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 5: Basics of Image Processing

In the previous chapter, we learned about and demonstrated various ways to capture images and videos for image processing and computer vision applications. We learned how to use Command Prompt and Python 3 programming extensively to read images and to interface with the USB webcam and the Raspberry Pi camera module.

In this chapter, we will look at how to perform basic arithmetic and logical operations on images with NumPy, OpenCV, and matplotlib. We will also learn about different color channels and image properties in detail.

The following is a list of the topics that will be covered in this chapter:

  • Retrieving image properties
  • Basic operations on images
  • Arithmetic operations on images
  • Blending and transitioning images
  • Multiplying images by constants and one another
  • Creating a negative of an image
  • Bitwise logical operations on images

This chapter has a lot of hands-on exercises that use Python 3...