YouTube

Tutorial Qt Creator – OpenCV

Mat to QImage

QPixmap fromImage gives segment fault on image converted from cv::mat
Converting Between cv::Mat and QImage or QPixmap
github.com/asmaloney/asmOpenCV, Simple methods to convert between OpenCV’s cv::Mat and Qt’s QImage and QPixmap

QImage image(cpy.data,
             cpy.cols,
             cpy.rows,
             cpy.step,
             QImage::Format_RGB888);
image = image.rgbSwapped();

Rest

OpenCV Installation

MingW

How to setup Qt and openCV on Windows
github.com/huihut/OpenCV-MinGW-Build, MinGW 32bit and 64bit version of OpenCV compiled on Windows.
install opencv 3.4.1 and Qt 5.10 with CMAKE

CMake

How to Use CMake with Qt5 and OpenCV 3 Projects

Off-Topic

How opencv 4.x API is different from previous version?
1- OpenCV 4, Deep Learning, Computer Vision
3 – OpenCV 4 , Deep Learning for Computer Vision
What is the difference of shaders with extensions .Shader, .vsh, .fsh