As always, Mom, Dad, and the cats have provided all kinds of support, including assistance with the photography in this book.

I am glad for this chance to recognize the iOS developers who trained me years ago. They include Alex Brodsky, Bill Wilson, Jesse Rusak, and Woody Lidstone.

During the writing of this book, I have benefitted from the opportunity to do other OpenCV projects with local colleagues such as Jeff Leadbetter, Matt Wright, Jad Tawil, and Kevin J. Gallant. I am proud that we are part of a growing computer vision community in Atlantic Canada.

Once again, the team at Packt Publishing has supported me with tremendous energy, skill, and loyalty. Thank you! Harsha Bharwani persuaded me to write another OpenCV book. After all, the set was incomplete without iOS. Samantha Gonsalves guided the project to completion, and she never let any complication discourage her or me. All the editors and the technical reviewer have added their marks of quality to the book, and have helped it speak to its audience. Please meet the technical reviewer by reading his biography here.

Finally, I want to thank my readers and the OpenCV community for the great years of learning that we have shared, and even greater years ahead!