Here's a list of various image interpolation techniques, with similar goal:

- http://www.wisdom.weizmann.ac.il/~vision/SingleImageSR.html

- http://chiranjivi.tripod.com/EDITut.html

- http://www.tecnick.com/pagefiles/appunti/iNEDI_tesi_Nicola_A...

- http://www.eurasip.org/Proceedings/Eusipco/Eusipco2009/conte...

- http://bengal.missouri.edu/~kes25c/

http://bengal.missouri.edu/~kes25c/nnedi3.zip

http://forum.doom9.org/showthread.php?t=147695

- http://arxiv.org/pdf/1501.00092v2.pdf

http://waifu2x.udp.jp/

https://github.com/nagadomi/waifu2x

http://waifu2x-avisynth.sunnyone.org/

https://github.com/sunnyone/Waifu2xAvisynth

- http://i-programmer.info/news/192-photography-a-imaging/1010...

https://github.com/david-gpu/srez

- http://arxiv.org/pdf/1609.04802v1.pdf