large collection of photos for IR software testing

I'm looking for large (preferably 50K+) collection of photos that I could use for testing image recognition sof开发者_Python百科tware. So preferably photos of objects. I'm fine with album covers, movie posters or anything like that. Any suggestions?

The ImageNet database (http://www.image-net.org/ - seems to be down at the time I'm writing this, but i think that's temporary) is something you could look into, if it comes back up. It has literally millions of labeled images, seperated into a hierarchy of classes (you don't have to download the complete set).

What about a google search like this?

Another google search let me find this one. Lots of objects there.