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Error: undefined reference to `cvReleaseImage' (opencv + Qt)

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  • N Negar_mg
    29 Jun 2021, 07:19

    I do not need vs and i have uninstalled it
    But i still get the error mentioned above
    How can i install opencv on qt without visual studio?

    J Online
    J Online
    jsulm
    Lifetime Qt Champion
    wrote on 29 Jun 2021, 07:22 last edited by
    #25

    @Negar_mg Build OpenCV using the compiler you're using with Qt...
    @mrjj Already gave you a link: https://wiki.qt.io/How_to_setup_Qt_and_openCV_on_Windows
    Also there is official OpenCV documentation for that: https://docs.opencv.org/3.4/d3/d52/tutorial_windows_install.html

    https://forum.qt.io/topic/113070/qt-code-of-conduct

    1 Reply Last reply
    1
    • N Offline
      N Offline
      Negar_mg
      wrote on 29 Jun 2021, 07:40 last edited by
      #26

      I have followed the steps in the link you provided, but cmake step raised some errors. Its log is bellow:

      Log:
      {sizeof(void) = 4 on 64 bit processor. Assume 32-bit compilation mode
      Found PythonInterp: C:/Users/test/AppData/Local/Programs/Python/Python37/python.exe (found suitable version "3.7", minimum required is "2.7")
      CMake Warning at cmake/OpenCVDetectPython.cmake:81 (message):
      CMake's 'find_host_package(PythonInterp 2.7)' found wrong Python version:
      PYTHON_EXECUTABLE=C:/Users/test/AppData/Local/Programs/Python/Python37/python.exe
      PYTHON_VERSION_STRING=3.7
      Consider providing the 'PYTHON2_EXECUTABLE' variable via CMake command line
      or environment variables
      Call Stack (most recent call first):
      cmake/OpenCVDetectPython.cmake:271 (find_python)
      CMakeLists.txt:614 (include)
      Could NOT find Python2 (missing: Python2_EXECUTABLE Interpreter)
      Reason given by package:
      Interpreter: Wrong major version for the interpreter "C:/Users/test/AppData/Local/Programs/Python/Python37/python.exe"
      }
      //..............................
      {
      Performing Test HAVE_CXX_WNO_ENUM_COMPARE_SWITCH - Failed
      Could NOT find JNI (missing: JAVA_AWT_LIBRARY JAVA_JVM_LIBRARY JAVA_INCLUDE_PATH JAVA_INCLUDE_PATH2 JAVA_AWT_INCLUDE_PATH)
      VTK is not found. Please set -DVTK_DIR in CMake to VTK build directory, or to VTK install subdirectory with VTKConfig.cmake file
      ADE: Download: v0.1.1f.zip
      Try 1 failed
      CMake Warning at cmake/OpenCVDownload.cmake:202 (message):
      ADE: Download failed: 35;"SSL connect error"
      For details please refer to the download log file:
      C:/Qt/opencv_cv2/opencv/release/CMakeDownloadLog.txt
      Call Stack (most recent call first):
      modules/gapi/cmake/DownloadADE.cmake:5 (ocv_download)
      modules/gapi/cmake/init.cmake:19 (include)
      cmake/OpenCVModule.cmake:298 (include)
      cmake/OpenCVModule.cmake:361 (_add_modules_1)
      modules/CMakeLists.txt:7 (ocv_glob_modules)
      OpenCV Python: during development append to PYTHONPATH: C:/Qt/opencv_cv2/opencv/release/python_loader
      Could NOT find PkgConfig (missing: PKG_CONFIG_EXECUTABLE)
      FFMPEG: Download: opencv_videoio_ffmpeg.dll
      Try 1 failed
      CMake Warning at cmake/OpenCVDownload.cmake:202 (message):
      FFMPEG: Download failed: 35;"SSL connect error"
      For details please refer to the download log file:
      C:/Qt/opencv_cv2/opencv/release/CMakeDownloadLog.txt
      Call Stack (most recent call first):
      3rdparty/ffmpeg/ffmpeg.cmake:20 (ocv_download)
      modules/videoio/cmake/detect_ffmpeg.cmake:14 (download_win_ffmpeg)
      modules/videoio/cmake/init.cmake:7 (include)
      modules/videoio/cmake/init.cmake:18 (add_backend)
      cmake/OpenCVModule.cmake:298 (include)
      cmake/OpenCVModule.cmake:361 (_add_modules_1)
      modules/CMakeLists.txt:7 (ocv_glob_modules)
      FFMPEG: Download: opencv_videoio_ffmpeg_64.dll
      Try 1 failed
      CMake Warning at cmake/OpenCVDownload.cmake:202 (message):
      FFMPEG: Download failed: 35;"SSL connect error"
      For details please refer to the download log file:
      C:/Qt/opencv_cv2/opencv/release/CMakeDownloadLog.txt
      Call Stack (most recent call first):
      3rdparty/ffmpeg/ffmpeg.cmake:20 (ocv_download)
      modules/videoio/cmake/detect_ffmpeg.cmake:14 (download_win_ffmpeg)
      modules/videoio/cmake/init.cmake:7 (include)
      modules/videoio/cmake/init.cmake:18 (add_backend)
      cmake/OpenCVModule.cmake:298 (include)
      cmake/OpenCVModule.cmake:361 (_add_modules_1)
      modules/CMakeLists.txt:7 (ocv_glob_modules)
      FFMPEG: Download: ffmpeg_version.cmake
      Try 1 failed
      CMake Warning at cmake/OpenCVDownload.cmake:202 (message):
      FFMPEG: Download failed: 35;"SSL connect error"
      For details please refer to the download log file:
      C:/Qt/opencv_cv2/opencv/release/CMakeDownloadLog.txt
      Call Stack (most recent call first):
      3rdparty/ffmpeg/ffmpeg.cmake:20 (ocv_download)
      modules/videoio/cmake/detect_ffmpeg.cmake:14 (download_win_ffmpeg)
      modules/videoio/cmake/init.cmake:7 (include)
      modules/videoio/cmake/init.cmake:18 (add_backend)
      cmake/OpenCVModule.cmake:298 (include)
      cmake/OpenCVModule.cmake:361 (_add_modules_1)
      modules/CMakeLists.txt:7 (ocv_glob_modules)
      }
      //........................................
      {
      Performing Test HAVE_CXX_WNO_UNUSED_PRIVATE_FIELD - Failed
      CMake Warning at cmake/OpenCVGenSetupVars.cmake:54 (message):
      CONFIGURATION IS NOT SUPPORTED: validate setupvars script in install
      directory
      Call Stack (most recent call first):
      CMakeLists.txt:1010 (include)
      }

