The MNIST dataset is one of the most popular datasets in the field of computer vision. It is a fairly large dataset, consisting of 60,000 training images and 10,000 test images.
We can see a sample of it in the following screenshot:
Fig 6.16: The MNIST dataset
You can find out more about the MNIST dataset at http://yann.lecun.com/exdb/mnist/ and https://en.wikipedia.org/wiki/MNIST_databas.
Now, we will learn about the problem statement and implement a CNN using Keras.