![]() ![]() The network eventually settles on a best guess for which letters are contained in the image. This process repeats on between three and eight levels of nodes, with signals passing between as many as 8 million nodes. A third layer fires only if its nodes recognise arrangements of pixels that form whole or partial shapes. The next layer of nodes “fires” only if they detect a particular arrangement of pixels. The network starts with nodes that detect input from the real world, such as whether a specific pixel in an image is black or white. ![]() Their program uses virtual neurons connected in a network modelled on the human brain. ![]() George says the result isn’t as important as the methods, which he and CEO Scott Phoenix hope will lead to more human-like AI. And it does even better against CAPTCHAs from Yahoo, Paypal and. It can pass Google’s reCAPTCHA, regarded as the most difficult, 90 per cent of the time, says Dileep George, co-founder of the firm. Vicarious, a start-up firm in Union City, California, announced this week that it has built an algorithm that can defeat any text-based CAPTCHA – a goal that has long eluded security researchers. ![]()
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