Pixelated

I saw this painting a while ago on Pinterest, and I really love it:

Unfortunately, I don’t know who the artist is. The image on Pinterest links to a post on tumblr, which I can only trace back to this other tumblr post. Do you have any idea how to find out who painted this?

I’m considering (someday) doing something similar, with another famous and easily recognizable painting. Maybe Starry Night? What would you do?