Book Image

Raspberry Pi Computer Vision Programming - Second Edition

By : Ashwin Pajankar
5 (1)
Book Image

Raspberry Pi Computer Vision Programming - Second Edition

5 (1)
By: Ashwin Pajankar

Overview of this book

Raspberry Pi is one of the popular single-board computers of our generation. All the major image processing and computer vision algorithms and operations can be implemented easily with OpenCV on Raspberry Pi. This updated second edition is packed with cutting-edge examples and new topics, and covers the latest versions of key technologies such as Python 3, Raspberry Pi, and OpenCV. This book will equip you with the skills required to successfully design and implement your own OpenCV, Raspberry Pi, and Python-based computer vision projects. At the start, you'll learn the basics of Python 3, and the fundamentals of single-board computers and NumPy. Next, you'll discover how to install OpenCV 4 for Python 3 on Raspberry Pi, before covering major techniques and algorithms in image processing, manipulation, and computer vision. By working through the steps in each chapter, you'll understand essential OpenCV features. Later sections will take you through creating graphical user interface (GUI) apps with GPIO and OpenCV. You'll also learn to use the new computer vision library, Mahotas, to perform various image processing operations. Finally, you'll explore the Jupyter Notebook and how to set up a Windows computer and Ubuntu for computer vision. By the end of this book, you'll be able to confidently build and deploy computer vision apps.
Table of Contents (15 chapters)

Chapter 3: Introduction to Python Programming

In the previous chapter, we learned how to remotely access the Command Prompt and the desktop of a Raspberry Pi (RPi) board. We also installed OpenCV for Python 3. Finally, we learned how to overclock the RPi and examined the various heatsinks for the RPi.

Continuing from where we left off at the end of the previous chapter, in this chapter, we will start by looking at Python 3 programming on the RPi. We will have a brief look at the Scientific Python (SciPy) ecosystem and all the libraries in it. Then, we will write basic programs for numerical computation with NumPy N-Dimensional Arrays (ndarrays). We will also learn how to visualize data with Matplotlib. Finally, we will explore the hardware aspects of the RPi with the General Purpose Input Output (GPIO) library of Python for the RPi.

In short, we will cover the following topics:

  • Understanding Python 3
  • The SciPy ecosystem
  • Programming with NumPy and Matplotlib
  • ...