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)

Varying the loss optimizer to improve network accuracy

So far, in the previous recipes, we considered the loss optimizer to be the Adam optimizer. However, there are multiple other variants of optimizers, and a change in the optimizer is likely to impact the speed with which the model learns to fit the input and the output.

In this recipe, we will understand the impact of changing the optimizer on model accuracy.

Getting ready

To understand the impact of varying the optimizer on network accuracy, let's contrast the scenario laid out in previous sections (which was the Adam optimizer) with using a stochastic gradient descent optimizer in this section, while reusing the same MNIST training and test datasets that were scaled...