Book Image

Deep Learning with TensorFlow and Keras – 3rd edition - Third Edition

By : Amita Kapoor, Antonio Gulli, Sujit Pal
5 (2)
Book Image

Deep Learning with TensorFlow and Keras – 3rd edition - Third Edition

5 (2)
By: Amita Kapoor, Antonio Gulli, Sujit Pal

Overview of this book

Deep Learning with TensorFlow and Keras teaches you neural networks and deep learning techniques using TensorFlow (TF) and Keras. You'll learn how to write deep learning applications in the most powerful, popular, and scalable machine learning stack available. TensorFlow 2.x focuses on simplicity and ease of use, with updates like eager execution, intuitive higher-level APIs based on Keras, and flexible model building on any platform. This book uses the latest TF 2.0 features and libraries to present an overview of supervised and unsupervised machine learning models and provides a comprehensive analysis of deep learning and reinforcement learning models using practical examples for the cloud, mobile, and large production environments. This book also shows you how to create neural networks with TensorFlow, runs through popular algorithms (regression, convolutional neural networks (CNNs), transformers, generative adversarial networks (GANs), recurrent neural networks (RNNs), natural language processing (NLP), and graph neural networks (GNNs)), covers working example apps, and then dives into TF in production, TF mobile, and TensorFlow with AutoML.
Table of Contents (23 chapters)
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Index

Variational autoencoders

Like DBNs (Chapter 7, Unsupervised Learning) and GANs (see Chapter 9, Generative Models, for more details), variational autoencoders are also generative models. Variational autoencoders (VAEs) are a mix of the best neural networks and Bayesian inference. They are one of the most interesting neural networks and have emerged as one of the most popular approaches to unsupervised learning. They are autoencoders with a twist. Along with the conventional encoder and decoder network of autoencoders, they have additional stochastic layers. The stochastic layer, after the encoder network, samples the data using a Gaussian distribution, and the one after the decoder network samples the data using Bernoulli’s distribution. Like GANs, VAEs can be used to generate images and figures based on the distribution they have been trained on.

VAEs allow one to set complex priors in the latent space and thus learn powerful latent representations. Figure 8.14 describes...