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)

Building a LSTM Network from scratch in Python

In the previous section on issues with traditional RNN, we learned about how RNN does not help when there is a long-term dependency. For example, imagine the input sentence is as follows:

I live in India. I speak ____.

The blank space in the preceding statement could be filled by looking at the key word, India, which is three time steps prior to the word we are trying to predict.

In a similar manner, if the key word is far away from the word to predict, vanishing/exploding gradient problems need to be solved.

Getting ready

In this recipe, we'll learn how LSTM helps in overcoming the long-term dependency drawback of the RNN architecture and also build a toy example so that...