This Tool for (c) Microsoft(s) all Windows OS, compares these on a pixel basis, but not only that, you can also find rotated, mirrored and negative images, even if the photo has been resized, well suited for rotated smartphone or iPhone photos. Or for the users, who have a lot of photos, pictures and wallpapers, have been repeatedly confronted with the fact that the hard disk contains dozens of identical files (and there are hundreds of similar files).
