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)

Impact of batch size on model accuracy

In the previous sections, for all the models that we have built, we considered a batch size of 32. In this section, we will try to understand the impact of varying the batch size on accuracy.

Getting ready

To understand the reason batch size has an impact on model accuracy, let's contrast two scenarios where the total dataset size is 60,000:

  • Batch size is 30,000
  • Batch size is 32

When the batch size is large, the number of times of weight update per epoch is small, when compared to the scenario when the batch size is small.

The reason for a high number of weight updates per epoch when the batch size is small is that less data points are considered to calculate the loss value. This...