We random select 5 pairs of images from TID2013 for results calibration. Images are stored under ./dist_dir and ./ref_dir. Results of different metrics are saved under ./results_compare/. We also record the problems encountered during our reproduction of matlab scripts in MatlabReproduceNote
| Method | I03.bmp | I04.bmp | I06.bmp | I08.bmp | I19.bmp | Speed (/image) |
|---|---|---|---|---|---|---|
| CKDN1(org) | 0.2833 | 0.5766 | 0.6367 | 0.6579 | 0.5999 | |
| CKDN(ours imported) | 0.2833 | 0.5766 | 0.6367 | 0.6579 | 0.5999 | |
| LPIPS(org) | 0.7237 | 0.2572 | 0.0508 | 0.0521 | 0.4253 | |
| LPIPS(ours imported) | 0.7237 | 0.2572 | 0.0508 | 0.0521 | 0.4253 | |
| DISTS(org) | 0.4742 | 0.1424 | 0.0682 | 0.0287 | 0.3123 | |
| DISTS(ours imported) | 0.4742 | 0.1424 | 0.0682 | 0.0287 | 0.3123 | |
| SSIM2(org) | 0.6993 | 0.9978 | 0.9989 | 0.9669 | 0.6519 | |
| SSIM(ours imported) | 0.6997 | 0.9978 | 0.9989 | 0.9671 | 0.6521 | |
| MS-SSIM3(org) | 0.6733 | 0.9996 | 0.9998 | 0.9566 | 0.8462 | |
| MS-SSIM(ours imported) | 0.6698 | 0.9993 | 0.9996 | 0.9567 | 0.8418 | |
| CW-SSIM9(org) | 0.2763 | 0.9996 | 1.0000 | 0.9068 | 0.8658 | |
| CW-SSIM(ours imported) | 0.2782 | 0.9995 | 1.0000 | 0.9065 | 0.8646 | |
| PSNR4(org) | 21.11 | 20.99 | 27.01 | 23.30 | 21.62 | |
| PSNR(ours imported) | 21.11 | 20.99 | 27.01 | 23.30 | 21.62 | |
| FSIM(org) | 0.6890 | 0.9702 | 0.9927 | 0.9575 | 0.8220 | |
| FSIM(ours imported) | 0.6891 | 0.9702 | 0.9927 | 0.9575 | 0.8220 | |
| VIF5(org) | 0.0172 | 0.9891 | 0.9924 | 0.9103 | 0.1745 | |
| VIF(ours imported) | 0.0172 | 0.9891 | 0.9924 | 0.9103 | 0.1745 | |
| GMSD6(org) | 0.2203 | 0.0005 | 0.0004 | 0.1346 | 0.2050 | |
| GMSD(ours imported) | 0.2203 | 0.0005 | 0.0004 | 0.1346 | 0.2050 | |
| NLPD7(org) | 0.5616 | 0.0195 | 0.0159 | 0.3028 | 0.4326 | |
| NLPD(ours imported) | 0.5616 | 0.0139 | 0.0110 | 0.3033 | 0.4335 | |
| VSI8(opt) | 0.9139 | 0.9620 | 0.9922 | 0.9571 | 0.9262 | |
| VSI(ours imported) | 0.9244 | 0.9497 | 0.9877 | 0.9541 | 0.9348 | |
| MAD10(ours imported) | 195.2796 | 80.8379 | 30.3918 | 84.3542 | 202.2371 | |
| NIQE11(org) | 15.7536 | 3.6549 | 3.2355 | 3.1840 | 8.6352 | |
| NIQE(ours imported) | 15.6530 | 3.6541 | 3.2343 | 3.2076 | 9.1060 | |
| ILNIQE(org) | 113.4801 | 23.9968 | 19.9750 | 22.4493 | 56.6721 | 10s |
| ILNIQE(ours imported) | 115.6144 | 24.0634 | 19.7497 | 22.3253 | 54.7657 | 1s |
| BRISQUE12(org) | 94.6421 | -0.1076 | 0.9929 | 5.3583 | 72.2617 | |
| BRISQUE(ours imported) | 94.6448 | -0.1103 | 1.0772 | 5.1418 | 66.8405 | |
| MUSIQ/AVA(org) | 3.398 | 5.648 | 4.635 | 5.186 | 4.128 | |
| MUSIQ/AVA(ours imported)(org)13 | 3.408 | 5.693 | 4.696 | 5.196 | 4.195 | |
| MUSIQ/koniq10k(org) | 12.494 | 75.332 | 73.429 | 75.188 | 36.938 | |
| MUSIQ/koniq10k(ours imported) | 12.477 | 75.776 | 73.745 | 75.460 | 38.02 | |
| MUSIQ/paq2piq(org) | 46.035 | 72.660 | 73.625 | 74.361 | 69.006 | |
| MUSIQ/paq2piq(ours imported) | 46.018 | 72.665 | 73.765 | 74.387 | 69.721 | |
| MUSIQ/spaq(org) | 17.685 | 70.492 | 78.740 | 79.015 | 49.105 | |
