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

Unpaired image translation with CycleGAN

CycleGAN was created by the same research group who invented pix2pix. CycleGAN could train with unpaired images using two generators and two discriminators. However, by using pix2pix as a foundation, CycleGAN is actually quite simple to implement once you understand how the cycle consistency loss works. Before this, let's try to understand the advantage of CycleGAN over pix2pix in the following sections.

Unpaired dataset

One drawback of pix2pix is that it requires a paired training dataset. For some applications, we can create a dataset rather easily. A grayscale-to-color images dataset and vice-versa is probably the simplest to create using any image processing software libraries such as OpenCV or Pillow. Similarly, we could also easily create sketches from real images using edge detection techniques. For a photo-to-artistic-painting dataset, we can use neural style transfer (we'll cover this in Chapter 5, Style Transfer) to...