OpenCV 4 with Python Blueprints, Second Edition

Get to grips with traditional computer vision algorithms and deep learning approaches, and build real-world applications with OpenCV and other machine learning frameworks

Key Features

• Understand how to capture high-quality image data, detect and track objects, and process the actions of animals or humans
• Implement your learning in different areas of computer vision
• Explore advanced concepts in OpenCV such as machine learning, artificial neural network, and augmented reality

Book Description

OpenCV is a native cross-platform C++ library for computer vision, machine learning, and image processing. It is increasingly being adopted in Python for development. This book will get you hands-on with a wide range of intermediate to advanced projects using the latest version of the framework and language, OpenCV 4 and Python 3.8, instead of only covering the core concepts of OpenCV in theoretical lessons. This updated second edition will guide you through working on independent hands-on projects that focus on essential OpenCV concepts such as image processing, object detection, image manipulation, object tracking, and 3D scene reconstruction, in addition to statistical learning and neural networks.

You'll begin with concepts such as image filters, Kinect depth sensor, and feature matching. As you advance, you'll not only get hands-on with reconstructing and visualizing a scene in 3D but also learn to track visually salient objects. The book will help you further build on your skills by demonstrating how to recognize traffic signs and emotions on faces. Later, you'll understand how to align images, and detect and track objects using neural networks.

By the end of this OpenCV Python book, you'll have gained hands-on experience and become proficient at developing advanced computer vision apps according to specific business needs.

What you will learn

• Generate real-time visual effects using filters and image manipulation techniques such as dodging and burning
• Recognize hand gestures in real-time and perform hand-shape analysis based on the output of a Microsoft Kinect sensor
• Learn feature extraction and feature matching to track arbitrary objects of interest
• Reconstruct a 3D real-world scene using 2D camera motion and camera reprojection techniques
• Detect faces using a cascade classifier and identify emotions in human faces using multilayer perceptrons
• Classify, localize, and detect objects with deep neural networks

Who this book is for

This book is for intermediate-level OpenCV users who are looking to enhance their skills by developing advanced applications. Familiarity with OpenCV concepts and Python libraries, and basic knowledge of the Python programming language are assumed.

Table of Contents

1. Fun with Filters
2. Hand Gesture Recognition Using a Kinect Depth Sensor
3. Finding Objects via Feature Matching and Perspective Transforms
4. 3D Scene Reconstruction Using Structure from Motion
5. Using Computational Photography with OpenCV
6. Tracking Visually Salient Objects
7. Learning to Recognize Traffic Signs
8. Learning to Recognize Facial Emotions
9. Learning to Classify and Localize Objects
10. Learning to Detect and Track Objects
11. Appendix A: Profiling and Accelerating Your Apps
12. Appendix B: Setting Up Docker Container

Dr. Menua Gevorgyan is an experienced researcher with a demonstrated history of working in the information technology and services industry. He is skilled in computer vision, deep learning, machine learning, and data science as well as having a lot of experience with OpenCV and Python programming. He is interested in machine perception and machine understanding problems, and wonders if it is possible to make a machine perceive the world as a human does.

Arsen Mamikonyan is an experienced machine learning specialist with demonstrated work experience in Silicon Valley and London, and teaching experience at the American University of Armenia. He is skilled in applied machine learning and data science and has built real-life applications using Python and OpenCV, among others. He holds a master's degree in engineering (MEng) with a concentration on artificial intelligence from the Massachusetts Institute of Technology.

Michael Beyeler is a postdoctoral fellow in neuroengineering and data science at the University of Washington, where he is working on computational models of bionic vision in order to improve the perceptual experience of blind patients implanted with a retinal prosthesis (bionic eye).

His work lies at the intersection of neuroscience, computer engineering, computer vision, and machine learning. He is also an active contributor to several open source software projects, and has professional programming experience in Python, C/C++, CUDA, MATLAB, and Android. Michael received a PhD in computer science from the University of California, Irvine, and an MSc in biomedical engineering and a BSc in electrical engineering from ETH Zurich, Switzerland.