Book Image

Deep Learning with R for Beginners

By : Mark Hodnett, Joshua F. Wiley, Yuxi (Hayden) Liu, Pablo Maldonado
Book Image

Deep Learning with R for Beginners

By: Mark Hodnett, Joshua F. Wiley, Yuxi (Hayden) Liu, Pablo Maldonado

Overview of this book

Deep learning has a range of practical applications in several domains, while R is the preferred language for designing and deploying deep learning models. This Learning Path introduces you to the basics of deep learning and even teaches you to build a neural network model from scratch. As you make your way through the chapters, you’ll explore deep learning libraries and understand how to create deep learning models for a variety of challenges, right from anomaly detection to recommendation systems. The Learning Path will then help you cover advanced topics, such as generative adversarial networks (GANs), transfer learning, and large-scale deep learning in the cloud, in addition to model optimization, overfitting, and data augmentation. Through real-world projects, you’ll also get up to speed with training convolutional neural networks (CNNs), recurrent neural networks (RNNs), and long short-term memory networks (LSTMs) in R. By the end of this Learning Path, you’ll be well-versed with deep learning and have the skills you need to implement a number of deep learning concepts in your research work or projects.
Table of Contents (23 chapters)
Title Page
Copyright and Credits
About Packt
Contributors
Preface
Index

Convolutional layers


This section shows how convolutional layers work in greater depth. At a basic level, convolutional layers are nothing more than a set of filters. When you look at images while wearing glasses with a red tint, everything appears to have a red hue. Now, imagine if these glasses consisted of different tints embedded within them, maybe a red tint with one or more horizontal green tints. If you had such a pair of glasses, the effect would be to highlight certain aspects of the scene in front of you. Any part of the scene that had a green horizontal line would become more focused.

Convolutional layers apply a selection of patches (or convolutions) over the previous layer’s output. For example, for a face recognition task, the first layer’s patches identify basic features in the image, for example, an edge or a diagonal line. The patches are moved across the image to match different parts of the image. Here is an example of a 3 x 3 convolutional block applied across a 6 x 6...