Mastering OpenCV 3 - Second Edition

Practical Computer Vision Projects

About This Book

• Updated for OpenCV 3, this book covers new features that will help you unlock the full potential of OpenCV 3
• Written by a team of 7 experts, each chapter explores a new aspect of OpenCV to help you make amazing computer-vision aware applications
• Project-based approach with each chapter being a complete tutorial, showing you how to apply OpenCV to solve complete problems

Who This Book Is For

This book is for those who have a basic knowledge of OpenCV and are competent C++ programmers. You need to have an understanding of some of the more theoretical/mathematical concepts, as we move quite quickly throughout the book.

What You Will Learn

• Execute basic image processing operations and cartoonify an image
• Build an OpenCV project natively with Raspberry Pi and cross-compile it for Raspberry Pi.text
• Extend the natural feature tracking algorithm to support the tracking of multiple image targets on a video
• Use OpenCV 3's new 3D visualization framework to illustrate the 3D scene geometry
• Create an application for Automatic Number Plate Recognition (ANPR) using a support vector machine and Artificial Neural Networks
• Train and predict pattern-recognition algorithms to decide whether an image is a number plate
• Use POSIT for the six degrees of freedom head pose
• Train a face recognition database using deep learning and recognize faces from that database

In Detail

As we become more capable of handling data in every kind, we are becoming more reliant on visual input and what

Daniel Lélis Baggio started his work in computer vision through medical image processing at InCor (Instituto do Coração Heart Institute) in São Paulo, where he worked with intra-vascular ultrasound image segmentation. Since then, he has focused on GPGPU and ported the segmentation algorithm to work with NVIDIA's CUDA. He has also dived into six degrees of freedom head tracking with a natural user interface group through a project called ehci ( http://code.google.com/p/ehci/). He now works for the Brazilian Air Force.

Shervin Emami, born in Iran, taught himself electronics and hobby robotics during his early teens in Australia. While building his first robot at the age of 15, he learned how RAM and CPUs work. He was so amazed by the concept that he soon designed and built a whole Z80 motherboard to control his robot, and wrote all the software purely in binary machine code using two push buttons for 0s and 1s.

After learning that computers can be programmed in much easier ways such as assembly language and even high-level compilers, Shervin became hooked on computer programming and has been programming desktops, robots, and smartphones nearly every day since then. During his late teens, he created Draw3D ( http://draw3d.shervinemami.info/), a 3D modeler with 30,000 lines of optimized C and assembly code that rendered 3D graphics faster than all the commercial alternatives of the time, but he lost interest in graphics programming when 3D hardware acceleration became available.

In University, Shervin took a class on computer vision and became greatly interested in it, so for his first thesis in 2003, he created a real-time face detection program based on Eigenfaces, using OpenCV (beta 3) for the camera input. For his master's thesis in 2005, he created a visual navigation system for several mobile robots using OpenCV (v0.96).

From 2008, he worked as a freelance Computer Vision Developer in Abu Dhabi and Philippines, using OpenCV for a large number of short-term commercial projects that included:

• Detecting faces using Haar or Eigenfaces
• Recognizing faces using Neural Networks, EHMM, or Eigenfaces
• Detecting the 3D position and orientation of a face from a single photo using

AAM and POSIT

• Rotating a face in 3D using only a single photo
• Face preprocessing and artificial lighting using any 3D direction from a single photo
• Gender recognition
• Facial expression recognition
• Skin detection
• Iris detection
• Pupil detection
• Eye-gaze tracking
• Visual-saliency tracking
• Histogram matching
• Body-size detection
• Shirt and bikini detection
• Money recognition
• Video stabilization
• Face recognition on iPhone
• Food recognition on iPhone
• Marker-based augmented reality on iPhone (the second-fastest iPhone augmented reality app at the time)

OpenCV was putting food on the table for Shervin's family, so he began giving back to OpenCV through regular advice on the forums and by posting free OpenCV tutorials on his website ( http://www.shervinemami.info/openCV.html). In 2011, he contacted the owners of other free OpenCV websites to write this book. He also began working on computer vision optimization for mobile devices at NVIDIA, working closely with the official OpenCV developers to produce an optimized version of OpenCV for Android. In 2012, he also joined the Khronos OpenVL committee for standardizing the hardware acceleration of computer vision for mobile devices, on which OpenCV will be based in the future.

David Millán Escrivá was eight years old when he wrote his first program on an 8086 PC with Basic language, which enabled the 2D plotting of basic equations. In 2005, he finished his studies in IT through the