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      0
      • M Offline
        M Offline
        mrjj
        Lifetime Qt Champion
        wrote on 29 Jun 2021, 07:42 last edited by
        #27

        Hi
        Could you try with python 2.7 instead?

        It seems to complain about the 3.7 version

        CMake's 'find_host_package(PythonInterp 2.7)' found wrong Python version:
        Could NOT find Python2 (missing: Python2_EXECUTABLE Interpreter)
        Wrong major version for the interpreter "C:/Users/test/AppData/Local/Programs/Python/Python37/python.exe"

        1 Reply Last reply
        0
        • N Offline
          N Offline
          Negar_mg
          wrote on 29 Jun 2021, 08:22 last edited by
          #28

          How can i try it with python 2.7? What should i change in tutorial steps?

          J M 2 Replies Last reply 29 Jun 2021, 08:24
          0
          • N Negar_mg
            29 Jun 2021, 08:22

            How can i try it with python 2.7? What should i change in tutorial steps?

            J Online
            J Online
            jsulm
            Lifetime Qt Champion
            wrote on 29 Jun 2021, 08:24 last edited by
            #29

            @Negar_mg You should install Python 2.7

            https://forum.qt.io/topic/113070/qt-code-of-conduct

            1 Reply Last reply
            0
            • N Negar_mg
              29 Jun 2021, 08:22

              How can i try it with python 2.7? What should i change in tutorial steps?

              M Offline
              M Offline
              mrjj
              Lifetime Qt Champion
              wrote on 29 Jun 2021, 08:25 last edited by
              #30

              @Negar_mg

              All steps the same.
              Simply install python 2.7 and see if it then
              sounds happier

              1 Reply Last reply
              0
              • N Offline
                N Offline
                Negar_mg
                wrote on 29 Jun 2021, 09:05 last edited by
                #31

                I installed Python 2.7, checked that it was installed with the python -v command in cmd, then according to this link

                //...........................................................................................

                https://wiki.qt.io/How_to_setup_Qt_and_openCV_on_Windows
                //...........................................................................................
                In cmake, I selected the source and destination, but after clicking the configure button, I encountered these errors:
                //...........................................................................................
                {
                Performing Test HAVE_CXX_WNO_ENUM_COMPARE_SWITCH - Failed
                Could NOT find JNI (missing: JAVA_AWT_LIBRARY JAVA_JVM_LIBRARY JAVA_INCLUDE_PATH JAVA_INCLUDE_PATH2 JAVA_AWT_INCLUDE_PATH)
                VTK is not found. Please set -DVTK_DIR in CMake to VTK build directory, or to VTK install subdirectory with VTKConfig.cmake file
                ADE: Download: v0.1.1f.zip
                Try 1 failed
                CMake Warning at cmake/OpenCVDownload.cmake:202 (message):
                ADE: Download failed: 35;"SSL connect error"

                For details please refer to the download log file:

                C:/Qt/opencv_cv2/opencv/Release/CMakeDownloadLog.txt

                Call Stack (most recent call first):
                modules/gapi/cmake/DownloadADE.cmake:5 (ocv_download)
                modules/gapi/cmake/init.cmake:19 (include)
                cmake/OpenCVModule.cmake:298 (include)
                cmake/OpenCVModule.cmake:361 (_add_modules_1)
                modules/CMakeLists.txt:7 (ocv_glob_modules)

                OpenCV Python: during development append to PYTHONPATH: C:/Qt/opencv_cv2/opencv/Release/python_loader
                Could NOT find PkgConfig (missing: PKG_CONFIG_EXECUTABLE)
                FFMPEG: Download: opencv_videoio_ffmpeg.dll
                Try 1 failed
                CMake Warning at cmake/OpenCVDownload.cmake:202 (message):
                FFMPEG: Download failed: 35;"SSL connect error"

                For details please refer to the download log file:

                C:/Qt/opencv_cv2/opencv/Release/CMakeDownloadLog.txt

                Call Stack (most recent call first):
                3rdparty/ffmpeg/ffmpeg.cmake:20 (ocv_download)
                modules/videoio/cmake/detect_ffmpeg.cmake:14 (download_win_ffmpeg)
                modules/videoio/cmake/init.cmake:7 (include)
                modules/videoio/cmake/init.cmake:18 (add_backend)
                cmake/OpenCVModule.cmake:298 (include)
                cmake/OpenCVModule.cmake:361 (_add_modules_1)
                modules/CMakeLists.txt:7 (ocv_glob_modules)

                FFMPEG: Download: opencv_videoio_ffmpeg_64.dll
                Try 1 failed
                CMake Warning at cmake/OpenCVDownload.cmake:202 (message):
                FFMPEG: Download failed: 35;"SSL connect error"

                For details please refer to the download log file:

                C:/Qt/opencv_cv2/opencv/Release/CMakeDownloadLog.txt

                Call Stack (most recent call first):
                3rdparty/ffmpeg/ffmpeg.cmake:20 (ocv_download)
                modules/videoio/cmake/detect_ffmpeg.cmake:14 (download_win_ffmpeg)
                modules/videoio/cmake/init.cmake:7 (include)
                modules/videoio/cmake/init.cmake:18 (add_backend)
                cmake/OpenCVModule.cmake:298 (include)
                cmake/OpenCVModule.cmake:361 (_add_modules_1)
                modules/CMakeLists.txt:7 (ocv_glob_modules)

                FFMPEG: Download: ffmpeg_version.cmake
                Try 1 failed
                CMake Warning at cmake/OpenCVDownload.cmake:202 (message):
                FFMPEG: Download failed: 35;"SSL connect error"

