How to find the original Flickr Photo URL and User from a Static Flickr Image URL/Permalink (My priceless Flickr Tip)
Got a link like http://farm3.static.flickr.com/2065/5720492675_c43bb0ae35.jpg and want to find out which user posted it, more images by that user, see the full-size version, etc? Seek no longer, the answer is very simple!
The image we found
From the URL you’ve got take extract the image name (5720492675_c43bb0ae35.jpg) and split it on the underscore. The first part is the photoID, the second part is the hash/salt and (if there) the third part the size (Full format: photoId_hash_size.jpg).
Now append that photoId to http://flickr.com/photo.gne?id=5720492675_c43bb0ae35.jpg and *MAGIC* there you have it, the Original Flickr Photo URL (and the user) 🙂 The example above would be transformed to http://flickr.com/photo.gne?id=5720492675