How the AI recognizes the symbols?

Good day!

Read a few articles, videos about how artificial intelligence works, the principle of operation of a neural network are more or less clear. But that's how the AI determines for example the symbol(which is the number 6 and that's 6, not 9)?

Please write how it works on fingers or articles that clearly explain the principle of recognition
April 3rd 20 at 18:37
1 answer
April 3rd 20 at 18:39
Read a little, bad looking

https://habr.com/ru/post/143129/

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