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: "To see the remaining space on your SD card, run df -h | head -2."

A block of code is set as follows:

Mat bigImg; 
 resize(smallImg, bigImg, size, 0,0, INTER_LINEAR); 
 dst.setTo(0); 
 bigImg.copyTo(dst, mask);

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

Mat bigImg; 
 resize(smallImg, bigImg, size, 0,0, INTER_LINEAR); 
 dst.setTo(0); 
 bigImg.copyTo(dst, mask);

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

sudo apt-get purge -y wolfram-engine

Bold: Indicates a new term, an important word, or words that you see on screen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "Navigate to Media | Open Network Stream."