The Girl With a Pearl Earring is considered as one of Johannes Vermeer's masterpiece and as a major painting of the 17th century.

And that makes sense: ultimately, art is about our emotional reaction to a Starry Night or a Girl With a Pearl Earring. But to a computer it's all just brushstrokes.

Unravelling the mysteries of Vermeer's Girl With a Pearl Earring is still, a hundred and twenty seven years after the painting was randomly discovered, the goal of many experts.