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lnk2019 with opencv treshold

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  • S Offline
    S Offline
    superdu
    wrote on last edited by
    #7

    i originaly wrote it like that. That didn't work too.

    1 Reply Last reply
    0
    • SGaistS Offline
      SGaistS Offline
      SGaist
      Lifetime Qt Champion
      wrote on last edited by
      #8

      Is it the only symbol that fails the build ?

      Interested in AI ? www.idiap.ch
      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

      1 Reply Last reply
      0
      • S Offline
        S Offline
        superdu
        wrote on last edited by
        #9

        if i use imshow, i have this problem too. but i can use Mat. By the way i use msvc2019 (32 and 64). at the beginning i thought it was the problem. So i tried to compile it with msvc2015 but still the same problem... and i can use this functions on visual studio... the only difference is the IDE so i think i miss something but what...

        1 Reply Last reply
        0
        • SGaistS Offline
          SGaistS Offline
          SGaist
          Lifetime Qt Champion
          wrote on last edited by
          #10

          Just to make sure we are on the same base, can you describe your setup exactly ?
          Which IDE are you using ?
          Which exact compiler are you using ?
          Which compiler was used for OpenCV and for Qt ?

          Interested in AI ? www.idiap.ch
          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

          1 Reply Last reply
          0
          • S Offline
            S Offline
            superdu
            wrote on last edited by
            #11

            for my project i use QtCreator but sometime, juste for test i use visual studio.
            for openCV i used the package manager vcpkg but as that work on my vs i think its compile with msvc2019.
            qt i just used the installer. i let here systems info from QtCreator:

            {noformat}
            Qt 5.15.2 (x86_64-little_endian-llp64 shared (dynamic) release build; by MSVC 2019) on "windows"
            OS: Windows 10 Version 2009 [winnt version 10.0.19042]

            Architecture: x86_64; features: SSE2 SSE3 SSSE3 SSE4.1 SSE4.2 AVX AVX2

            Environment:
            Qt5_DIR="D:\Qt\5.15.2\msvc2019_64"
            QtMsBuild="C:\Users\antoi\AppData\Local\QtMsBuild"

            Features: QT_NO_EXCEPTIONS

            Library info:
            PrefixPath: D:\Qt\Tools\QtCreator\bin
            DocumentationPath: D:\Qt\Tools\QtCreator\bin\doc
            HeadersPath: D:\Qt\Tools\QtCreator\bin\include
            LibrariesPath: D:\Qt\Tools\QtCreator\bin
            LibraryExecutablesPath: D:\Qt\Tools\QtCreator\bin\bin
            BinariesPath: D:\Qt\Tools\QtCreator\bin
            PluginsPath: D:\Qt\Tools\QtCreator\bin\plugins
            ImportsPath: D:\Qt\Tools\QtCreator\bin\imports
            Qml2ImportsPath: D:\Qt\Tools\QtCreator\bin\qml
            ArchDataPath: D:\Qt\Tools\QtCreator\bin
            DataPath: D:\Qt\Tools\QtCreator\bin
            TranslationsPath: D:\Qt\Tools\QtCreator\bin\translations
            ExamplesPath: D:\Qt\Tools\QtCreator\bin\examples
            TestsPath: D:\Qt\Tools\QtCreator\bin\tests
            SettingsPath:

            Standard paths [... denote writable entry]:
            DesktopLocation: "Desktop" C:\Users\antoi\OneDrive\Bureau
            DocumentsLocation: "Documents" C:\Users\antoi\OneDrive\Documents
            FontsLocation: "Fonts" C:\WINDOWS\Fonts
            ApplicationsLocation: "Applications" C:\Users\antoi\AppData\Roaming\Microsoft\Windows\Start Menu\Programs
            MusicLocation: "Music" C:\Users\antoi\Music
            MoviesLocation: "Movies" C:\Users\antoi\Videos
            PicturesLocation: "Pictures" C:\Users\antoi\OneDrive\Images
            TempLocation: "Temporary Directory" C:\Users\antoi\AppData\Local\Temp
            HomeLocation: "Home" C:\Users\antoi
            AppLocalDataLocation: "Application Data" C:\Users\antoi\AppData\Local\QtProject\qtdiag C:\ProgramData\QtProject\qtdiag D:\Qt\Tools\QtCreator\bin D:\Qt\Tools\QtCreator\bin\data D:\Qt\Tools\QtCreator\bin\data\QtProject\qtdiag
            CacheLocation: "Cache" C:\Users\antoi\AppData\Local\QtProject\qtdiag\cache
            GenericDataLocation: "Shared Data" C:\Users\antoi\AppData\Local C:\ProgramData D:\Qt\Tools\QtCreator\bin D:\Qt\Tools\QtCreator\bin\data
            RuntimeLocation: "Runtime" C:\Users\antoi
            ConfigLocation: "Configuration" C:\Users\antoi\AppData\Local\QtProject\qtdiag C:\ProgramData\QtProject\qtdiag D:\Qt\Tools\QtCreator\bin D:\Qt\Tools\QtCreator\bin\data D:\Qt\Tools\QtCreator\bin\data\QtProject\qtdiag
            DownloadLocation: "Download" C:\Users\antoi\Downloads
            GenericCacheLocation: "Shared Cache" C:\Users\antoi\AppData\Local\cache
            GenericConfigLocation: "Shared Configuration" C:\Users\antoi\AppData\Local C:\ProgramData D:\Qt\Tools\QtCreator\bin D:\Qt\Tools\QtCreator\bin\data
            AppDataLocation: "Application Data" C:\Users\antoi\AppData\Roaming\QtProject\qtdiag C:\ProgramData\QtProject\qtdiag D:\Qt\Tools\QtCreator\bin D:\Qt\Tools\QtCreator\bin\data D:\Qt\Tools\QtCreator\bin\data\QtProject\qtdiag
            AppConfigLocation: "Application Configuration" C:\Users\antoi\AppData\Local\QtProject\qtdiag C:\ProgramData\QtProject\qtdiag D:\Qt\Tools\QtCreator\bin D:\Qt\Tools\QtCreator\bin\data D:\Qt\Tools\QtCreator\bin\data\QtProject\qtdiag