                For details please refer to the download log file:

                C:/Qt/opencv_cv2/opencv/Release/CMakeDownloadLog.txt

                Call Stack (most recent call first):
                3rdparty/ffmpeg/ffmpeg.cmake:20 (ocv_download)
                modules/videoio/cmake/detect_ffmpeg.cmake:14 (download_win_ffmpeg)
                modules/videoio/cmake/init.cmake:7 (include)
                modules/videoio/cmake/init.cmake:18 (add_backend)
                cmake/OpenCVModule.cmake:298 (include)
                cmake/OpenCVModule.cmake:361 (_add_modules_1)
                modules/CMakeLists.txt:7 (ocv_glob_modules)

                }

                1 Reply Last reply
                0
                • N Offline
                  N Offline
                  Negar_mg
                  wrote on 30 Jun 2021, 04:49 last edited by Negar_mg
                  #32

                  @mrjj ,
                  @SGaist
                  Please Help me ,
                  How can I fix these errors?

                  J 1 Reply Last reply 30 Jun 2021, 04:54
                  0
                  • N Negar_mg
                    30 Jun 2021, 04:49

                    @mrjj ,
                    @SGaist
                    Please Help me ,
                    How can I fix these errors?

                    J Online
                    J Online
                    jsulm
                    Lifetime Qt Champion
                    wrote on 30 Jun 2021, 04:54 last edited by
                    #33

                    @Negar_mg I don't know how. This is an OpenCV issue and has nothing to do with Qt. Please ask in an OpenCV forum.

                    You should at least consider doing what the error output suggests:
                    "For details please refer to the download log file:

                    C:/Qt/opencv_cv2/opencv/Release/CMakeDownloadLog.txt"
                    It looks like it can't download some dependencies.

                    https://forum.qt.io/topic/113070/qt-code-of-conduct

                    1 Reply Last reply
                    0
                    • N Offline
                      N Offline
                      Negar_mg
                      wrote on 30 Jun 2021, 05:57 last edited by
                      #34

                      Yes. I know that it cannot download a link, but i have no idea how to fix it. Could you please give me a hint

                      «Error»
                      {
                      ADE: Download: v0.1.1f.zip
                      Try 1 failed
                      CMake Warning at cmake/OpenCVDownload.cmake:202 (message):
                      ADE: Download failed: 35;"SSL connect error"

                      For details please refer to the download log file:

                      C:/Qt/opencv_cv2/opencv/Release/CMakeDownloadLog.txt

                      Call Stack (most recent call first):
                      modules/gapi/cmake/DownloadADE.cmake:5 (ocv_download)
                      modules/gapi/cmake/init.cmake:19 (include)
                      cmake/OpenCVModule.cmake:298 (include)
                      cmake/OpenCVModule.cmake:361 (_add_modules_1)
                      modules/CMakeLists.txt:7 (ocv_glob_modules)

                      }

                      J 1 Reply Last reply 30 Jun 2021, 11:14
                      0
                      • N Negar_mg
                        30 Jun 2021, 05:57

                        Yes. I know that it cannot download a link, but i have no idea how to fix it. Could you please give me a hint

                        «Error»
                        {
                        ADE: Download: v0.1.1f.zip
                        Try 1 failed
                        CMake Warning at cmake/OpenCVDownload.cmake:202 (message):
                        ADE: Download failed: 35;"SSL connect error"

                        For details please refer to the download log file:

                        C:/Qt/opencv_cv2/opencv/Release/CMakeDownloadLog.txt

                        Call Stack (most recent call first):
                        modules/gapi/cmake/DownloadADE.cmake:5 (ocv_download)
                        modules/gapi/cmake/init.cmake:19 (include)
                        cmake/OpenCVModule.cmake:298 (include)
                        cmake/OpenCVModule.cmake:361 (_add_modules_1)
                        modules/CMakeLists.txt:7 (ocv_glob_modules)

                        }

                        J Online
                        J Online
                        jsulm
                        Lifetime Qt Champion
                        wrote on 30 Jun 2021, 11:14 last edited by
                        #35

                        @Negar_mg I never built OpenCV and this is Qt forum, not OpenCV.

