Book Image

Computer Vision with OpenCV 3 and Qt5

By : Amin Ahmadi Tazehkandi
4 (1)
Book Image

Computer Vision with OpenCV 3 and Qt5

4 (1)
By: Amin Ahmadi Tazehkandi

Overview of this book

Developers have been using OpenCV library to develop computer vision applications for a long time. However, they now need a more effective tool to get the job done and in a much better and modern way. Qt is one of the major frameworks available for this task at the moment. This book will teach you to develop applications with the combination of OpenCV 3 and Qt5, and how to create cross-platform computer vision applications. We’ll begin by introducing Qt, its IDE, and its SDK. Next you’ll learn how to use the OpenCV API to integrate both tools, and see how to configure Qt to use OpenCV. You’ll go on to build a full-fledged computer vision application throughout the book. Later, you’ll create a stunning UI application using the Qt widgets technology, where you’ll display the images after they are processed in an efficient way. At the end of the book, you’ll learn how to convert OpenCV Mat to Qt QImage. You’ll also see how to efficiently process images to filter them, transform them, detect or track objects as well as analyze video. You’ll become better at developing OpenCV applications.
Table of Contents (19 chapters)
Title Page
Dedication
Packt Upsell
Foreword
Contributors
Preface

Building Qt static libraries


By default, only dynamic Qt libraries are with the official Qt installers. This was also the case in Chapter 1, Introduction to OpenCV and Qt, when we installed Qt in our development environment by using the installers provided by the following link:

https://download.qt.io/official_releases/qt/5.9/5.9.1/

So, to put it simply, if you want to use the static Qt libraries, you must build them on your own using their source codes. You can follow the steps provided here in order to configure, build, and use static Qt libraries:

  1. To be able to build a set of static Qt libraries, you need to start by downloading the source codes from the Qt downloads website. They are usually provided as a single compressed file (*.zip, *.tar.xz, and so on) that contains all of the required codes. In our case (Qt version 5.9.1), you can use the following link to download the Qt source codes:https://download.qt.io/official_releases/qt/5.9/5.9.1/single/

Download qt-everywhere-opensource-src...