Applying MLP to the MNIST dataset

Let's apply MLP to the MNIST dataset.

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Let us discuss our first deep neural network for handwritten character recognition, using the MNIST\text{MNIST} dataset. This dataset has dominated much of the early DNN\text{DNN} developments and must be considered a classic by now. The data set consists of digitized examples of handwritten numbers from 0 to 9. Each image consists of 28×28 28 \times 28 pixels. An example is shown as input in the figure below. This benchmark dataset has 60,00060,000 training examples and 10,00010,000 test examples. A developer is free to choose any portion of the 60,00060,000 training images as the validation set.

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