Drilling Down into Machine Learning and Deep Learning

Deep learning in turn, is subclass of machine learning that creates machines that use methods originally inspired by how a cat's brain reacted with light signals and then generalized to mimic the human brain's ability to learn. Until recently, we simply didn't have enough data and proces- sing power to train a machine to learn. Deep neural networks (DNNs) learn at many levels of abstraction, ranging from simple concepts to complex ones. This is what designates the "deep" in deep learning. Each layer in the neural network categorizes some kind of information, refines it, and passes it along to the next layer.