There are a million and one examples and tutorials on how to train up a neural network on the sample sets like the MNIST data and the CIFAR-10 data, but how does one go from the toy examples of recognising 200x200 clips each containing a single centred object to a real problem like finding CIFAR-10 category objects (the dog and the cat below) within a picture, like I presume Google does for their photo annotation.
Can someone describe how one might approach this leap from the classroom to the real world?