Book Image

Advanced Deep Learning with TensorFlow 2 and Keras - Second Edition

By : Rowel Atienza
Book Image

Advanced Deep Learning with TensorFlow 2 and Keras - Second Edition

By: Rowel Atienza

Overview of this book

Advanced Deep Learning with TensorFlow 2 and Keras, Second Edition is a completely updated edition of the bestselling guide to the advanced deep learning techniques available today. Revised for TensorFlow 2.x, this edition introduces you to the practical side of deep learning with new chapters on unsupervised learning using mutual information, object detection (SSD), and semantic segmentation (FCN and PSPNet), further allowing you to create your own cutting-edge AI projects. Using Keras as an open-source deep learning library, the book features hands-on projects that show you how to create more effective AI with the most up-to-date techniques. Starting with an overview of multi-layer perceptrons (MLPs), convolutional neural networks (CNNs), and recurrent neural networks (RNNs), the book then introduces more cutting-edge techniques as you explore deep neural network architectures, including ResNet and DenseNet, and how to create autoencoders. You will then learn about GANs, and how they can unlock new levels of AI performance. Next, you’ll discover how a variational autoencoder (VAE) is implemented, and how GANs and VAEs have the generative power to synthesize data that can be extremely convincing to humans. You'll also learn 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)
14
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15
Index

Semantic Segmentation

In Chapter 11, Object Detection, we discussed object detection as an important computer vision algorithm with diverse practical applications. In this chapter, we will discuss another related algorithm called Semantic Segmentation. If the goal of object detection is to perform simultaneous localization and identification of each object in the image, in semantic segmentation, the aim is to classify each pixel according to its object class.

Extending the analogy further, in object detection, we use bounding boxes to show results. In semantic segmentation, all pixels for the same object belong to the same category. Visually, all pixels of the same object will have the same color. For example, all pixels belonging to the soda can category will be blue in color. Pixels for non-soda can objects will have a different color.

Similar to object detection, semantic segmentation has many practical applications. In medical imaging, it can be...