            File selectors (increasing order of precedence):
            fr_FR windows winnt

            Network:
            Using "OpenSSL 1.1.1d 10 Sep 2019", version: 0x1010104f

            Platform capabilities: ThreadedPixmaps OpenGL ThreadedOpenGL WindowMasks MultipleWindows ForeignWindows NonFullScreenWindows NativeWidgets WindowManagement RasterGLSurface AllGLFunctionsQueryable

            Style hints:
            mouseDoubleClickInterval: 500
            mousePressAndHoldInterval: 800
            startDragDistance: 10
            startDragTime: 500
            startDragVelocity: 0
            keyboardInputInterval: 400
            keyboardAutoRepeatRate: 32
            cursorFlashTime: 1060
            showIsFullScreen: 0
            showIsMaximized: 0
            passwordMaskDelay: 0
            passwordMaskCharacter: U+25CF
            fontSmoothingGamma: 1
            useRtlExtensions: 0
            setFocusOnTouchRelease: 0
            tabFocusBehavior: Qt::TabFocusAllControls
            singleClickActivation: 0

            Additional style hints (QPlatformIntegration):
            ReplayMousePressOutsidePopup: 1

            Theme:
            Platforms requested : windows
            available : snap,flatpak,xdgdesktopportal
            Styles requested : WindowsVista,Windows
            available : windowsvista,Windows,Fusion
            System font : "MS Shell Dlg 2" 8
            Native file dialog

            Fonts:
            General font : "MS Shell Dlg 2" 8
            Fixed font : "Courier New" 9
            Title font : "MS Shell Dlg 2" 8
            Smallest font: "MS Shell Dlg 2" 8

            Palette:
            QPalette::WindowText: #ff000000
            QPalette::Button: #fff0f0f0
            QPalette::Light: #ffffffff
            QPalette::Midlight: #ffe3e3e3
            QPalette::Dark: #ffa0a0a0
            QPalette::Mid: #ffa0a0a0
            QPalette::Text: #ff000000
            QPalette::BrightText: #ffffffff
            QPalette::ButtonText: #ff000000
            QPalette::Base: #ffffffff
            QPalette::Window: #fff0f0f0
            QPalette::Shadow: #ff696969
            QPalette::Highlight: #ff0078d7
            QPalette::HighlightedText: #ffffffff
            QPalette::Link: #ff0000ff
            QPalette::LinkVisited: #ffff00ff
            QPalette::AlternateBase: #ffe9e7e3
            QPalette::NoRole: #ff000000
            QPalette::ToolTipBase: #ffffffdc
            QPalette::ToolTipText: #ff000000
            QPalette::PlaceholderText: #80000000

            Screens: 1, High DPI scaling: inactive

            0 "\.\DISPLAY1" Depth: 32 Primary: yes

            Manufacturer:
            Model:
            Serial number:
            Geometry: 1920x1080+0+0 Available: 1920x1040+0+0
            Physical size: 382x215 mm Refresh: 144 Hz Power state: 0
            Physical DPI: 127.665,127.591 Logical DPI: 96,96 Subpixel_None
            DevicePixelRatio: 1 Pixel density: 1
            Primary orientation: 2 Orientation: 2 Native orientation: 0 OrientationUpdateMask: 0

            Dynamic GL LibGL Vendor: NVIDIA Corporation
            Renderer: NVIDIA GeForce RTX 2060/PCIe/SSE2
            Version: 4.6.0 NVIDIA 466.63
            Shading language: 4.60 NVIDIA
            Format: Version: 4.6 Profile: 2 Swap behavior: 2 Buffer size (RGBA): 8,8,8,8 Depth buffer: 24 Stencil buffer: 8
            Profile: None (QOpenGLFunctions_4_6)

