You often hear people say we’re in the early days of artificial intelligence, probably the most important tech theme of the next century. It’s important to put real measurements on improvements to the technology. Google tried to do just that at a press event in San Francisco this morning. Here are the top lines:

• Image recognition has improved to 93.9% accuracy from 89.6% in 2014. It’s also more detailed; it can detect colors and analyze the content in images with more than one subject.

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