[matthewvincent]

I don't know why but the "professional" label on this really irritates me. I'm curious to know how the images that got graded on their "professional" scale were selected for inclusion in the sample. Surely by a human who judged them to be the best of many? I'd love to see the duds.

[sp332]

They use images with high aesthetic ratings from the AVA dataset (Aesthetic Visual Analysis). Scoring is described in section 5 in the article.