ref. image, distorted image A, distorted image B, preference for A ref_168.png,ref_168.png,distort_168_deblurDenoiseChan_motion_gaussian_1.png,0.6 ref_168.png,ref_168.png,distort_168_superResSRCNN_1.png,1 ref_168.png,ref_168.png,distort_168_deblurDenoiseChan_motion_gaussian_2.png,0.923 ref_168.png,ref_168.png,distort_168_speckleNoise_1.png,0.875 ref_168.png,ref_168.png,distort_168_waveTransform_1.png,0.667 ref_168.png,ref_168.png,distort_168_polyTransform_1.png,0.825 ref_168.png,ref_168.png,distort_168_globalImShiftRotateRadial_1.png,0.85 ref_168.png,ref_168.png,distort_168_poissonNoise_1.png,0.9 ref_168.png,ref_168.png,distort_168_gaussianNoiseAdditive_1.png,1 ref_168.png,ref_168.png,distort_168_swirlTransform_1.png,0.825 ref_168.png,ref_168.png,distort_168_spatiallyVaryingNoise_denoiser_1.png,1 ref_168.png,ref_168.png,distort_168_deblurTikanov_gaussian_1.png,0.615 ref_168.png,ref_168.png,distort_168_changeColorTemp_1.png,0.95 ref_168.png,ref_168.png,distort_168_compressiveSensing_DanielYan_1.png,0.6 ref_168.png,ref_168.png,distort_168_swirlTransform_2.png,0.744 ref_168.png,distort_168_deblurDenoiseChan_motion_gaussian_1.png,distort_168_superResSRCNN_1.png,0.974 ref_168.png,distort_168_deblurDenoiseChan_motion_gaussian_1.png,distort_168_deblurDenoiseChan_motion_gaussian_2.png,0.825 ref_168.png,distort_168_deblurDenoiseChan_motion_gaussian_1.png,distort_168_speckleNoise_1.png,0.75 ref_168.png,distort_168_deblurDenoiseChan_motion_gaussian_1.png,distort_168_waveTransform_1.png,0.55 ref_168.png,distort_168_deblurDenoiseChan_motion_gaussian_1.png,distort_168_polyTransform_1.png,0.65 ref_168.png,distort_168_deblurDenoiseChan_motion_gaussian_1.png,distort_168_globalImShiftRotateRadial_1.png,0.775 ref_168.png,distort_168_deblurDenoiseChan_motion_gaussian_1.png,distort_168_poissonNoise_1.png,0.825 ref_168.png,distort_168_deblurDenoiseChan_motion_gaussian_1.png,distort_168_gaussianNoiseAdditive_1.png,1 ref_168.png,distort_168_deblurDenoiseChan_motion_gaussian_1.png,distort_168_swirlTransform_1.png,0.4 ref_168.png,distort_168_deblurDenoiseChan_motion_gaussian_1.png,distort_168_spatiallyVaryingNoise_denoiser_1.png,0.95 ref_168.png,distort_168_deblurDenoiseChan_motion_gaussian_1.png,distort_168_deblurTikanov_gaussian_1.png,0.425 ref_168.png,distort_168_deblurDenoiseChan_motion_gaussian_1.png,distort_168_changeColorTemp_1.png,0.925 ref_168.png,distort_168_deblurDenoiseChan_motion_gaussian_1.png,distort_168_compressiveSensing_DanielYan_1.png,0.436 ref_168.png,distort_168_deblurDenoiseChan_motion_gaussian_1.png,distort_168_swirlTransform_2.png,0.579 ref_168.png,distort_168_superResSRCNN_1.png,distort_168_deblurDenoiseChan_motion_gaussian_2.png,0.05 ref_168.png,distort_168_superResSRCNN_1.png,distort_168_speckleNoise_1.png,0.025 ref_168.png,distort_168_superResSRCNN_1.png,distort_168_waveTransform_1.png,0.025 ref_168.png,distort_168_superResSRCNN_1.png,distort_168_polyTransform_1.png,0.125 ref_168.png,distort_168_superResSRCNN_1.png,distort_168_globalImShiftRotateRadial_1.png,0.175 ref_168.png,distort_168_superResSRCNN_1.png,distort_168_poissonNoise_1.png,0.051 ref_168.png,distort_168_superResSRCNN_1.png,distort_168_gaussianNoiseAdditive_1.png,0.487 ref_168.png,distort_168_superResSRCNN_1.png,distort_168_swirlTransform_1.png,0.1 ref_168.png,distort_168_superResSRCNN_1.png,distort_168_spatiallyVaryingNoise_denoiser_1.png,0.075 ref_168.png,distort_168_superResSRCNN_1.png,distort_168_deblurTikanov_gaussian_1.png,0 ref_168.png,distort_168_superResSRCNN_1.png,distort_168_changeColorTemp_1.png,0.225 ref_168.png,distort_168_superResSRCNN_1.png,distort_168_compressiveSensing_DanielYan_1.png,0.05 ref_168.png,distort_168_superResSRCNN_1.png,distort_168_swirlTransform_2.png,0.15 ref_168.png,distort_168_deblurDenoiseChan_motion_gaussian_2.png,distort_168_speckleNoise_1.png,0.325 ref_168.png,distort_168_deblurDenoiseChan_motion_gaussian_2.png,distort_168_waveTransform_1.png,0.308 ref_168.png,distort_168_deblurDenoiseChan_motion_gaussian_2.png,distort_168_polyTransform_1.png,0.275 ref_168.png,distort_168_deblurDenoiseChan_motion_gaussian_2.png,distort_168_globalImShiftRotateRadial_1.png,0.436 ref_168.png,distort_168_deblurDenoiseChan_motion_gaussian_2.png,distort_168_poissonNoise_1.png,0.4 ref_168.png,distort_168_deblurDenoiseChan_motion_gaussian_2.png,distort_168_gaussianNoiseAdditive_1.png,0.975 ref_168.png,distort_168_deblurDenoiseChan_motion_gaussian_2.png,distort_168_swirlTransform_1.png,0.3 ref_168.png,distort_168_deblurDenoiseChan_motion_gaussian_2.png,distort_168_spatiallyVaryingNoise_denoiser_1.png,0.65 ref_168.png,distort_168_deblurDenoiseChan_motion_gaussian_2.png,distort_168_deblurTikanov_gaussian_1.png,0.125 ref_168.png,distort_168_deblurDenoiseChan_motion_gaussian_2.png,distort_168_changeColorTemp_1.png,0.55 ref_168.png,distort_168_deblurDenoiseChan_motion_gaussian_2.png,distort_168_compressiveSensing_DanielYan_1.png,0.075 ref_168.png,distort_168_deblurDenoiseChan_motion_gaussian_2.png,distort_168_swirlTransform_2.png,0.256 ref_168.png,distort_168_speckleNoise_1.png,distort_168_waveTransform_1.png,0.4 ref_168.png,distort_168_speckleNoise_1.png,distort_168_polyTransform_1.png,0.342 ref_168.png,distort_168_speckleNoise_1.png,distort_168_globalImShiftRotateRadial_1.png,0.425 ref_168.png,distort_168_speckleNoise_1.png,distort_168_poissonNoise_1.png,0.513 ref_168.png,distort_168_speckleNoise_1.png,distort_168_gaussianNoiseAdditive_1.png,0.925 ref_168.png,distort_168_speckleNoise_1.png,distort_168_swirlTransform_1.png,0.35 ref_168.png,distort_168_speckleNoise_1.png,distort_168_spatiallyVaryingNoise_denoiser_1.png,0.821 ref_168.png,distort_168_speckleNoise_1.png,distort_168_deblurTikanov_gaussian_1.png,0.25 ref_168.png,distort_168_speckleNoise_1.png,distort_168_changeColorTemp_1.png,0.675 ref_168.png,distort_168_speckleNoise_1.png,distort_168_compressiveSensing_DanielYan_1.png,0.325 ref_168.png,distort_168_speckleNoise_1.png,distort_168_swirlTransform_2.png,0.462 ref_168.png,distort_168_waveTransform_1.png,distort_168_polyTransform_1.png,0.45 ref_168.png,distort_168_waveTransform_1.png,distort_168_globalImShiftRotateRadial_1.png,0.615 ref_168.png,distort_168_waveTransform_1.png,distort_168_poissonNoise_1.png,0.7 ref_168.png,distort_168_waveTransform_1.png,distort_168_gaussianNoiseAdditive_1.png,0.95 ref_168.png,distort_168_waveTransform_1.png,distort_168_swirlTransform_1.png,0.6 ref_168.png,distort_168_waveTransform_1.png,distort_168_spatiallyVaryingNoise_denoiser_1.png,0.925 ref_168.png,distort_168_waveTransform_1.png,distort_168_deblurTikanov_gaussian_1.png,0.333 ref_168.png,distort_168_waveTransform_1.png,distort_168_changeColorTemp_1.png,0.85 ref_168.png,distort_168_waveTransform_1.png,distort_168_compressiveSensing_DanielYan_1.png,0.4 ref_168.png,distort_168_waveTransform_1.png,distort_168_swirlTransform_2.png,0.375 ref_168.png,distort_168_polyTransform_1.png,distort_168_globalImShiftRotateRadial_1.png,0.658 ref_168.png,distort_168_polyTransform_1.png,distort_168_poissonNoise_1.png,0.775 ref_168.png,distort_168_polyTransform_1.png,distort_168_gaussianNoiseAdditive_1.png,0.95 ref_168.png,distort_168_polyTransform_1.png,distort_168_swirlTransform_1.png,0.6 ref_168.png,distort_168_polyTransform_1.png,distort_168_spatiallyVaryingNoise_denoiser_1.png,0.795 ref_168.png,distort_168_polyTransform_1.png,distort_168_deblurTikanov_gaussian_1.png,0.35 