Load and Display an Image with OpenCV in Qt

After we have shown you how to configure OpenCV library to work with Qt and display a simple text in previous tutorial, we will provide another example of how to load and display image with OpenCV library in Qt in this tutorial.

In case, you have known how to install OpenCV with Qt Creator MinGW on window. Please read it first!

Loading and displaying image plays a crucial role in Computer Vision and Pattern Recognition, as well as image processing application. In this tutorial you will learn as follows:

How to configure OpenCV Library with Qt Creator

In previous post, you have already seen how to build OpenCV using CMake and Qt MinGW. In this tutorial, we will guide you how to configure Qt creator with OpenCV library. 

Then, we begin to create a simple OpenCV program to render a simple image.

How to install OpenCV with Qt Creator MinGW on Window

In previous post, knowledge hub provides reasons why you should learn OpenCV. In this post, knowledge hub will guide how to build OpenCV from source code by using OpenCV using CMake and Qt MinGW.

Before starting to build OpenCV, it supposes that you have already installed OpenCV, CMake, and Qt MinGW on your computer. 

We have opted Qt because it becomes one of the most popular frameworks to develop more advance GUI application.

What and Why OpenCV

OpenCV [OpenCV] is an open source computer vision library mainly focusing on real-time computer vision, developed by Intel Russia research center in Nizhny Novgorod, and now supported by Willow Garage and Itseez. 

It provides C++, C, Python and Java interfaces and supports a wide range of operating system such as Windows, Linux, Mac OS, iOS and Android

OpenCV was designed for computational efficiency and with a strong focus on real-time applications.