            Vulkan instance available
            Supported instance extensions:
            VK_KHR_device_group_creation, version 1
            VK_KHR_display, version 23
            VK_KHR_external_fence_capabilities, version 1
            VK_KHR_external_memory_capabilities, version 1
            VK_KHR_external_semaphore_capabilities, version 1
            VK_KHR_get_display_properties2, version 1
            VK_KHR_get_physical_device_properties2, version 2
            VK_KHR_get_surface_capabilities2, version 1
            VK_KHR_surface, version 25
            VK_KHR_surface_protected_capabilities, version 1
            VK_KHR_win32_surface, version 6
            VK_EXT_debug_report, version 9
            VK_EXT_debug_utils, version 2
            VK_EXT_swapchain_colorspace, version 4
            VK_NV_external_memory_capabilities, version 1
            Supported layers:
            VK_LAYER_NV_optimus, version 1, spec version 1.2.168, NVIDIA Optimus layer
            VK_LAYER_VALVE_steam_overlay, version 1, spec version 1.2.136, Steam Overlay Layer
            VK_LAYER_VALVE_steam_fossilize, version 1, spec version 1.2.136, Steam Pipeline Caching Layer
            VK_LAYER_EOS_Overlay, version 1, spec version 1.2.136, Vulkan overlay layer for Epic Online Services
            VK_LAYER_EOS_Overlay, version 1, spec version 1.2.136, Vulkan overlay layer for Epic Online Services
            Available physical devices:
            API version 1.2.168, vendor 0x10DE, device 0x1F11, NVIDIA GeForce RTX 2060, type 2, driver version 466.252.0

            GPU #1:
            Card name : NVIDIA GeForce RTX 2060
            Driver Name : nvldumdx.dll
            Driver Version : 27.21.14.6663
            Vendor ID : 0x10DE
            Device ID : 0x1F11
            SubSys ID : 0x3FFD17AA
            Revision ID : 0x00A1

            Qt Rendering Hardware Interface supported backends:
            OpenGL (with default QSurfaceFormat):
            Min Texture Size: 1
            Max Texture Size: 32768
            Max Color Attachments: 8
            Frames in Flight: 1
            Uniform Buffer Alignment: 1
            Supported MSAA sample counts: 1,2,4,8,16,32
            Features:
            - MultisampleTexture
            v MultisampleRenderBuffer
            - DebugMarkers
            - Timestamps
            v Instancing
            - CustomInstanceStepRate
            v PrimitiveRestart
            v NonDynamicUniformBuffers
            v NonFourAlignedEffectiveIndexBufferOffset
            v NPOTTextureRepeat
            - RedOrAlpha8IsRed
            v ElementIndexUint
            v Compute
            v WideLines
            v VertexShaderPointSize
            v BaseVertex
            - BaseInstance
            v TriangleFanTopology
            v ReadBackNonUniformBuffer
            v ReadBackNonBaseMipLevel
            Texture formats: RGBA8 BGRA8 R8 R16 RED_OR_ALPHA8 RGBA16F RGBA32F R16F R32F D16 D32F BC1 BC2 BC3 ETC2_RGB8 ETC2_RGB8A1 ETC2_RGBA8 ASTC_4x4 ASTC_5x4 ASTC_5x5 ASTC_6x5 ASTC_6x6 ASTC_8x5 ASTC_8x6 ASTC_8x8 ASTC_10x5 ASTC_10x6 ASTC_10x8 ASTC_10x10 ASTC_12x10 ASTC_12x12
            Vulkan:
            Min Texture Size: 1
            Max Texture Size: 32768
            Max Color Attachments: 8
            Frames in Flight: 2
            Uniform Buffer Alignment: 64
            Supported MSAA sample counts: 1,2,4,8
            Features:
            v MultisampleTexture
            v MultisampleRenderBuffer
            - DebugMarkers
            v Timestamps
            v Instancing
            - CustomInstanceStepRate
            v PrimitiveRestart
            v NonDynamicUniformBuffers
            v NonFourAlignedEffectiveIndexBufferOffset
            v NPOTTextureRepeat
            v RedOrAlpha8IsRed
            v ElementIndexUint
            v Compute
            v WideLines
            v VertexShaderPointSize
            v BaseVertex
            v BaseInstance
            v TriangleFanTopology
            v ReadBackNonUniformBuffer
            v ReadBackNonBaseMipLevel
            Texture formats: RGBA8 BGRA8 R8 R16 RED_OR_ALPHA8 RGBA16F RGBA32F R16F R32F D16 D32F BC1 BC2 BC3 BC4 BC5 BC6H BC7
            Direct3D 11:
            Min Texture Size: 1
            Max Texture Size: 16384
            Max Color Attachments: 8
            Frames in Flight: 1
            Uniform Buffer Alignment: 256
            Supported MSAA sample counts: 1,2,4,8
            Features:
            v MultisampleTexture
            v MultisampleRenderBuffer
            v DebugMarkers
            v Timestamps
            v Instancing
            v CustomInstanceStepRate
            v PrimitiveRestart
            - NonDynamicUniformBuffers
            v NonFourAlignedEffectiveIndexBufferOffset
            v NPOTTextureRepeat
            v RedOrAlpha8IsRed
            v ElementIndexUint
            v Compute
            - WideLines
            - VertexShaderPointSize
            v BaseVertex
            v BaseInstance
            - TriangleFanTopology
            v ReadBackNonUniformBuffer
            v ReadBackNonBaseMipLevel
            Texture formats: RGBA8 BGRA8 R8 R16 RED_OR_ALPHA8 RGBA16F RGBA32F R16F R32F D16 D32F BC1 BC2 BC3 BC4 BC5 BC6H BC7

