Cell block noise filter and other effects

[rich2005]

You come up with some interesting questions.

No solution but this might be a starting point. The G'mic blockism filter

http://i.imgur.com/xdHuQxW.jpg

And steps leading to that, noise -> posterise -> gmic

http://i.imgur.com/6gmfoez.jpg

Hopefully, someone will come up with more suggestions.