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)

Visualizing the output of the intermediate layers of a neural network

In the previous section, we built a model that learns to classify gender from images with an accuracy of 89%. However, as of now, it is a black box for us in terms of what the filters are learning.

In this section, we will learn how to extract what the various filters in a model are learning. Additionally, we will contrast the scenario of what the filters in the initial layers are learning with what the features in the last few layers are learning.

Getting ready

To understand how to extract what the various filters are learning, let's adopt the following strategy:

  • We will select an image on which to perform analysis.
  • We will select the first convolution...