Super-Resolution Benchmarking Results

2x scaling factor

Set5: butterfly.png size: 256x256
orig_butterfly.jpg
Original
bicubic_butterfly.jpg
Bicubic interpolation
nearest_butterfly.jpg
Nearest neighbor interpolation
lanczos_butterfly.jpg
Lanczos interpolation
PSRN / SSIM / Speed (CPU)26.6645 / 0.9048 / 0.000201 23.6854 / 0.8698 / 0.000075 26.9476 / 0.9075 / 0.001039
espcn_butterfly.jpg
ESPCN
fsrcnn_butterfly.jpg
FSRCNN
lapsrn_butterfly.jpg
LapSRN
edsr_butterfly.jpg
EDSR
29.0341 / 0.9354 / 0.00415729.0077 / 0.9345 / 0.006325 27.8212 / 0.9230 / 0.037937 30.0347 / 0.9453 / 2.077280

3x scaling factor

Urban100: img_001.png size: 1024x644
orig_urban.jpg
Original
bicubic_urban.jpg
Bicubic interpolation
nearest_urban.jpg
Nearest neighbor interpolation
lanczos_urban.jpg
Lanczos interpolation
PSRN / SSIM / Speed (CPU)27.0474 / 0.8484 / 0.000391 26.0842 / 0.8353 / 0.000236 27.0704 / 0.8483 / 0.002234
espcn_urban.jpg
ESPCN
fsrcnn_urban.jpg
FSRCNN
LapSRN is not trained for 3x
because of its architecture
edsr_urban.jpg
EDSR
28.0118 / 0.8588 / 0.03074828.0184 / 0.8597 / 0.094173 30.5671 / 0.9019 / 9.517580

4x scaling factor

Set14: comic.png size: 250x361
orig_comic.jpg
Original
bicubic_comic.jpg
Bicubic interpolation
nearest_comic.jpg
Nearest neighbor interpolation
lanczos_comic.jpg
Lanczos interpolation
PSRN / SSIM / Speed (CPU)19.6766 / 0.6413 / 0.000262 18.5106 / 0.5879 / 0.000085 19.4948 / 0.6317 / 0.001098
espcn_comic.jpg
ESPCN
fsrcnn_comic.jpg
FSRCNN
lapsrn_comic.jpg
LapSRN
edsr_comic.jpg
EDSR
20.0417 / 0.6302 / 0.00189420.0885 / 0.6384 / 0.002103 20.0676 / 0.6339 / 0.061640 20.5233 / 0.6901 / 0.665876

8x scaling factor

Div2K: 0006.png size: 1356x2040
orig_div2k.jpg
Original
bicubic_div2k.jpg
Bicubic interpolation
nearest_div2k.jpg
Nearest neighbor interpolation
PSRN / SSIM / Speed (CPU)26.3139 / 0.8033 / 0.00110723.8291 / 0.7340 / 0.000611
lanczos_div2k.jpg
Lanczos interpolation
lapsrn_div2k.jpg
LapSRN
26.1565 / 0.7962 / 0.00478226.7046 / 0.7987 / 2.274290

2x scaling factor

Avg inference time in sec (CPU)Avg PSNR Avg SSIM
ESPCN 0.008795 32.7059 0.9276
EDSR 5.923450 34.1300 0.9447
FSRCNN 0.021741 32.8886 0.9301
LapSRN 0.114812 32.2681 0.9248
Bicubic 0.000208 32.1638 0.9305
Nearest neighbor 0.000114 29.1665 0.9049
Lanczos 0.001094 32.4687 0.9327

3x scaling factor

Avg inference time in sec (CPU)Avg PSNR Avg SSIM
ESPCN 0.005495 28.4229 0.8474
EDSR 2.455510 29.9828 0.8801
FSRCNN 0.008807 28.3068 0.8429
LapSRN 0.282575 26.7330 0.8862
Bicubic 0.000311 26.0635 0.8754
Nearest neighbor 0.000148 23.5628 0.8174
Lanczos 0.001012 25.9115 0.8706

4x scaling factor

Avg inference time in sec (CPU)Avg PSNR Avg SSIM
ESPCN 0.004311 26.6870 0.7891
EDSR 1.607570 28.1552 0.8317
FSRCNN 0.005302 26.6088 0.7863
LapSRN 0.121229 26.7383 0.7896
Bicubic 0.000311 26.0635 0.8754
Nearest neighbor 0.000148 23.5628 0.8174
Lanczos 0.001012 25.9115 0.8706

Reference: https://docs.opencv.org/4.x/dc/d69/tutorial_dnn_superres_benchmark.html