Qt5.12与Opencv4.5环境搭建及配置（MinGW）笔记
Qt5.12与Opencv4.5环境搭建及配置（MinGW）笔记
Qt5.12下载及安装
从QT官网上下载qt-opensource-windows-x86-5.12.8版本,地址https://www.qt.io/
安装时注意勾选以下组件：
-
Qt-Qt5.12-MingGW 5.12.8 64 bit
-
Qt-Tools-MinGW 5.12.8
安装完成，配置Qt,打开QtCreator,在工具-选项-Kits-构建套件，选中Desktop Qt 5.12.8 MinGW,设置为默认
在系统变量 Path中为MinGw添加环境变量（Qt安装目录下）
-
C:\Qt\Qt5.12.8\5.12.8\mingw73_64\bin
-
C:\Qt\Qt5.12.8\Tools\mingw730_64\bin
Opencv4.5下载及安装
从Opencv官网上下载，window下版本https://sourceforge.net/projects/opencvlibrary/files/4.5.0/opencv-4.5.0-vc14_vc15.exe/download
下载完成后将opencv压缩包提取到"D:/",D盘下会自动生成opencv文件下，下面有build和source两个子文件夹，build下有vc14和vc15两个适用于visual studio编译好的版本，需要要编译一个适用于Qt的MinGW版本。
Cmake下载及安装
从Cmake官网下载cmake-3.7.2-win64-x64.msi，https://cmake.org/download/，安装时勾选Add CMake to the system PATH for all users,即为CMake添加系统环境变量
使用CMake生成OpenCV的Makefile
打开 cmake-gui，设置源码和生成路径
- where is the source code: D:/opencv/sources
- where to build the binaries: D:/opencv/buildmingw
点击 Configure，设置编译器
- Specify the generator for this project: MinGW Makefiles
- Specify native compilers
- Next
- Compilers C: C:\Qt\Qt5.12.8\Tools\mingw730_64\bin\gcc.exe
- Compilers C++: C:\Qt\Qt5.12.8\Tools\mingw730_64\bin\g++.exe
- Finish
点击 Configure
编译配置：
- 勾选 WITH_QT
- 勾选 WITH_OPENGL
- 不勾选 OPENCV_ENABLE_ALLOCATOR_STATS
- CMAKE_BUILD_TYPE 选择 Release
点击 Configure，Generate 生成 Makefile，成功后会有“Configuring done
Generating done”
配置信息如下
General configuration for OpenCV 4.5.0 =====================================
Version control: unknown
Platform:
Timestamp: 2020-11-15T04:33:30Z
Host: Windows 10.0.19042 AMD64
CMake: 3.7.2
CMake generator: MinGW Makefiles
CMake build tool: C:/Qt/Qt5.12.8/Tools/mingw730_64/bin/mingw32-make.exe
Configuration: Release
CPU/HW features:
Baseline: SSE SSE2 SSE3
requested: SSE3
Dispatched code generation: SSE4_1 SSE4_2 FP16 AVX AVX2
requested: SSE4_1 SSE4_2 AVX FP16 AVX2 AVX512_SKX
SSE4_1 (17 files): + SSSE3 SSE4_1
SSE4_2 (2 files): + SSSE3 SSE4_1 POPCNT SSE4_2
FP16 (1 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 AVX
AVX (5 files): + SSSE3 SSE4_1 POPCNT SSE4_2 AVX
AVX2 (31 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2
C/C++:
Built as dynamic libs?: YES
C++ standard: 11
C++ Compiler: C:/Qt/Qt5.12.8/Tools/mingw730_64/bin/g++.exe (ver 7.3.0)
C++ flags (Release): -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -Winit-self -Wsuggest-override -Wno-delete-non-virtual-dtor -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -fomit-frame-pointer -ffunction-sections -fdata-sections -msse -msse2 -msse3 -fvisibility=hidden -fvisibility-inlines-hidden -O3 -DNDEBUG -DNDEBUG
C++ flags (Debug): -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -Winit-self -Wsuggest-override -Wno-delete-non-virtual-dtor -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -fomit-frame-pointer -ffunction-sections -fdata-sections -msse -msse2 -msse3 -fvisibility=hidden -fvisibility-inlines-hidden -g -O0 -DDEBUG -D_DEBUG
C Compiler: C:/Qt/Qt5.12.8/Tools/mingw730_64/bin/gcc.exe
C flags (Release): -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wuninitialized -Winit-self -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -fomit-frame-pointer -ffunction-sections -fdata-sections -msse -msse2 -msse3 -fvisibility=hidden -O3 -DNDEBUG -DNDEBUG
