| Match? |
Picture 1 |
Picture 2 |
Comments |
| Yes |
 |
 |
Different pictures with reasonably similar areas of brightness. Actually I was surprised that this one worked - it needed a threshold of 30% |
| Yes |
 |
 |
Different pictures with similar areas of brightness. This would work even if one picture had a different person in the same place wearing similar clothes. |
| Yes |
 |
 |
The same picture with different quality and overall brightness but it's ok because it's the same original picture. This kind of thing is what the function is really good at. |
| No |
 |
 |
The same picture but one is shifted in the frame so the areas of brightness don't match. |
| No |
 |
 |
No chance. It may be the same bird but they're different pictures with different areas of brightness. |