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Re:Implementing a Convolutional Neural Network Using Only NumPy by panpanna on Saturday June 01, 2019 @04:41AM (#20068138)
Andrew Ng's coursed learn you to build CNN (and lots more) from scratch using only numpy.

Hope does this compare to that?

Re:Implementing a Convolutional Neural Network Using Only NumPy by rahimnathwani on Saturday June 01, 2019 @05:26AM (#20068304)
Victor's CNN posts cover roughly the same ground as section 1 (of 4) of Andrew's CNN course.

Andrew's explanations in the videos are really well crafted, and cover the 'why' of everything clearly.

Sections 2-4 of Andrew's course cover more advanced CNN architectures, and also more advanced use cases that image classification.