Plagiarism in photography

There is a bit of a fuss going on at Conscientious and PDN over photographs that look very similar. I am less interested in debating how similar two images are and whether we can consider there to be plagiarism (although if you have a few hundred hours to waste, I imagine that you could devote them all to trawling the internet comparing images by fine art photographers and finding striking similarities), but there are some very interesting questions surrounding this issue in the context of photographic 'art' and hopefully I will manage to turn my thoughts on the subject into a post soon. In the meantime, here is my latest random online discovery of two images that look pretty similar.

Hideaki Uchiyama, Japan Underground II

Andreas Gursky, Kamiokande, 2007