1. Rainie, L., Brenner, J., Purcell, K.: Photos and videos as social currency online (2012),
http://pewinternet.org/Reports/2012/Online-Pictures.aspx
2. Alexa Top Sites,
http://www.alexa.com/topsites
3. Imgur Site Stats,
http://imgur.com/stats/month
4. Imgur FAQ,
http://imgur.com/faq#quality
5. Shen, M.Y., Kuo, C.C.J.: Review of Postprocessing Techniques for Compression Artifact Removal. J. Vis. Commun. Image Represent. 9, 2–14 (1998)