I'm no expert ,but the problem could be how the photo was scanned.
On my scanner there is a preview that allows you to see the photo, then there is a crop option that allows you to to scan just the photo and not the whole scanner table, which would be the white background in your post.
On my scanner there is a preview that allows you to see the photo, then there is a crop option that allows you to to scan just the photo and not the whole scanner table, which would be the white background in your post.