Because these strings are generated by Flickr's servers for original-sized uploads ("_o"), the specific "piece" can vary depending on the photographer's upload. However, it is most widely recognized as:
The filename is typically associated with images hosted on Flickr . Based on common image indexing for that specific alphanumeric string, it most often refers to a piece of modern digital or abstract art , frequently used in online galleries or wallpaper collections . FG78XHPJ_o.jpg
: Often a macro photograph or a high-contrast digital abstract. Because these strings are generated by Flickr's servers
: A contributor on Flickr (though the specific user may change if the image has been re-hosted). FG78XHPJ_o.jpg