Book Image

Modern Computer Vision with PyTorch

By : V Kishore Ayyadevara, Yeshwanth Reddy
Book Image

Modern Computer Vision with PyTorch

By: V Kishore Ayyadevara, Yeshwanth Reddy

Overview of this book

Deep learning is the driving force behind many recent advances in various computer vision (CV) applications. This book takes a hands-on approach to help you to solve over 50 CV problems using PyTorch1.x on real-world datasets. You’ll start by building a neural network (NN) from scratch using NumPy and PyTorch and discover best practices for tweaking its hyperparameters. You’ll then perform image classification using convolutional neural networks and transfer learning and understand how they work. As you progress, you’ll implement multiple use cases of 2D and 3D multi-object detection, segmentation, human-pose-estimation by learning about the R-CNN family, SSD, YOLO, U-Net architectures, and the Detectron2 platform. The book will also guide you in performing facial expression swapping, generating new faces, and manipulating facial expressions as you explore autoencoders and modern generative adversarial networks. You’ll learn how to combine CV with NLP techniques, such as LSTM and transformer, and RL techniques, such as Deep Q-learning, to implement OCR, image captioning, object detection, and a self-driving car agent. Finally, you'll move your NN model to production on the AWS Cloud. By the end of this book, you’ll be able to leverage modern NN architectures to solve over 50 real-world CV problems confidently.
Table of Contents (25 chapters)
1
Section 1 - Fundamentals of Deep Learning for Computer Vision
5
Section 2 - Object Classification and Detection
13
Section 3 - Image Manipulation
17
Section 4 - Combining Computer Vision with Other Techniques

Chapter 16 - Combining Computer Vision and Reinforcement Learning

  1. How is the value calculated for a given state?
    By computing the expected reward at that state
  2. How is the Q-table populated?
    By computing expected reward for all states
  3. Why do we have a discount factor in state action value calculation?
    Due to uncertainty, we are unsure of how the future might work. Hence we reduce future rewards' weightage which is done by the way of discounting
  4. What is the need for an exploration-exploitation strategy?
    Only exploitation will make the model stagnant and predictable and hence model should be able to explore and find unseen steps that can be even more rewarding than what the model already has already learned.
  1. What is the need for Deep Q-Learning?
    We let the neural network learn the likely reward system without the need for costly algorithms that may take too much time or demand visibility of the entire environment.
  2. How is the value of a given state action combination calculated using...