            Plugin information:

            • Android 4.15.0
            • AutoTest 4.15.0
              AutotoolsProjectManager 4.15.0
              BareMetal 4.15.0
            • Bazaar 4.15.0
              Beautifier 4.15.0
            • BinEditor 4.15.0
            • Bookmarks 4.15.0
              Boot2Qt 4.15.0
            • CMakeProjectManager 4.15.0
            • CVS 4.15.0
            • ClangCodeModel 4.15.0
              ClangFormat 4.15.0
            • ClangTools 4.15.0
            • ClassView 4.15.0
              ClearCase 4.15.0
            • CodePaster 4.15.0
              CompilationDatabaseProjectManager 4.15.0
              Conan 4.15.0
            • Core 4.15.0
            • CppEditor 4.15.0
            • CppTools 4.15.0
              Cppcheck 4.15.0
            • CtfVisualizer 4.15.0
            • Debugger 4.15.0
            • Designer 4.15.0
            • DiffEditor 4.15.0
              EmacsKeys 4.15.0
            • FakeVim 4.15.0
            • GLSLEditor 4.15.0
            • GenericProjectManager 4.15.0
            • Git 4.15.0
              HelloWorld 4.15.0
            • Help 4.15.0
            • ImageViewer 4.15.0
            • IncrediBuild 4.15.0
              Ios 4.15.0
            • LanguageClient 4.15.0
            • Macros 4.15.0
            • Marketplace 4.15.0
              McuSupport 4.15.0
            • Mercurial 4.15.0
              MesonProjectManager 4.15.0
            • ModelEditor 4.15.0
              Nim 4.15.0
            • PerfProfiler 4.15.0
              Perforce 4.15.0
            • ProjectExplorer 4.15.0
            • Python 4.15.0
            • QbsProjectManager 4.15.0
            • QmakeProjectManager 4.15.0
            • QmlDesigner 4.15.0
            • QmlJSEditor 4.15.0
            • QmlJSTools 4.15.0
            • QmlPreview 4.15.0
            • QmlProfiler 4.15.0
            • QmlProjectManager 4.15.0
            • Qnx 4.15.0
            • QtSupport 4.15.0
            • RemoteLinux 4.15.0
            • ResourceEditor 4.15.0
            • ScxmlEditor 4.15.0
              SerialTerminal 4.15.0
              SilverSearcher 4.15.0
              StudioWelcome 4.15.0
            • Subversion 4.15.0
            • TaskList 4.15.0
            • TextEditor 4.15.0
              Todo 4.15.0
            • UpdateInfo 4.15.0
            • Valgrind 4.15.0
            • VcsBase 4.15.0
            • WebAssembly 4.15.0
            • Welcome 4.15.0
            • WinRt 4.15.0

            Qt Creator 4.15.0
            Basé sur Qt 5.15.2 (MSVC 2019, 64 bit)
            From revision 978f6caf1e
            Built on May 4 2021 01:16:56

            {noformat}

            1 Reply Last reply
            0
            • SGaistS Offline
              SGaistS Offline
              SGaist
              Lifetime Qt Champion
              wrote on last edited by
              #12

              Ok... nothing stands out as wrong.

              Can you start from a default Qt project and just one OpenCV method there ?

              It might be easier to debug your issue.

              Interested in AI ? www.idiap.ch
              Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

              1 Reply Last reply
              0
              • S Offline
                S Offline
                superdu
                wrote on last edited by superdu
                #13

                ok so here the code (thank you for your time by the way):

                cpp

                #include "mainwindow.h"
                #include "ui_mainwindow.h"
                
                MainWindow::MainWindow(QWidget *parent)
                    : QMainWindow(parent)
                    , ui(new Ui::MainWindow)
                {
                    ui->setupUi(this);
                    Mat new_img = Mat::zeros(25, 25, CV_16U);
                    Mat dest;
                
                    threshold(new_img,dest,200,255,THRESH_BINARY | THRESH_OTSU);
                
                }
                
                MainWindow::~MainWindow()
                {
                    delete ui;
                }
                
                
                

                header

                #ifndef MAINWINDOW_H
                #define MAINWINDOW_H
                
                #include <QMainWindow>
                #include <opencv2/core.hpp>
                #include <opencv2/highgui.hpp>
                #include <opencv2/imgcodecs.hpp>
                #include <opencv2/opencv.hpp>
                #include "opencv2/imgproc.hpp"
                
                using namespace cv;
                
                QT_BEGIN_NAMESPACE
                namespace Ui { class MainWindow; }
                QT_END_NAMESPACE
                
                class MainWindow : public QMainWindow
                {
                    Q_OBJECT
                
                public:
                    MainWindow(QWidget *parent = nullptr);
                    ~MainWindow();
                
                private:
                    Ui::MainWindow *ui;
                };
                #endif // MAINWINDOW_H
                
