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)

Need for encoding

Encoding is typically used where the number of dimensions in a vector is huge. Encoding helps turn a large vector into a vector that has far fewer dimensions without losing much information from the original vector. In the following sections, let's explore the need for encoding images, text, and recommender systems.

Need for encoding in text analysis

To understand the need for encoding in text analysis, let's consider the following scenario. Let's go through the following two sentences:

In traditional text analysis, the preceding two sentences are one-hot encoded, as follows:

Note that there are five unique words in the two sentences.

The preceding one-hot encoded versions of the words result...