Present Perfect

I have a few images on my disk which I used for a talk and got off of Flickr. For some of them I can't find them again on Flickr. Is there any way I can easily find the original links for these images ? Does Flickr have some sort of upload-and-recognize feature (which would be *awesome*) ? Or is there some other way, given the file I have ?

I have a few images on my disk which I used for a talk and got off of Flickr. For some of them I can't find them again on Flickr....