Book Image

Learning OpenCV 4 Computer Vision with Python 3 - Third Edition

By : Joseph Howse, Joe Minichino
Book Image

Learning OpenCV 4 Computer Vision with Python 3 - Third Edition

By: Joseph Howse, Joe Minichino

Overview of this book

Computer vision is a rapidly evolving science, encompassing diverse applications and techniques. This book will not only help those who are getting started with computer vision but also experts in the domain. You’ll be able to put theory into practice by building apps with OpenCV 4 and Python 3. You’ll start by understanding OpenCV 4 and how to set it up with Python 3 on various platforms. Next, you’ll learn how to perform basic operations such as reading, writing, manipulating, and displaying still images, videos, and camera feeds. From taking you through image processing, video analysis, and depth estimation and segmentation, to helping you gain practice by building a GUI app, this book ensures you’ll have opportunities for hands-on activities. Next, you’ll tackle two popular challenges: face detection and face recognition. You’ll also learn about object classification and machine learning concepts, which will enable you to create and use object detectors and classifiers, and even track objects in movies or video camera feed. Later, you’ll develop your skills in 3D tracking and augmented reality. Finally, you’ll cover ANNs and DNNs, learning how to develop apps for recognizing handwritten digits and classifying a person's gender and age. By the end of this book, you’ll have the skills you need to execute real-world computer vision projects.
Table of Contents (13 chapters)

Summary

This chapter scratched the surface of the vast and fascinating world of ANNs. We learned about the structure of ANNs, and how to design a network topology based on application requirements. Then, we focused on OpenCV's implementation of MLP ANNs, as well as on OpenCV's support for diverse DNNs that have been trained in other frameworks.

We applied neural networks to real-world problems: notably, handwritten digit recognition; object detection and classification; and a combination of face detection, age classification, and gender classification in real time. We saw that even in these introductory demos, neural networks show a lot of promise in terms of versatility, accuracy, and speed. Hopefully, this encourages you to try out pre-trained models from various authors, and to learn to train advanced models of your own in various frameworks.

With this thought,...