)

Model	Metric	JPEG	Crop	Crop out	Drop out	GF
Baseline	PSNR	32.60	32.60	32.59	32.57	32.59
+SE		32.55	32.58	32.57	32.56	32.56
+skip connection (LFCA)		32.75	32.76	32.76	32.73	32.76
Baseline	SSIM	0.8150	0.8157	0.8149	0.8146	0.8150
+SE		0.8161	0.8165	0.8160	0.8157	0.8159
+skip connection (LFCA)		0.8263	0.8266	0.8263	0.8259	0.8265
Baseline	BER	3.09%	6.96%	0%	0.0007%	0.168%
+SE		2.19%	4.30%	0.0013%	0.0067%	0.0054%
+skip connection (LFCA)		1.94%	3.08%	0.0067%	0.0040%	0.228%

(b)

Salt&Pepper	GN	MF
32.59	32.59	32.58
32.55	32.56	32.55
32.75	32.76	32.75
0.8148	0.8153	0.8154
0.8156	0.8159	0.8160
0.8260	0.8271	0.8263
0.830%	1.23%	0%
0.813%	1.51%	0%
0.665%	0.859%	0%