| MUSIQ/spaq(ours imported) | 17.680 | 70.653 | 79.036 | 79.318 | 50.452 | |
| NRQM | 1.3894 | 8.9394 | 8.9735 | 6.8290 | 6.3120 | 10s |
| NRQM (ours imported) | 1.3931 | 8.9418 | 8.9721 | 6.8309 | 6.3031 | 5s |
| PI14 | 11.9235 | 3.0720 | 2.6180 | 2.8074 | 6.7713 | |
| PI (ours imported ) | 11.9286 | 3.0730 | 2.6356 | 2.7979 | 6.9545 | |
| Paq2piq | 44.1340 | 73.6015 | 74.3297 | 76.8748 | 70.9153 | |
| Paq2piq (ours imported) | 44.1340 | 73.6015 | 74.3297 | 76.8748 | 70.9153 | |
| PieAPP | 4.2976 | 3.9088 | 2.2620 | 1.4274 | 3.4188 | |
| PieAPP (ours imported) | 4.2976 | 3.9088 | 2.2620 | 1.4274 | 3.4188 | |
| FID15 | 225.3678 (legacy_pytorch) | 220.5819 (clean) | ||||
| FID (ours imported) | 225.3679 (legacy_pytorch) | 220.5819 (clean) | ||||
| InceptionScore 16 | 2.8300 (splits=1) | |||||
| InceptionScore (ours imported) | 2.8303 (splits=1) |
[1] CKDN used degraded images as references in the original paper.
[2] The original SSIM matlab script downsample the image when larger than 256. We remove such constraint. We use rgb2gray function as input of original SSIM matlab script
[3] We use rgb2gray function as input of original MS-SSIM matlab script.
[4] The original PSNR code refers to scikit-learn package with RGB 3-channel calculation (from skimage.metrics import peak_signal_noise_ratio).
[5] We use rgb2gray function as input of original VIF matlab script.
[6] We use rgb2gray function as input of original GMSD matlab script.
[7] We use rgb2gray function as input of original NLPD matlab script, and try to mimic 'imfilter' and 'conv2' functions in matlab.
[8] Since official matlab code is not available, we use the implement of IQA-Optimization for comparation. The differences are described as follows. After modifying the above implementation, the results are basically the same.
- we use interpolation to transform the image to 256*256 and then back to the image size after calculating VSMap in the SDSP function
- rgb2lab's function is slightly different
- the range of ours is -127 to 128 when constructing SDMap, and the value of optimization is -128 to 127
- different down-sampling operations
[9] We use rgb2gray function as input of original CW-SSIM matlab script. The number of level is 4 and orientation is 8.
[10] We use rgb2yiq function as input, and the original MAD matlab script is not available.
[11] We use rgb2gray function as input of original NIQE matlab script.
[12] We use rgb2gray function images as input of original BRISQUE matlab script.
[13] Results have about ±2% difference with tensorflow codes because of some detailed implementation differences between TensorFlow and PyTorch. For example, PyTorch does not support gaussian interpolation, different default epsilon value, etc.
[14] Perceptual Index (PI) use YCBCR color space and crop border with size 4.
[15] We use codes from the clean-fid project.
[15] We use codes from the torch-fidelity project with "fidelity --gpu 0 --samples-find-ext bmp,BMP --isc --isc-splits 1 --input1 ResultsCalibra/dist_dir/".