Understanding deep learning

- [Instructor] In this next section of movies,…we're gonna take a look at a special type…of machine learning, and this is called deep learning.…It's also called neural networks.…In traditional machine learning,…either humans or some sort of script process…will label the data prior to classification.…And we've seen this over and over in our image classifiers.…In deep learning, the feature extraction…is performed by the algorithm.…The reason this is so significant…is because when this is applied in layers…it can have some substantially improved results…over traditional machine learning.…

What it looks like conceptually is a series of layers,…and what we're seeing here on the left side…is a group of human faces, and you can see…that in the initial set of layers,…patterns of local contrast are detected by the algorithm.…In subsequent layers, face features are detected,…and in still subsequent layers, actual faces are detected.…So what this means in terms of analysis…for, in this case, images, but really for all…types of input data, is the ability…