Conventions

In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "Another way to get the source code is by using the git tool."

A block of code is set as follows:

<manifest>
  <addClasspath>true</addClasspath>
  <classpathPrefix>lib/</classpathPrefix>
  <mainClass>com.mycompany.app.App</mainClass>
</manifest>

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

imageView.addMouseListener(new MouseAdapter()
{
  public void mousePressed(MouseEvent e)
  {
    Core.circle(image,new Point(e.getX(),e.getY()),20, new Scalar(0,0,255), 4);
    updateView(image);
  }
});

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

sudo apt-get install build-essential cmake git libgtk2.0-dev pkg-config libavcodec-dev libavformat-dev libswscale-dev python-dev python-numpy libtbb2 libtbb-dev libjpeg-dev libpng-dev libtiff-dev libjasper-dev libdc1394-22-dev ant

New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: " Go to Window | Preferences, and type classpath variables in the search box."

Note

Warnings or important notes appear in a box like this.

Tip

Tips and tricks appear like this.