There’s a famous saying: “penny for your thoughts”.
It’s something you say when you want to know what another person is thinking, usually because they’ve been quiet for a while.
Well, you no longer have to part with your hard-earned cash, as Japanese researchers have developed a “brain decoding technology”.
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The tech, which leverages artificial intelligence (AI), translates human brain activity into mental images.
And now the first ever mental images extracted from a human brain have been shown.
Neural Networks / ScienceDirectNeural Networks / ScienceDirect
The team, consisting of researchers from the National Institutes for Quantum Science and Technology (QST) and Osaka University, have translated human brain activity into mental images of objects and landscapes.
The approach has produced vivid depictions such as a distinct leopard with discernible features like ears, mouth and spots, and objects like an airplane with red-wing lights.
While past research has managed to recreate images people have seen by analyzing their brain activity, making these mental images visible to others is difficult.
Only a few studies have successfully shown mental images, and these images were usually limited to certain categories like human faces, letters, or shapes.
“Therefore, visualizing mental imagery for arbitrary natural images stands as a significant milestone,” the study’s researchers said.
Neural Networks / ScienceDirectNeural Networks / ScienceDirect
So, how did they manage to crack it?
The researchers exposed participants to around 1,200 images and then meticulously analyzed and quantified correlation between their brain signals and the visual stimuli using functional magnetic resonance imaging (fMRI).
The mapping was then used to train a generative AI to decipher and replicate the mental imagery derived from brain activity.
But what are the implications?
According to the researchers, the implications of this “brain decoding” could help in potential applications in medicine and welfare.
Essentially, it could be used to help create new communication devices, while also allowing scientists to explore and understand how hallucinations and dreams work in the brain.
The study was published in the scientific journal, Neural Networks.
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