Artificial Intelligence / Unit 9 AI 0537 short lesson, about 20 seconds
Weight Sharing
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The idea
A convolutional layer uses the same template weights at every position — a pattern learned anywhere is recognized everywhere, and the knob count collapses to template-sized.
In practice
The corner cat and the centered cat finally meet the same detectors; the overfitting appetite drops to a feedable size.
Where people slip
Weight sharing made deep seeing learnable at all — the one big trick, not an optimization detail.
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