OpenCV for Secret Agents

Joseph Howse

• Publisher: Packt Publishing
• Year: 2015
• ISBN:
  9781783287376
• Topic: Informatica
• Subtopic: Programmazione open source

OpenCV for Secret Agents

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Table of Contents

OpenCV for Secret Agents

Credits

About the Author

Acknowledgments

About the Reviewers

www.PacktPub.com

Support files, eBooks, discount offers, and more

Why subscribe?

Free access for Packt account holders

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Downloading the example code

Errata

Piracy

Questions

1. Preparing for the Mission

Setting up a development machine

Windows

OpenCV on Windows with binary installers

OpenCV on Windows with CMake and compilers

Mac

Mac with MacPorts

Mac with Homebrew

Debian Wheezy and its derivatives, including Raspbian, Ubuntu, and Linux Mint

Fedora and its derivatives, including RHEL and CentOS

openSUSE and its derivatives

Tegra Android Development Pack

Building OpenCV Android sample projects with Eclipse

Unity

Setting up Raspberry Pi

Setting up the Raspberry Pi Camera Module

Finding OpenCV documentation, help, and updates

Alternatives to Raspberry Pi

Summary

2. Searching for Luxury Accommodations Worldwide

Planning the Luxocator app

Creating, comparing, and storing histograms

Training the classifier with reference images

Acquiring images from the Web

Acquiring images from Bing image search

Preparing images and resources for the app

Integrating everything into the GUI

Building Luxocator for distribution

Summary

3. Training a Smart Alarm to Recognize the Villain and His Cat

Understanding machine learning in general

Planning the Interactive Recognizer app

Understanding Haar cascades and LBPH

Implementing the Interactive Recognizer app

Planning the cat detection model

Implementing the training script for the cat detection model

Planning the Angora Blue app

Implementing the Angora Blue app

Building Angora Blue for distribution

Further fun with finding felines

Summary

4. Controlling a Phone App with Your Suave Gestures

Planning the Goldgesture app

Understanding optical flow

Setting up the Eclipse Workspace

Getting a cascade file and audio files

Specifying the app's requirements

Laying out a camera preview as the main view

Tracking back and forth gestures

Playing audio clips as questions and answers

Capturing images and tracking faces in an activity

Summary

5. Equipping Your Car with a Rearview Camera and Hazard Detection

Planning The Living Headlights app

Detecting lights as blobs

Estimating distances (a cheap approach)

Implementing The Living Headlights app

Testing The Living Headlights app at home

Testing The Living Headlights app in a car

Summary

6. Seeing a Heartbeat with a Motion Amplifying Camera

Planning the Lazy Eyes app

Understanding what Eulerian video magnification can do

Extracting repeating signals from video using the Fast Fourier Transform (FFT)

Choosing and setting up an FFT library

Compositing two images using image pyramids

Implementing the Lazy Eyes app

Configuring and testing the app for various motions

Seeing things in another light

Summary

7. Creating a Physics Simulation Based on a Pen and Paper Sketch

Planning the Rollingball app

Detecting circles and lines

Setting up OpenCV for Unity

Configuring and building the Unity project

Creating the Rollingball scene in Unity

Creating Unity assets and adding them to the scene

Writing shaders and creating materials

Creating physics materials

Creating prefabs

Writing our first Unity script

Writing the main Rollingball script

Tidying up and testing

Summary

Index

OpenCV for Secret Agents

Copyright © 2015 Packt Publishing

All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews.

Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the author, nor Packt Publishing, and its dealers and distributors will be held liable for any damages caused or alleged to be caused directly or indirectly by this book.

Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information.

First published: January 2015

Production reference: 1230115

Published by Packt Publishing Ltd.

Livery Place

35 Livery Street

Birmingham B3 2PB, UK.

ISBN 978-1-78328-737-6

www.packtpub.com

Cover image by Jeremy Segal (<[email protected]>)

Credits

Author

Joseph Howse

Reviewers

Karan Kedar Balkar

Michael Beyeler

Demetris Gerogiannis

Kevin Hughes

Ganesh Iyer

Andrew Colin Kissa

Lihang Li

Ryohei Tanaka

Commissioning Editor

Sam Birch

Acquisition Editors

Sam Birch

Richard Brookes-Bland

Content Development Editor

Arwa Manasawala

Technical Editor

Aman Preet Singh

Copy Editor

Neha Vyas

Project Coordinator

Sageer Parkar

Proofreaders

Simran Bhogal

Ameesha Green

Paul Hindle

Clyde Jenkins

Indexer

Monica Ajmera Mehta

Graphics

Sheetal Aute

Abhinash Sahu

Production Coordinator

Arvindkumar Gupta

Cover Work

Arvindkumar Gupta

About the Author

Joseph Howse has four first-rate cats; yet, if his books sell well, he could build a menagerie fit for a pharaoh.

OpenCV for Secret Agents is Joseph's third book, following OpenCV Computer Vision with Python and Android Application Programming with OpenCV. When not writing books or grooming cats, Joseph is working to grow the augmented reality industry by providing software development and training services through his company, Nummist Media (http://nummist.com).

Acknowledgments

Many people, near and far, have guided this book to completion.

My parents, Jan and Bob, have given me nine full lives or so it seems. My four cats, Plasma Tigerlily Zoya, Sanibel Delphinium Andromeda, Lambda Catculus Puddingcat, and Josephine Antoinette Puddingcat, have provided constant supervision and contributed to testing the cat recognition software in Chapter 3, Training a Smart Alarm to Recognize the Villain and His Cat.

My readers and listeners have taken time to provide valuable feedback and ask questions about my previous books and presentations. Thanks to their loyalty and dedication to discovery, our shared exploration of OpenCV goes on!

My clients at Market Beat, in El Salvador, have inspired several of the book's topics, including detection, recognition, tracking, and the use of Raspberry Pi.

Thanks, Steven Puttemans, for the helpful discussion on Haar features. Thanks, Tanya Suhodolska, for icons used in the application bundles.

My editors at Packt Publishing have once again given me all the benefit of their skill, experience, and professionalism in the planning, polishing, and marketing of this book. Writing one of Packt's "Secret Agent" books has been a uniquely fun project! Thanks, Sam Birch, for suggesting Eulerian video magnification as the topic of Chapter 6, Seeing a Heartbeat with a Motion Amplifying Camera.

My technical reviewers have once again saved me from sundry errors and omissions. Read their biographies here! They are fine members of the OpenCV community.

Sam Howse, Bunny Moir, and dear old cats—you are remembered for the love, laughter, learning, and long journeys home.

About the Reviewers

Karan Kedar Balkar has been working as an independent Android application developer since the past 4 years. Born and brought up in Mumbai, he holds a bachelor's degree in computer engineering. He has written over 50 programming tutorials on his perso...