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

Summary

We began this chapter by learning how the basic cGAN enforces the class label as a condition to generate MNIST. We implemented two different ways of injecting the condition, one being to one-hot encode the class labels to a dense layer, reshape them to match the channel dimensions of the input noise, and then concatenate them together. The other way is to use the embedding layer and element-wise multiplication.

Next, we learned to implement pix2pix, a special type of condition GAN for image-to-image translation. It uses PatchGAN as a discriminator, which looks at patches of images to encourage fine details or high-frequency components in the generated image. We also learned about a popular network architecture, U-Net, that has been used for various applications. Although pix2pix can generate high-quality image translation, the image is one-to-one mapping without diversification of the output. This is due to the removal of input noise. This was overcome by BicycleGAN, which...