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what does it mean to say that CNN has sparse connections? why CNNs are sparsely connected?

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closed as unclear what you're asking by Michael Chernick, kjetil b halvorsen, Peter Flom May 6 '18 at 14:01

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In neural network usage, "dense" connections connect all inputs.

By contrast, a CNN is "sparse" because only the local "patch" of pixels is connected, instead using all pixels as an input.

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