                

                pro

                QT       += core gui
                
                greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
                
                CONFIG += c++11
                
                # You can make your code fail to compile if it uses deprecated APIs.
                # In order to do so, uncomment the following line.
                #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
                
                SOURCES += \
                    main.cpp \
                    mainwindow.cpp
                
                HEADERS += \
                    mainwindow.h
                
                FORMS += \
                    mainwindow.ui
                
                INCLUDEPATH += C:/src/vcpkg/vcpkg/packages/opencv4_x64-windows/include
                
                LIBS += C:/src/vcpkg/vcpkg/packages/opencv4_x64-windows/lib/opencv_calib3d.lib
                LIBS += C:/src/vcpkg/vcpkg/packages/opencv4_x64-windows/lib/opencv_core.lib
                LIBS += C:/src/vcpkg/vcpkg/packages/opencv4_x64-windows/lib/opencv_dnn.lib
                LIBS += C:/src/vcpkg/vcpkg/packages/opencv4_x64-windows/lib/opencv_features2d.lib
                LIBS += C:/src/vcpkg/vcpkg/packages/opencv4_x64-windows/lib/opencv_flann.lib
                LIBS += C:/src/vcpkg/vcpkg/packages/opencv4_x64-windows/lib/opencv_highgui.lib
                LIBS += C:/src/vcpkg/vcpkg/packages/opencv4_x64-windows/lib/opencv_imgcodecs.lib
                LIBS += C:/src/vcpkg/vcpkg/packages/opencv4_x64-windows/lib/opencv_imgproc.lib
                LIBS += C:/src/vcpkg/vcpkg/packages/opencv4_x64-windows/lib/opencv_ml.lib
                LIBS += C:/src/vcpkg/vcpkg/packages/opencv4_x64-windows/lib/opencv_objdetect.lib
                LIBS += C:/src/vcpkg/vcpkg/packages/opencv4_x64-windows/lib/opencv_photo.lib
                LIBS += C:/src/vcpkg/vcpkg/packages/opencv4_x64-windows/lib/opencv_stitching.lib
                LIBS += C:/src/vcpkg/vcpkg/packages/opencv4_x64-windows/lib/opencv_video.lib
                LIBS += C:/src/vcpkg/vcpkg/packages/opencv4_x64-windows/lib/opencv_videoio.lib
                
                
                TRANSLATIONS += \
                    test_fr_FR.ts
                CONFIG += lrelease
                CONFIG += embed_translations
                
                # Default rules for deployment.
                qnx: target.path = /tmp/$${TARGET}/bin
                else: unix:!android: target.path = /opt/$${TARGET}/bin
                !isEmpty(target.path): INSTALLS += target
                
                

                the code reproduce the problem for me:

                mainwindow.obj:-1: erreur : LNK2019: symbole externe non r‚solu "double __cdecl cv::threshold(class cv::debug_build_guard::_InputArray const &,class cv::debug_build_guard::_OutputArray const &,double,double,int)" (?threshold@cv@@YANAEBV_InputArray@debug_build_guard@1@AEBV_OutputArray@31@NNH@Z) r‚f‚renc‚ dans la fonction "public: __cdecl MainWindow::MainWindow(class QWidget *)" (??0MainWindow@@QEAA@PEAVQWidget@@@Z)

                1 Reply Last reply
                0
                • SGaistS Offline
                  SGaistS Offline
                  SGaist
                  Lifetime Qt Champion
                  wrote on last edited by
                  #14

                  Does the build output show that the libraries are currently linked ?

                  By the way, you should move all your includes to the .cpp file. There's nothing in the header that uses OpenCV.

                  Interested in AI ? www.idiap.ch
                  Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                  1 Reply Last reply
                  1
                  • S Offline
                    S Offline
                    superdu
                    wrote on last edited by
                    #15

                    here the compile output:

                    21:18:53: Running steps for project test...
                    21:18:53: Configuration unchanged, skipping qmake step.
                    21:18:53: Starting: "D:\Qt\Tools\QtCreator\bin\jom.exe"
                    D:\Qt\Tools\QtCreator\bin\jom.exe -f Makefile.Debug
                    link /NOLOGO /DYNAMICBASE /NXCOMPAT /DEBUG /SUBSYSTEM:WINDOWS "/MANIFESTDEPENDENCY:type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' publicKeyToken='6595b64144ccf1df' language='' processorArchitecture=''" /MANIFEST:embed /OUT:debug\test.exe @C:\Users\antoi\AppData\Local\Temp\test.exe.16732.0.jom
                    mainwindow.obj : error LNK2019: unresolved external symbol "double __cdecl cv::threshold(class cv::debug_build_guard::_InputArray const &,class cv::debug_build_guard::_OutputArray const &,double,double,int)" (?threshold@cv@@YANAEBV_InputArray@debug_build_guard@1@AEBV_OutputArray@31@NNH@Z) referenced in function "public: __cdecl MainWindow::MainWindow(class QWidget *)" (??0MainWindow@@QEAA@PEAVQWidget@@@Z)
                    debug\test.exe : fatal error LNK1120: 1 unresolved externals
                    jom: C:\Users\antoi\OneDrive\Documents\QTtest\build-test-Desktop_Qt_5_15_2_MSVC2019_64bit-Debug\Makefile.Debug [debug\test.exe] Error 1120
                    jom: C:\Users\antoi\OneDrive\Documents\QTtest\build-test-Desktop_Qt_5_15_2_MSVC2019_64bit-Debug\Makefile [debug] Error 2
                    21:18:53: The process "D:\Qt\Tools\QtCreator\bin\jom.exe" exited with code 2.
                    Error while building/deploying project test (kit: Desktop Qt 5.15.2 MSVC2019 64bit)
                    When executing step "Make"
                    21:18:53: Elapsed time: 00:00.