ref_168.png,distort_168_polyTransform_1.png,distort_168_changeColorTemp_1.png,0.8 ref_168.png,distort_168_polyTransform_1.png,distort_168_compressiveSensing_DanielYan_1.png,0.325 ref_168.png,distort_168_polyTransform_1.png,distort_168_swirlTransform_2.png,0.45 ref_168.png,distort_168_globalImShiftRotateRadial_1.png,distort_168_poissonNoise_1.png,0.425 ref_168.png,distort_168_globalImShiftRotateRadial_1.png,distort_168_gaussianNoiseAdditive_1.png,0.95 ref_168.png,distort_168_globalImShiftRotateRadial_1.png,distort_168_swirlTransform_1.png,0.4 ref_168.png,distort_168_globalImShiftRotateRadial_1.png,distort_168_spatiallyVaryingNoise_denoiser_1.png,0.816 ref_168.png,distort_168_globalImShiftRotateRadial_1.png,distort_168_deblurTikanov_gaussian_1.png,0.231 ref_168.png,distort_168_globalImShiftRotateRadial_1.png,distort_168_changeColorTemp_1.png,0.675 ref_168.png,distort_168_globalImShiftRotateRadial_1.png,distort_168_compressiveSensing_DanielYan_1.png,0.2 ref_168.png,distort_168_globalImShiftRotateRadial_1.png,distort_168_swirlTransform_2.png,0.385 ref_168.png,distort_168_poissonNoise_1.png,distort_168_gaussianNoiseAdditive_1.png,0.975 ref_168.png,distort_168_poissonNoise_1.png,distort_168_swirlTransform_1.png,0.425 ref_168.png,distort_168_poissonNoise_1.png,distort_168_spatiallyVaryingNoise_denoiser_1.png,0.825 ref_168.png,distort_168_poissonNoise_1.png,distort_168_deblurTikanov_gaussian_1.png,0.15 ref_168.png,distort_168_poissonNoise_1.png,distort_168_changeColorTemp_1.png,0.65 ref_168.png,distort_168_poissonNoise_1.png,distort_168_compressiveSensing_DanielYan_1.png,0.125 ref_168.png,distort_168_poissonNoise_1.png,distort_168_swirlTransform_2.png,0.385 ref_168.png,distort_168_gaussianNoiseAdditive_1.png,distort_168_swirlTransform_1.png,0.1 ref_168.png,distort_168_gaussianNoiseAdditive_1.png,distort_168_spatiallyVaryingNoise_denoiser_1.png,0.079 ref_168.png,distort_168_gaussianNoiseAdditive_1.png,distort_168_deblurTikanov_gaussian_1.png,0 ref_168.png,distort_168_gaussianNoiseAdditive_1.png,distort_168_changeColorTemp_1.png,0.103 ref_168.png,distort_168_gaussianNoiseAdditive_1.png,distort_168_compressiveSensing_DanielYan_1.png,0.026 ref_168.png,distort_168_gaussianNoiseAdditive_1.png,distort_168_swirlTransform_2.png,0.128 ref_168.png,distort_168_swirlTransform_1.png,distort_168_spatiallyVaryingNoise_denoiser_1.png,0.875 ref_168.png,distort_168_swirlTransform_1.png,distort_168_deblurTikanov_gaussian_1.png,0.2 ref_168.png,distort_168_swirlTransform_1.png,distort_168_changeColorTemp_1.png,0.775 ref_168.png,distort_168_swirlTransform_1.png,distort_168_compressiveSensing_DanielYan_1.png,0.41 ref_168.png,distort_168_swirlTransform_1.png,distort_168_swirlTransform_2.png,0.525 ref_168.png,distort_168_spatiallyVaryingNoise_denoiser_1.png,distort_168_deblurTikanov_gaussian_1.png,0.075 ref_168.png,distort_168_spatiallyVaryingNoise_denoiser_1.png,distort_168_changeColorTemp_1.png,0.333 ref_168.png,distort_168_spatiallyVaryingNoise_denoiser_1.png,distort_168_compressiveSensing_DanielYan_1.png,0.15 ref_168.png,distort_168_spatiallyVaryingNoise_denoiser_1.png,distort_168_swirlTransform_2.png,0.2 ref_168.png,distort_168_deblurTikanov_gaussian_1.png,distort_168_changeColorTemp_1.png,0.925 ref_168.png,distort_168_deblurTikanov_gaussian_1.png,distort_168_compressiveSensing_DanielYan_1.png,0.564 ref_168.png,distort_168_deblurTikanov_gaussian_1.png,distort_168_swirlTransform_2.png,0.675 ref_168.png,distort_168_changeColorTemp_1.png,distort_168_compressiveSensing_DanielYan_1.png,0.15 ref_168.png,distort_168_changeColorTemp_1.png,distort_168_swirlTransform_2.png,0.175 ref_168.png,distort_168_compressiveSensing_DanielYan_1.png,distort_168_swirlTransform_2.png,0.725