Imagine a relay race where each runner passes a baton to the next, and that is exactly how a Multi Layer Neural Network works. It takes raw information, like a photo of a cat, and passes it through several stages to understand what it sees.
The Layer Cake Analogy
Think of the network like a tall cake with 27 layers. The bottom layer looks at simple things, like lines or edges. The next layer combines those lines into shapes, and the top layers recognize the whole object. Each layer is like a team of helpers who only pass on the most important clues. If you show it a picture, the first helpers spot straight lines. The next helpers group those lines into curves. By the time the information reaches the top, the network knows it is looking at a cat, not a dog or a cup.
How It Learns
These networks do not know everything at first. They practice by looking at thousands of pictures. When they guess wrong, the system gives them a small nudge to try harder next time. This practice is called training. The 27 number just means there are 27 teams of helpers working together. More layers mean the network can spot very detailed patterns, like the difference between a tabby cat and a Persian cat. It is like building a tower block by block. Each block adds a bit more understanding, until the whole tower sees the big picture.
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