Book Image

Hands-On Image Generation with TensorFlow

By : Soon Yau Cheong
Book Image

Hands-On Image Generation with TensorFlow

By: Soon Yau Cheong

Overview of this book

The emerging field of Generative Adversarial Networks (GANs) has made it possible to generate indistinguishable images from existing datasets. With this hands-on book, you’ll not only develop image generation skills but also gain a solid understanding of the underlying principles. Starting with an introduction to the fundamentals of image generation using TensorFlow, this book covers Variational Autoencoders (VAEs) and GANs. You’ll discover how to build models for different applications as you get to grips with performing face swaps using deepfakes, neural style transfer, image-to-image translation, turning simple images into photorealistic images, and much more. You’ll also understand how and why to construct state-of-the-art deep neural networks using advanced techniques such as spectral normalization and self-attention layer before working with advanced models for face generation and editing. You'll also be introduced to photo restoration, text-to-image synthesis, video retargeting, and neural rendering. Throughout the book, you’ll learn to implement models from scratch in TensorFlow 2.x, including PixelCNN, VAE, DCGAN, WGAN, pix2pix, CycleGAN, StyleGAN, GauGAN, and BigGAN. By the end of this book, you'll be well versed in TensorFlow and be able to implement image generative technologies confidently.
Table of Contents (15 chapters)
1
Section 1: Fundamentals of Image Generation with TensorFlow
5
Section 2: Applications of Deep Generative Models
9
Section 3: Advanced Deep Generative Techniques

Text to image

Text-to-image GANs are conditional GANs. However, instead of using class labels as conditions, they use words as the condition to generate images. In earlier practice, GANs used word embeddings as the conditions into the generator and discriminator. Their architectures are similar to conditional GANs, which we learned about in Chapter 4, Image-to-Image Translation. The difference is merely that the embedding of text is generated using a natural language processing (NLP) preprocessing pipeline. The following diagram shows the architecture of a text-conditional GAN:

Figure 10.5 – Text-conditional convolutional GAN architecture where text encoding is used by both the generator and discriminator (Redrawn from: S. Reed et al., 2016, "Generative Adversarial Text to Image Synthesis," https://arxiv.org/abs/1605.05396)

Like normal GANs, generated high-resolution images tend to be blurry. StackGAN resolves this by stacking two networks...