Book Image

Advanced Deep Learning with Keras

By : Rowel Atienza
Book Image

Advanced Deep Learning with Keras

By: Rowel Atienza

Overview of this book

Recent developments in deep learning, including Generative Adversarial Networks (GANs), Variational Autoencoders (VAEs), and Deep Reinforcement Learning (DRL) are creating impressive AI results in our news headlines - such as AlphaGo Zero beating world chess champions, and generative AI that can create art paintings that sell for over $400k because they are so human-like. Advanced Deep Learning with Keras is a comprehensive guide to the advanced deep learning techniques available today, so you can create your own cutting-edge AI. Using Keras as an open-source deep learning library, you'll find hands-on projects throughout that show you how to create more effective AI with the latest techniques. The journey begins with an overview of MLPs, CNNs, and RNNs, which are the building blocks for the more advanced techniques in the book. You’ll learn how to implement deep learning models with Keras and TensorFlow 1.x, and move forwards to advanced techniques, as you explore deep neural network architectures, including ResNet and DenseNet, and how to create autoencoders. You then learn all about GANs, and how they can open new levels of AI performance. Next, you’ll get up to speed with how VAEs are implemented, and you’ll see how GANs and VAEs have the generative power to synthesize data that can be extremely convincing to humans - a major stride forward for modern AI. To complete this set of advanced techniques, you'll learn how to implement DRL such as Deep Q-Learning and Policy Gradient Methods, which are critical to many modern results in AI.
Table of Contents (16 chapters)
Advanced Deep Learning with Keras
Contributors
Preface
Other Books You May Enjoy
Index

Disentangled representations


The original GAN was able to generate meaningful outputs, but the downside was that it couldn't be controlled. For example, if we trained a GAN to learn the distribution of celebrity faces, the generator would produce new images of celebrity-looking people. However, there is no way to influence the generator on the specific attributes of the face that we want. For example, we're unable to ask the generator for a face of a female celebrity with long black hair, a fair complexion, brown eyes, and whose smiling. The fundamental reason for this is because the 100-dim noise code that we use entangles all of the salient attributes of the generator outputs. We can recall that in Keras, the 100-dim code was generated by random sampling of uniform noise distribution:

# generate 64 fake images from 64 x 100-dim uniform noise
noise = np.random.uniform(-1.0, 1.0, size=[64, 100])
fake_images = generator.predict(noise)

If we are able to modify the original GAN, such that we...