Gain level 2 (Table 1 column 2)

Truth	PSNR 0.0, SSIM 1.0	PSNR 0.0, SSIM 1.0	PSNR 0.0, SSIM 1.0	PSNR 0.0, SSIM 1.0
Ref. frame	PSNR 17.64, SSIM 0.576	PSNR 22.48, SSIM 0.414	PSNR 21.93, SSIM 0.589	PSNR 23.23, SSIM 0.673
Average	PSNR 16.59, SSIM 0.455	PSNR 18.08, SSIM 0.365	PSNR 23.46, SSIM 0.659	PSNR 19.7, SSIM 0.581
HDR+	PSNR 20.63, SSIM 0.672	PSNR 25.81, SSIM 0.547	PSNR 26.91, SSIM 0.758	PSNR 26.93, SSIM 0.782
NLM	PSNR 22.53, SSIM 0.709	PSNR 29.4, SSIM 0.807	PSNR 27.13, SSIM 0.751	PSNR 26.97, SSIM 0.751
VBM4D	PSNR 24.15, SSIM 0.809	PSNR 30.75, SSIM 0.833	PSNR 27.83, SSIM 0.775	PSNR 28.52, SSIM 0.804
Ours (DRN)	PSNR 25.64, SSIM 0.867	PSNR 31.96, SSIM 0.881	PSNR 30.08, SSIM 0.878	PSNR 29.01, SSIM 0.856
Ours (KPN)	PSNR 25.84, SSIM 0.881	PSNR 32.18, SSIM 0.884	PSNR 31.09, SSIM 0.904	PSNR 29.36, SSIM 0.876

Gain level 4 (Table 1 column 3)

Truth	PSNR 0.0, SSIM 1.0	PSNR 0.0, SSIM 1.0	PSNR 0.0, SSIM 1.0	PSNR 0.0, SSIM 1.0
Ref. frame	PSNR 14.02, SSIM 0.362	PSNR 18.76, SSIM 0.27	PSNR 17.38, SSIM 0.385	PSNR 18.0, SSIM 0.469
Average	PSNR 15.22, SSIM 0.339	PSNR 17.41, SSIM 0.248	PSNR 22.1, SSIM 0.531	PSNR 19.39, SSIM 0.501
HDR+	PSNR 16.84, SSIM 0.46	PSNR 22.08, SSIM 0.374	PSNR 22.56, SSIM 0.567	PSNR 23.11, SSIM 0.619
NLM	PSNR 19.92, SSIM 0.541	PSNR 26.19, SSIM 0.656	PSNR 24.67, SSIM 0.65	PSNR 24.71, SSIM 0.68
VBM4D	PSNR 21.1, SSIM 0.634	PSNR 27.77, SSIM 0.743	PSNR 25.36, SSIM 0.669	PSNR 26.23, SSIM 0.721
Ours (DRN)	PSNR 22.93, SSIM 0.744	PSNR 29.29, SSIM 0.812	PSNR 27.83, SSIM 0.801	PSNR 26.73, SSIM 0.773
Ours (KPN)	PSNR 23.07, SSIM 0.757	PSNR 29.32, SSIM 0.805	PSNR 28.58, SSIM 0.824	PSNR 27.28, SSIM 0.799

Gain level 8 (Table 1 column 4)

Truth	PSNR 0.0, SSIM 1.0	PSNR 0.0, SSIM 1.0	PSNR 0.0, SSIM 1.0	PSNR 0.0, SSIM 1.0
Ref. frame	PSNR 11.3, SSIM 0.196	PSNR 15.36, SSIM 0.164	PSNR 13.74, SSIM 0.226	PSNR 13.89, SSIM 0.292
Average	PSNR 12.89, SSIM 0.202	PSNR 15.97, SSIM 0.153	PSNR 18.74, SSIM 0.349	PSNR 17.84, SSIM 0.362
HDR+	PSNR 13.27, SSIM 0.257	PSNR 18.43, SSIM 0.228	PSNR 17.9, SSIM 0.353	PSNR 18.29, SSIM 0.409
NLM	PSNR 15.84, SSIM 0.305	PSNR 21.94, SSIM 0.358	PSNR 22.2, SSIM 0.473	PSNR 22.53, SSIM 0.547
VBM4D	PSNR 18.45, SSIM 0.433	PSNR 24.77, SSIM 0.613	PSNR 23.47, SSIM 0.567	PSNR 23.96, SSIM 0.624
Ours (DRN)	PSNR 20.42, SSIM 0.534	PSNR 26.53, SSIM 0.736	PSNR 25.44, SSIM 0.691	PSNR 24.56, SSIM 0.674
Ours (KPN)	PSNR 20.16, SSIM 0.55	PSNR 25.68, SSIM 0.689	PSNR 25.66, SSIM 0.7	PSNR 24.88, SSIM 0.691