| SSIM Index for Image Quality Assessment Recent countries visiting this post |  |
 | 120 | United States |
 | 51 | |
 | 38 | India |
 | 18 | United Kingdom |
 | 14 | China |
 | 6 | Poland |
 | 5 | Japan |
 | 3 | Germany |
 | 3 | Spain |
 | 3 | Italy |
 | 3 | Korea, Republic of |
 | 2 | Pakistan |
 | 2 | Lithuania |
 | 2 | Russian Federation |
 | 2 | Egypt |
 | 1 | Taiwan |
 | 1 | Greece |
 | 1 | Bangladesh |
 | 1 | Ireland |
 | 1 | United Arab Emirates |
 | 1 | Sweden |
 | 1 | Finland |