Lets say for example, i want a none class in MNIST.
classes: 0,1,2,3,4,5,6,7,8,9,None.
How do i choose/make data for such a class(None)? Not programatically , but what kind of data should i make so that classifier can differentiate between (0-9) and None.
Not only MNIST, CIFAR10,…etc.