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

Styling applications


Qt supports styling in using the QStyle class and Qt Style Sheets. QStyle is the base class for all styles in Qt, and it encapsulates the styling of the Qt user interfaces. Covering the QStyle class is out of the scope of this book, but it should still be noted that creating a sub-class of QStyle and implementing different styling capabilities in it is ultimately the most powerful method of changing the look and feel of a Qt application. However, Qt also offers Style Sheets to style applications. Qt Style Sheets are almost identical in syntax to HTML CSS (Cascading Style Sheets), which is an inseparable part of styling in web pages.

Note

CSS is a styling language that can be used to define the way objects on a user interface look. In general, using CSS files helps separate the styling of web pages from the underlying implementation. Qt uses a very similar method in its Style Sheets to describe the way widgets look. If you are familiar with CSS files, then Qt Style Sheets...