Book Image

Neural Networks with Keras Cookbook

By : V Kishore Ayyadevara
Book Image

Neural Networks with Keras Cookbook

By: V Kishore Ayyadevara

Overview of this book

This book will take you from the basics of neural networks to advanced implementations of architectures using a recipe-based approach. We will learn about how neural networks work and the impact of various hyper parameters on a network's accuracy along with leveraging neural networks for structured and unstructured data. Later, we will learn how to classify and detect objects in images. We will also learn to use transfer learning for multiple applications, including a self-driving car using Convolutional Neural Networks. We will generate images while leveraging GANs and also by performing image encoding. Additionally, we will perform text analysis using word vector based techniques. Later, we will use Recurrent Neural Networks and LSTM to implement chatbot and Machine Translation systems. Finally, you will learn about transcribing images, audio, and generating captions and also use Deep Q-learning to build an agent that plays Space Invaders game. By the end of this book, you will have developed the skills to choose and customize multiple neural network architectures for various deep learning problems you might encounter.
Table of Contents (18 chapters)

Categorizing news articles into topics

In the previous case studies, we analyzed datasets that were structured, that is, contained variables and their corresponding values. In this case study, we will be working on a dataset that has text as input, and the expected output is one of the 46 possible topics that the text is related to.

Getting ready

To understand the intuition of performing text analysis, let's consider the Reuters dataset, where each news article is classified into one of the 46 possible topics.

We will adopt the following strategy to perform our analysis:

  • Given that a dataset could contain thousands of unique words, we will shortlist the words that we shall consider.
  • For this specific exercise, we shall...