I did try gathering images from Wikipedia via the WikipediaData function, deleting any that weren't 3-channel images to eliminate black-and-white photos and 4-channel icons, and extracting features (FeatureExtraction) to abstract an artist's "style". Then I compared each artist's style with the restyled image in question using FeatureDistance. This did produce a set of metrics that I had hoped would point to the restyled image's artist. The numbers did not identify the artist though. They were not even close enough to lead me to believe that further effort would produce better results.

I'll leave this challenge for someone else in the Community to attempt. : )

Arno, you got two more.

Interesting puzzle! If the top left is #1 and bottom right is #12 then going from left to right then top to bottom, I’m going to guess 2 is Hokusai, 4 is Chagall, 7 is Van Gogh, 8 is Mondrian, and 10 is Lichtenstein. 12 is probably Picasso but I’m less sure about that one, Beyond that I got nothing.

Alright, #3: Renoir...? Or if not, my other guess is George Seurat. It looks borderline pointillism. Are you going to tell us how you did it? Was it manual or programmed?

Marcel Duchamp for #5 (I had added that to a prior response but after you had already seen it).

Okay, so I think I have #5 finally. As #3 is American, I see some likeness to a few works of Childe Hassam, but that's a stretch. I remain dead in the water for #11.

Oops, I missed that Braque was taken. Maybe Juan Gris for #5 then, and Henri Matisse for #3?

Henri Rousseau for #1 and Georges Braque for #5?

Arno, I don't have a coding gem that would solve the puzzle. Now you have got me thinking how one would do that. With a list of artists, one might gather images from WikiData or Wikipedia and use Nearest to get some metrics to determine which is most likely a match for a particular image. I'll have some time later today and give it a shot.

What we're all hoping for, of course, Mark, is that you will afterwards show us how to solve this riddle computationally :-)

Good start, John. You got 5 of them. Here are the correct answers so far: