# What this book covers

Chapter 1, *Introducing Advanced Deep Learning with Keras*, covers the key concepts of deep learning such as optimization, regularization, loss functions, fundamental layers, and networks and their implementation in Keras. This chapter also serves as a review of both deep learning and Keras using sequential API.

Chapter 2, *Deep Neural Networks*, discusses the functional API of Keras. Two widely-used deep network architectures, ResNet and DenseNet, are examined and implemented in Keras, using functional API.

Chapter 3, *Autoencoders*, covers a common network structure called autoencoder that is used to discover the latent representation of the input data. Two example applications of autoencoders, denoising and colorization, are discussed and implemented in Keras.

Chapter 4, *Generative Adversarial Networks (GANs)*, discusses one of the recent significant advances in deep learning. GAN is used to generate new synthetic data that appear real. This chapter explains the principles of GAN. Two examples of GAN, DCGAN and CGAN, are examined and implemented in Keras.

Chapter 5, *Improved GANs*, covers algorithms that improve the basic GAN. The algorithms address the difficulty in training GANs and improve the perceptual quality of synthetic data. WGAN, LSGAN, and ACGAN are discussed and implemented in Keras.

Chapter 6, *Disentangled Representation GANs*, discusses how to control the attributes of the synthetic data generated by GANs. The attributes can be controlled if the latent representations are disentangled. Two techniques in disentangling representations, InfoGAN and StackedGAN, are covered and implemented in Keras.

Chapter 7, *Cross-Domain GANs*, covers a practical application of GANs, translating images from one domain to another or commonly known as cross-domain transfer. CycleGAN, a widely used cross-domain GAN, is discussed and implemented in Keras. This chapter also demonstrates CycleGAN performing colorization and style transfer.

Chapter 8, *Variational Autoencoders (VAEs)*, discusses another recent significant advance in deep learning. Similar to GAN, VAE is a generative model that is used to produce synthetic data. Unlike GAN, VAE focuses on decodable continuous latent space that is suitable for variational inference. VAE and its variations, CVAE and -VAE, are covered and implemented in Keras.

Chapter 9, *Deep Reinforcement Learning*, explains the principles of reinforcement learning and Q-Learning. Two techniques in implementing Q-Learning for discrete action spaces are presented, Q Table update and Deep Q Network (DQN). Implementation of Q-Learning using Python and DQN in Keras are demonstrated in OpenAI gym environments.

Chapter 10, *Policy Gradient Methods*, explains how to use neural networks to learn the policy for decision making in reinforcement learning. Four methods are covered and implemented in Keras and OpenAI gym environment, REINFORCE, REINFORCE with Baseline, Actor-Critic, and Advantage Actor-Critic. The example presented in this chapter demonstrates policy gradient methods on a continuous action space.