To find a decent sized collection of stock photos that are in the public domain or have expired copyrights.
EveryStockPhoto Search Engine
- Nice interface, giant collection of public domain stock photos
Public Domain Photos .com
- well organized collection of public domain photos.
Wikipedia Public Domain Photos
- contains a wide collection of public domain photos.
National Fish & Wildlife Service
- contains lots of nature photos
- space photos from NASA
- aggregation of photos from many government public domain photos
I build computer vision software at Flickr
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