Ostagram.me what can it do ?

I just discovered this webapp called Ostagram.me . It can take an original photo and a filter photo and produce an artistic output..

This is a selfie photo i had that was filtered using a green image of moss... hence such a result...

I will merge this selfie image with another filter that is more like a drawing...

want to guess the output this time??

How does such application do stuff like that? Its all about algorithms and in this case, AI-type algorithms that to modify original images using deep learning... pretty clever.

The mathematics involve is very slick !