Japanese scientists use AI to read minds

Imagine a reality where computers can visualise what you are thinking. In late December, Guohua Shen, Tomoyasu Horikawa, Kei Majima and Yukiyasu Kamitani released the results of their recent research on using artificial intelligence to decode thoughts on the scientific platform, BioRxiv. Machine learning has previously been used to study brain scans (MRIs, or magnetic resonance imaging) and generate visualisations of what a person is thinking when referring to simple, binary images like black and white letters or simple geographic shapes (as shown in Figure 2 here). But the scientists from Kyoto developed new techniques of "decoding" thoughts using deep neural networks (artificial intelligence). The new technique allows the scientists to decode more sophisticated "hierarchical" images, which have multiple layers of colour and structure, like a picture of a bird or a man wearing a cowboy hat, for example.