                        https://forum.qt.io/topic/113070/qt-code-of-conduct

                        1 Reply Last reply
                        0
                        • D Offline
                          D Offline
                          daleberlin
                          wrote on 27 Mar 2023, 04:50 last edited by
                          #36

                          @RodMckay said in Error: undefined reference to `cvReleaseImage' (opencv + Qt):

                          I try to write a simple image viewer program by using opencv int Qt5.1
                          the problem is that Qt5.1 shows me the error in runtime , where am I wrong ?
                          .pro
                          @
                          #-------------------------------------------------

                          Project created by QtCreator 2013-09-11T03:55:37

                          #-------------------------------------------------
                          QT += core
                          QT -= gui
                          TARGET = camera_onConsole
                          CONFIG += console
                          CONFIG -= app_bundle
                          TEMPLATE = app
                          INCLUDEPATH += D:\opencv\build\include
                          LIBS += -lopencv_highgui246
                          -lopencv_imgproc246
                          -lopencv_objdetect246
                          SOURCES += main.cpp
                          @
                          .cpp
                          @
                          #include <QCoreApplication>
                          #include "opencv/cv.h"
                          #include "opencv/highgui.h"
                          #include <opencv/cxcore.h>
                          int main(int argc, char argv[])
                          {
                          QCoreApplication a(argc, argv);
                          IplImage
                          img = cvLoadImage("D:/image.jpg");
                          cvNamedWindow( "Example1", CV_WINDOW_AUTOSIZE );
                          cvShowImage("Example1", img);
                          cvWaitKey(0);
                          cvReleaseImage(&img);
                          cvDestroyWindow( "Example1" );
                          return a.exec();

                          }
                          @
                          is there anyone who knows solution of this ? thanks for replies

                          The error in the runtime could be due to various reasons, and it would be helpful if you could provide more information about the specific error message or behavior that you are encountering.

                          However, based on the code that you have provided, there are a few issues that might be causing the problem:

                          The Qt project file (.pro) is missing the inclusion of the "widgets" module, which is required for creating GUI applications. You can add it by modifying the "QT" line in your .pro file to:

                          QT += core widgets

                          The OpenCV library that you are linking to is version 2.4.6, which might not be compatible with the version of Qt that you are using (Qt 5.1). You could try linking to a more recent version of OpenCV (e.g., 4.x), or using an older version of Qt that is compatible with OpenCV 2.4.6.

                          The use of the "IplImage" data type is deprecated in newer versions of OpenCV, and you might encounter compatibility issues when using it with Qt. You could try using the newer "cv::Mat" data type instead, which is recommended for working with images in OpenCV.

                          Here is a modified version of your code that addresses these issues:

                          .pro
                          @
                          #-------------------------------------------------

                          Project created by QtCreator 2013-09-11T03:55:37
                          #-------------------------------------------------

                          QT += core widgets

                          TARGET = camera_onConsole
                          CONFIG += console
                          CONFIG -= app_bundle

                          TEMPLATE = app

                          INCLUDEPATH += D:\opencv\build\include

                          LIBS += -lopencv_highgui
                          -lopencv_imgproc
                          -lopencv_objdetect

                          SOURCES += main.cpp

                          @

                          .cpp
                          @
                          #include <QCoreApplication>
                          #include <opencv2/core.hpp>
                          #include <opencv2/highgui.hpp>

                          int main(int argc, char *argv[])
                          {
                          QCoreApplication a(argc, argv);

                          cv::Mat img = cv::imread("D:/image.jpg");
                          cv::namedWindow("Example1", cv::WINDOW_AUTOSIZE);
                          cv::imshow("Example1", img);
                          cv::waitKey(0);
                          cv::destroyWindow("Example1");
                          
                          return a.exec();
                          
                          

                          }

                          @

                          Note that this code uses the newer "cv::Mat" data type instead of "IplImage", and also uses the updated function names for creating and destroying windows in OpenCV.

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                          0
                          • SGaistS SGaist moved this topic from Qt in Education on 27 Mar 2023, 19:44

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