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For questions related to features in the context of machine learning and, in general, AI.

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When is it necessary to manually extract features to feed into the neural network rather tha...

You do not need to extract features manually. NN's can find & extract good features which is a pattern of an image, signal or any kind of data. … When we check layer outputs in a NN, we can see and visualize how NNs extract features. Do neural networks extract features by themselves every time? …
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