Book Image

Mastering PyTorch

By : Ashish Ranjan Jha
Book Image

Mastering PyTorch

By: Ashish Ranjan Jha

Overview of this book

Deep learning is driving the AI revolution, and PyTorch is making it easier than ever before for anyone to build deep learning applications. This PyTorch book will help you uncover expert techniques to get the most out of your data and build complex neural network models. The book starts with a quick overview of PyTorch and explores using convolutional neural network (CNN) architectures for image classification. You'll then work with recurrent neural network (RNN) architectures and transformers for sentiment analysis. As you advance, you'll apply deep learning across different domains, such as music, text, and image generation using generative models and explore the world of generative adversarial networks (GANs). You'll not only build and train your own deep reinforcement learning models in PyTorch but also deploy PyTorch models to production using expert tips and techniques. Finally, you'll get to grips with training large models efficiently in a distributed manner, searching neural architectures effectively with AutoML, and rapidly prototyping models using PyTorch and fast.ai. By the end of this PyTorch book, you'll be able to perform complex deep learning tasks using PyTorch to build smart artificial intelligence models.
Table of Contents (20 chapters)
1
Section 1: PyTorch Overview
4
Section 2: Working with Advanced Neural Network Architectures
8
Section 3: Generative Models and Deep Reinforcement Learning
13
Section 4: PyTorch in Production Systems

Summary

This chapter discussed the concept of combining a CNN model and an LSTM model in an encoder-decoder framework, jointly training them, and using the combined model to generate captions for an image. We first described what the model architecture for such a system would look like and how minor changes to the architecture could lead to solving different applications, such as activity recognition and video description. We also explored what building a vocabulary for a text dataset means in practice.

In the second and final part of this chapter, we actually implemented an image captioning system using PyTorch. We downloaded datasets, wrote our own custom PyTorch dataset loader, built a vocabulary based on the caption text dataset, and applied transformations to images, such as reshaping, normalizing, random cropping, and horizontal flipping. We then defined the CNN-LSTM model architecture, along with the loss function and optimization schedule, and finally, we ran the training...