To get the most out of this book

1. We are required to have Julia v. 1.0 or above installed
2. We need to ensure that our Julia environment has all the required prerequisites mentioned in every chapter

Download the example code files

You can download the example code files for this book from your account at www.packtpub.com. If you purchased this book elsewhere, you can visit www.packtpub.com/support and register to have the files emailed directly to you.

You can download the code files by following these steps:

1. Log in or register at www.packtpub.com.
2. Select the SUPPORT tab.
3. Click on Code Downloads & Errata.
4. Enter the name of the book in the Search box and follow the onscreen instructions.

Once the file is downloaded, please make sure that you unzip or extract the folder using the latest version of:

• WinRAR/7-Zip for Windows
• Zipeg/iZip/UnRarX for Mac
• 7-Zip/PeaZip for Linux

The code bundle for the book is also hosted on GitHub at https://github.com/PacktPublishing/Hands-On-Computer-Vision-with-Julia. In case there's an update to the code, it will be updated on the existing GitHub repository.

We also have other code bundles from our rich catalog of books and videos available at https://github.com/PacktPublishing/. Check them out!

Download the color images

We also provide a PDF file that has color images of the screenshots/diagrams used in this book. You can download it here: https://www.packtpub.com/sites/default/files/downloads/HandsOnComputerVisionwithJulia_ColorImages.pdf.

Conventions used

There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "You can confirm your version number by typing VERSION in the Julia console or REPL."

A block of code is set as follows:

 using Images

  sample_image_path = "sample-images/cats-3061372_640.jpg";
  sample_image = nothing

  if isfile(sample_image_path)
     sample_image = load(sample_image_path);
  else
     info("ERROR: Image not found!")
  end

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

using Images, ImageView
  img = load("sample-images/cats-3061372_640.jpg");
  imshow(img);

Any command-line input or output is written as follows:

julia> using Images
julia> pwd()
"/Users/dc/reps/packt-julia"

Warnings or important notes appear like this.

Tips and tricks appear like this.