Table 2.

Quantitative performance comparison of PL-HB and SDPL-HB.

	IQA Metrics	PL-HB	SDPL-HB
			GR	SD	PS
λ = 20 σ = 0.06	PSNR(dB)	13.857	15.798	16.239	15.421
	MSSIM	0.823	0.880	0.889	0.868
	VIF	0.401	0.574	0.611	0.567
	MAE	0.091	0.064	0.059	0.065
	RMSE	0.203	0.162	0.154	0.169
	MPE	37.018	29.605	28.142	30.920
λ = 20 σ = 0.03	PSNR(dB)	15.838	17.277	17.353	17.134
	SSIM	0.880	0.914	0.916	0.912
	VIF	0.569	0.697	0.710	0.691
	MAE	0.064	0.049	0.049	0.050
	RMSE	0.162	0.137	0.136	0.139
	MPE	29.469	24.971	24.755	25.386
λ = 10 σ = 0.1	PSNR(dB)	14.387	16.176	16.149	15.974
	SSIM	0.837	0.888	0.887	0.883
	VIF	0.450	0.606	0.607	0.615
	MAE	0.083	0.059	0.059	0.059
	RMSE	0.191	0.155	0.156	0.159
	MPE	34.826	28.346	28.434	29.011
λ = 10 σ = 0.05	PSNR(dB)	15.564	17.086	17.086	16.938
	SSIM	0.872	0.909	0.909	0.908
	VIF	0.550	0.684	0.689	0.688
	MAE	0.067	0.050	0.050	0.051
	RMSE	0.167	0.140	0.140	0.142
	MPE	30.412	25.526	25.527	25.963