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Home Backend Development C++ How to Successfully Link OpenCV and Qt Libraries in Qt Creator?

How to Successfully Link OpenCV and Qt Libraries in Qt Creator?

Dec 01, 2024 pm 09:13 PM

How to Successfully Link OpenCV and Qt Libraries in Qt Creator?

Linking OpenCV in QtCreator with Qt Library

Problem: Despite following guidance, attempts to link OpenCV and the Qt library in QtCreator have been unsuccessful.

Installation:

  1. Ensure QtCreator is installed with the Qt and MinGW toolkits.
  2. Download the OpenCV installer and extract it to a directory without spaces in the path.
  3. Install cmake and set the PATH environment variable to include MinGW's compiler path.
  4. Utilize cmake-gui to generate MinGW Makefiles and specify compiler paths.
  5. Unselect "WITH_TBB," "WITH_IPP," and "WITH_CUDA" while selecting "WITH_QT" and setting "CMAKE_BUILD_TYPE" to "Debug."
  6. Compile and install OpenCV by navigating to the opencv_bin directory and executing "mingw32-make" and "mingw32-make install."
  7. Add the QtCreator bin path to the PATH variable.

Project Configuration in QtCreator:

  1. Create a new console application.
  2. Include the following line in the .pro file:

    INCLUDEPATH += C:/Programs/opencv24/opencv_bin2/install/include
  3. Add the following lines to the .pro file:

    LIBS += -LC:\Programs\opencv24\opencv_bin2\bin \
    libopencv_core240d \
    libopencv_highgui240d \
    libopencv_imgproc240d \
    libopencv_features2d240d \
    libopencv_calib3d240d
  4. Ensure the main.cpp file includes the necessary OpenCV headers and correctly employs OpenCV functions.

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