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Machine Brief|

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  3. /Feature Extraction
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Feature Extraction

The process of identifying and pulling out the most important characteristics from raw data.

Definition

The process of identifying and pulling out the most important characteristics from raw data. In classic ML, engineers did this manually. Deep learning models learn to extract features automatically — early layers might detect edges in images, while deeper layers recognize faces or objects.

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Related Terms

Representation Learning

The idea that useful AI comes from learning good internal representations of data.

Embedding

A dense numerical representation of data (words, images, etc.

Deep Learning

A subset of machine learning that uses neural networks with many layers (hence 'deep') to learn complex patterns from large amounts of data.

Activation Function

A mathematical function applied to a neuron's output that introduces non-linearity into the network.

Adam Optimizer

An optimization algorithm that combines the best parts of two other methods — AdaGrad and RMSProp.

AGI

Artificial General Intelligence.

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