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
Other Books You May Enjoy
15
Index

4. Example dataset

We can use the dataset that we used in Chapter 11, Object Detection. Recall that we used a small dataset comprising 1,000 640 x 480 RGB train images and 50 640 x 480 RGB test images collected using an inexpensive USB camera (A4TECH PK-635G). However, instead of labeling using bounding boxes and categories, we traced the edges of each object category using a polygon shape. We used the same dataset annotator called VGG Image Annotator (VIA) [4] to manually trace the edges and assign the following labels: 1) Water bottle, 2) Soda can, and 3) Juice can.

Figure 12.4.1 shows a sample UI of the labeling process.

Figure 12.4.1: Dataset labeling process for semantic segmentation using the VGG Image Annotator (VIA)

The VIA labeling software saves the annotation on a JSON file. For the training and test datasets, these are:

segmentation_train.json
segmentation_test.json

The polygon region stored on the JSON files could not be used as it is. Each...