                    1 Reply Last reply
                    0
                    • SGaistS Offline
                      SGaistS Offline
                      SGaist
                      Lifetime Qt Champion
                      wrote on last edited by
                      #16

                      Ok... does the Makefile contain any references to OpenCV ?

                      Interested in AI ? www.idiap.ch
                      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                      1 Reply Last reply
                      0
                      • S Offline
                        S Offline
                        superdu
                        wrote on last edited by
                        #17

                        no indeed... they are no reference to opencv:

                        #############################################################################

                        Makefile for building: test

                        Generated by qmake (3.1) (Qt 5.15.2)

                        Project: ..\test\test.pro

                        Template: app

                        Command: D:\Qt\5.15.2\msvc2019_64\bin\qmake.exe -o Makefile ..\test\test.pro -spec win32-msvc "CONFIG+=debug" "CONFIG+=qml_debug"

                        #############################################################################

                        MAKEFILE = Makefile

                        EQ = =

                        first: debug
                        install: debug-install
                        uninstall: debug-uninstall
                        QMAKE = D:\Qt\5.15.2\msvc2019_64\bin\qmake.exe
                        DEL_FILE = del
                        CHK_DIR_EXISTS= if not exist
                        MKDIR = mkdir
                        COPY = copy /y
                        COPY_FILE = copy /y
                        COPY_DIR = xcopy /s /q /y /i
                        INSTALL_FILE = copy /y
                        INSTALL_PROGRAM = copy /y
                        INSTALL_DIR = xcopy /s /q /y /i
                        QINSTALL = D:\Qt\5.15.2\msvc2019_64\bin\qmake.exe -install qinstall
                        QINSTALL_PROGRAM = D:\Qt\5.15.2\msvc2019_64\bin\qmake.exe -install qinstall -exe
                        DEL_FILE = del
                        SYMLINK = $(QMAKE) -install ln -f -s
                        DEL_DIR = rmdir
                        MOVE = move
                        IDC = idc
                        IDL = midl
                        ZIP = zip -r -9
                        DEF_FILE =
                        RES_FILE =
                        SED = $(QMAKE) -install sed
                        MOVE = move
                        SUBTARGETS =
                        debug
                        release

                        debug: $(MAKEFILE) FORCE
                        @set MAKEFLAGS=$(MAKEFLAGS)
                        $(MAKE) -f $(MAKEFILE).Debug
                        debug-make_first: FORCE
                        @set MAKEFLAGS=$(MAKEFLAGS)
                        $(MAKE) -f $(MAKEFILE).Debug
                        debug-all: FORCE
                        @set MAKEFLAGS=$(MAKEFLAGS)
                        $(MAKE) -f $(MAKEFILE).Debug all
                        debug-clean: FORCE
                        @set MAKEFLAGS=$(MAKEFLAGS)
                        $(MAKE) -f $(MAKEFILE).Debug clean
                        debug-distclean: FORCE
                        @set MAKEFLAGS=$(MAKEFLAGS)
                        $(MAKE) -f $(MAKEFILE).Debug distclean
                        debug-install: FORCE
                        @set MAKEFLAGS=$(MAKEFLAGS)
                        $(MAKE) -f $(MAKEFILE).Debug install
                        debug-uninstall: FORCE
                        @set MAKEFLAGS=$(MAKEFLAGS)
                        $(MAKE) -f $(MAKEFILE).Debug uninstall
                        release: $(MAKEFILE) FORCE
                        @set MAKEFLAGS=$(MAKEFLAGS)
                        $(MAKE) -f $(MAKEFILE).Release
                        release-make_first: FORCE
                        @set MAKEFLAGS=$(MAKEFLAGS)
                        $(MAKE) -f $(MAKEFILE).Release
                        release-all: FORCE
                        @set MAKEFLAGS=$(MAKEFLAGS)
                        $(MAKE) -f $(MAKEFILE).Release all
                        release-clean: FORCE
                        @set MAKEFLAGS=$(MAKEFLAGS)
                        $(MAKE) -f $(MAKEFILE).Release clean
                        release-distclean: FORCE
                        @set MAKEFLAGS=$(MAKEFLAGS)
                        $(MAKE) -f $(MAKEFILE).Release distclean
                        release-install: FORCE
                        @set MAKEFLAGS=$(MAKEFLAGS)
                        $(MAKE) -f $(MAKEFILE).Release install
                        release-uninstall: FORCE
                        @set MAKEFLAGS=$(MAKEFLAGS)
                        $(MAKE) -f $(MAKEFILE).Release uninstall

                        Makefile: ..\test\test.pro D:\Qt\5.15.2\msvc2019_64\mkspecs\win32-msvc\qmake.conf D:\Qt\5.15.2\msvc2019_64\mkspecs\features\spec_pre.prf
                        ...
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_3dcore_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_3dextras.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_3dextras_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_3dinput.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_3dinput_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_3dlogic.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_3dlogic_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_3dquick.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_3dquick_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_3dquickanimation.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_3dquickanimation_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_3dquickextras.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_3dquickextras_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_3dquickinput.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_3dquickinput_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_3dquickrender.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_3dquickrender_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_3dquickscene2d.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_3dquickscene2d_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_3drender.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_3drender_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_accessibility_support_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_axbase.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_axbase_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_axcontainer.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_axcontainer_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_axserver.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_axserver_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_bluetooth.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_bluetooth_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_bodymovin_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_bootstrap_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_charts.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_charts_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_concurrent.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_concurrent_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_core.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_core_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_datavisualization.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_datavisualization_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_dbus.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_dbus_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_designer.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_designer_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_designercomponents_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_devicediscovery_support_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_edid_support_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_egl_support_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_eventdispatcher_support_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_fb_support_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_fontdatabase_support_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_gamepad.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_gamepad_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_gui.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_gui_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_help.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_help_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_location.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_location_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_multimedia.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_multimedia_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_multimediawidgets.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_multimediawidgets_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_network.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_network_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_networkauth.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_networkauth_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_nfc.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_nfc_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_opengl.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_opengl_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_openglextensions.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_openglextensions_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_packetprotocol_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_platformcompositor_support_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_positioning.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_positioning_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_positioningquick.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_positioningquick_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_printsupport.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_printsupport_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_purchasing.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_purchasing_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_qml.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_qml_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_qmldebug_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_qmldevtools_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_qmlmodels.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_qmlmodels_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_qmltest.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_qmltest_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_qmlworkerscript.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_qmlworkerscript_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_qtmultimediaquicktools_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_quick.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_quick3d.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_quick3d_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_quick3dassetimport.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_quick3dassetimport_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_quick3drender.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_quick3drender_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_quick3druntimerender.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_quick3druntimerender_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_quick3dutils.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_quick3dutils_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_quick_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_quickcontrols2.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_quickcontrols2_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_quickparticles_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_quickshapes_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_quicktemplates2.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_quicktemplates2_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_quickwidgets.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_quickwidgets_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_remoteobjects.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_remoteobjects_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_repparser.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_repparser_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_script.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_script_private.pri
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_scripttools.pri
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                        D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_zlib_private.pri
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                        D:\Qt\5.15.2\msvc2019_64\mkspecs\features\exclusive_builds.prf
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\common\msvc-version.conf
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\features\toolchain.prf
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\features\default_pre.prf
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                        D:\Qt\5.15.2\msvc2019_64\mkspecs\features\resolve_config.prf
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\features\exclusive_builds_post.prf
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\features\default_post.prf
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\features\lrelease.prf
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\features\qml_debug.prf
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\features\precompile_header.prf
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\features\warn_on.prf
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\features\qt.prf
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\features\resources_functions.prf
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\features\resources.prf
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\features\moc.prf
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\features\win32\opengl.prf
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\features\uic.prf
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\features\qmake_use.prf
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\features\file_copies.prf
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\features\win32\windows.prf
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\features\testcase_targets.prf
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                        D:\Qt\5.15.2\msvc2019_64\mkspecs\features\yacc.prf
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\features\lex.prf
                        ..\test\test.pro
                        D:\Qt\5.15.2\msvc2019_64\lib\Qt5Widgets.prl
                        D:\Qt\5.15.2\msvc2019_64\lib\Qt5Gui.prl
                        D:\Qt\5.15.2\msvc2019_64\lib\Qt5Core.prl
                        D:\Qt\5.15.2\msvc2019_64\lib\qtmain.prl
                        .qmake.stash
                        D:\Qt\5.15.2\msvc2019_64\mkspecs\features\build_pass.prf
                        debug\qmake_qmake_qm_files.qrc
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                        distclean: debug-distclean release-distclean FORCE
                        -$(DEL_FILE) Makefile
                        -$(DEL_FILE) .qmake.stash test.pdb

                        debug-mocclean:
                        @set MAKEFLAGS=$(MAKEFLAGS)
                        $(MAKE) -f $(MAKEFILE).Debug mocclean
                        release-mocclean:
                        @set MAKEFLAGS=$(MAKEFLAGS)
                        $(MAKE) -f $(MAKEFILE).Release mocclean
                        mocclean: debug-mocclean release-mocclean

                        debug-mocables:
                        @set MAKEFLAGS=$(MAKEFLAGS)
                        $(MAKE) -f $(MAKEFILE).Debug mocables
                        release-mocables:
                        @set MAKEFLAGS=$(MAKEFLAGS)
                        $(MAKE) -f $(MAKEFILE).Release mocables
                        mocables: debug-mocables release-mocables

                        check: first

                        benchmark: first
                        FORCE:

                        $(MAKEFILE).Debug: Makefile
                        $(MAKEFILE).Release: Makefile

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                        • SGaistS Offline
                          SGaistS Offline
                          SGaist
                          Lifetime Qt Champion
                          wrote on last edited by
                          #18

                          You are missing the "-l" in your LIBS lines.

                          Interested in AI ? www.idiap.ch
                          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                          • S Offline
                            S Offline
                            superdu
                            wrote on last edited by
                            #19

                            hum, but they are presents in makefile.debug

                            i also try again this notation but still the same problem

                            LIBS += -L"C:/src/vcpkg/vcpkg/packages/opencv4_x64-windows/lib" -lopencv_calib3d
                            LIBS += -L"C:/src/vcpkg/vcpkg/packages/opencv4_x64-windows/lib" -lopencv_core
                            LIBS += -L"C:/src/vcpkg/vcpkg/packages/opencv4_x64-windows/lib" -lopencv_dnn
                            LIBS += -L"C:/src/vcpkg/vcpkg/packages/opencv4_x64-windows/lib" -lopencv_features2d
                            LIBS += -L"C:/src/vcpkg/vcpkg/packages/opencv4_x64-windows/lib" -lopencv_flann
                            LIBS += -L"C:/src/vcpkg/vcpkg/packages/opencv4_x64-windows/lib" -lopencv_highgui
                            LIBS += -L"C:/src/vcpkg/vcpkg/packages/opencv4_x64-windows/lib" -lopencv_imgcodecs
                            LIBS += -L"C:/src/vcpkg/vcpkg/packages/opencv4_x64-windows/lib" -lopencv_imgproc
                            LIBS += -L"C:/src/vcpkg/vcpkg/packages/opencv4_x64-windows/lib" -lopencv_ml
                            LIBS += -L"C:/src/vcpkg/vcpkg/packages/opencv4_x64-windows/lib" -lopencv_objdetect
                            LIBS += -L"C:/src/vcpkg/vcpkg/packages/opencv4_x64-windows/lib" -lopencv_photo
                            LIBS += -L"C:/src/vcpkg/vcpkg/packages/opencv4_x64-windows/lib" -lopencv_stitching
                            LIBS += -L"C:/src/vcpkg/vcpkg/packages/opencv4_x64-windows/lib" -lopencv_video
                            LIBS += -L"C:/src/vcpkg/vcpkg/packages/opencv4_x64-windows/lib" -lopencv_videoio
                            
                            
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                            • SGaistS Offline
                              SGaistS Offline
                              SGaist
                              Lifetime Qt Champion
                              wrote on last edited by
                              #20

                              So if you build in debug mode it works ?

                              Interested in AI ? www.idiap.ch
                              Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                              • S Offline
                                S Offline
                                superdu
                                wrote on last edited by
                                #21

                                no... i dont know why but i feel if we find the problem that will be something really stupid. and if not i will just try to compile by hand opencv but that should work like that

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                                • SGaistS Offline
                                  SGaistS Offline
                                  SGaist
                                  Lifetime Qt Champion
                                  wrote on last edited by
                                  #22

                                  Are these static or dynamic librairies ?

                                  In any case, what I would do is simplify things with the LIBS part to only link to opencv_core and only use symbols from that library in the sample application.

                                  This will restrict the scope of the issue.

                                  Interested in AI ? www.idiap.ch
                                  Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                                  • S Offline
                                    S Offline
                                    superdu
                                    wrote on last edited by
                                    #23

                                    i just checked it with lib.exe and libs file containes dll. its dynamics library

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                                    • S Offline
                                      S Offline
                                      superdu
                                      wrote on last edited by
                                      #24

                                      ok so i compile by hand opencv following this step: https://wiki.qt.io/How_to_setup_Qt_and_openCV_on_Windows_with_MSVC2017#Building_OpenCV

                                      the two difference is i use msvc 2019 and opencv 4.5.1.

                                      compilation seems to be a succes but when i try to us it in qt the application crash without any information

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                                      • SGaistS Offline
                                        SGaistS Offline
                                        SGaist
                                        Lifetime Qt Champion
                                        wrote on last edited by
                                        #25

                                        If there's a crash then it likely is that the dlls are not found at run time. Go to the Run part of the Project panel and update the PATH environment variable there so that the folder containing the OpenCV dlls are found.

                                        Interested in AI ? www.idiap.ch
                                        Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                                        • S Offline
                                          S Offline
                                          superdu
                                          wrote on last edited by
                                          #26

                                          Ok my bad. i already added to path but i didnt restart my computer. i just restart it and that work well.

                                          result: no more problem and treshold function work. thank you so much for your time!

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