THIS is the answer about Dropbox that everyone is looking for.
Instead of dropbox.com/sdgfdgdlfhg/gfdghdfh/hfdfgdh (whatever you get there), just replace the dropbox.com part with dl.dropboxusercontent.com
The one with dropbox.com opens a dropbox page from which you can do other things. dl.dropboxusercontent.com opens JUST the image
it seems you need to use: