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lnk2019 with opencv treshold

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  • SGaistS Offline
    SGaistS Offline
    SGaist
    Lifetime Qt Champion
    wrote on last edited by
    #4

    Hi,

    Might be a silly question but are you also using a 64 bit build of 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
      #5

      yes yes i use 64bit qt version

      1 Reply Last reply
      0
      • SGaistS Offline
        SGaistS Offline
        SGaist
        Lifetime Qt Champion
        wrote on last edited by SGaist
        #6

        @superdu said in lnk2019 with opencv treshold:

        LIBS += "C:/src/vcpkg/vcpkg/packages/opencv4_x64-windows/lib/opencv_calib3d.lib"

        Usually it's rather written as:

        LIBS += -L"C:/src/vcpkg/vcpkg/packages/opencv4_x64-windows/lib/" -lopencv_calib3d
        

        Can you test that ?

        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
          #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

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            • 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...

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              • 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

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                • 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
                              ...
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                              D:\Qt\5.15.2\msvc2019_64\mkspecs\modules\qt_lib_3dinput.pri
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                              D:\Qt\5.15.2\msvc2019_64\mkspecs\features\win32\default_pre.prf:
                              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:
                              D:\Qt\5.15.2\msvc2019_64\mkspecs\features\exceptions.prf:
                              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:
                              D:\Qt\5.15.2\msvc2019_64\lib\Qt5Widgetsd.prl:
                              D:\Qt\5.15.2\msvc2019_64\lib\Qt5Guid.prl:
                              D:\Qt\5.15.2\msvc2019_64\lib\Qt5Cored.prl:
                              D:\Qt\5.15.2\msvc2019_64\lib\qtmaind.prl:
                              release\qmake_qmake_qm_files.qrc:
                              qmake: FORCE
                              @$(QMAKE) -o Makefile ..\test\test.pro -spec win32-msvc "CONFIG+=debug" "CONFIG+=qml_debug"

                              qmake_all: FORCE

                              make_first: debug-make_first release-make_first FORCE
                              all: debug-all release-all FORCE
                              clean: debug-clean release-clean FORCE
                              -$(DEL_FILE) test.vc.pdb
                              -$(DEL_FILE) test.ilk
                              -$(DEL_FILE) test.idb
                              distclean: debug-distclean release-distclean FORCE
                              -$(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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