C flags (Debug): -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wuninitialized -Winit-self -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -fomit-frame-pointer -ffunction-sections -fdata-sections -msse -msse2 -msse3 -fvisibility=hidden -g -O0 -DDEBUG -D_DEBUG
Linker flags (Release): -Wl,--gc-sections
Linker flags (Debug): -Wl,--gc-sections
ccache: NO
Precompiled headers: NO
Extra dependencies: glu32 opengl32
3rdparty dependencies:
OpenCV modules:
To be built: calib3d core dnn features2d flann gapi highgui imgcodecs imgproc ml objdetect photo stitching ts video videoio
Disabled: world
Disabled by dependency: -
Unavailable: java js python2 python3
Applications: tests perf_tests apps
Documentation: NO
Non-free algorithms: NO
Windows RT support: NO
GUI:
QT: YES (ver 5.12.8)
QT OpenGL support: YES (Qt5::OpenGL 5.12.8)
Win32 UI: YES
OpenGL support: YES (glu32 opengl32)
VTK support: NO
Media I/O:
ZLib: build (ver 1.2.11)
JPEG: build-libjpeg-turbo (ver 2.0.5-62)
WEBP: build (ver encoder: 0x020f)
PNG: build (ver 1.6.37)
TIFF: build (ver 42 - 4.0.10)
JPEG 2000: build (ver 2.3.1)
OpenEXR: build (ver 2.3.0)
HDR: YES
SUNRASTER: YES
PXM: YES
PFM: YES
Video I/O:
DC1394: NO
FFMPEG: NO
avcodec: NO
avformat: NO
avutil: NO
swscale: NO
avresample: NO
GStreamer: NO
DirectShow: YES
Parallel framework: none
Trace: YES (built-in)
Other third-party libraries:
Lapack: NO
Eigen: NO
Custom HAL: NO
Protobuf: build (3.5.1)
OpenCL: YES (no extra features)
Include path: D:/opencv/sources/3rdparty/include/opencl/1.2
Link libraries: Dynamic load
Python (for build): NO
Java:
ant: NO
JNI: NO
Java wrappers: NO
Java tests: NO
Install to: D:/opencv/buildmingw/install
-----------------------------------------------------------------
Configuring done
Generating done
编译OpenCV
打开PowerShell进行编译：（-j 是使用 8 个线程进行编译，请根据你的计算机配置合理设置线程数）
cd D:\opencv\buildmingw
mingw32-make -j 8
mingw32-make install
OpenCV(MinGW)添加环境变量
在系统变量 Path中为OpenCV添加环境变量
- D:\opencv\buildmingw\install\x64\mingw\bin
创建Qt Widgets Application
在xx.pro中添加如下配置
INCLUDEPATH += D:\opencv\buildmingw\install\include
CONFIG(debug, debug|release): {
LIBS += D:\opencv\buildmingw\install\x64\mingw\bin\libopencv_*d.dll
} else:CONFIG(release, debug|release): {
LIBS += -LD:\opencv\buildmingw\install\x64\mingw\bin\
-llibopencv_core450 \
-llibopencv_highgui450 \
-llibopencv_imgcodecs450 \
-llibopencv_imgproc450 \
-llibopencv_features2d450 \
-llibopencv_calib3d450
}
注意需使用Release构建程序（上面编译OPENCV_BUILD_TYPE选择了Release）
mainwindow.cpp代码如下
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include
#include
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
, ui(new Ui::MainWindow)
{
ui->setupUi(this);
// read an image
cv::Mat image = cv::imread("C:\\Users\\wayne\\Desktop\\Image_20201109143933747.bmp",0);
// create image window named "My Image"
cv::namedWindow("My Image");
// show the image on window
cv::imshow("My Image", image);
}
MainWindow::~MainWindow()
{
delete ui;
}
参考资料
- 官方教程 https://wiki.qt.io/How_to_setup_Qt_and_openCV_on_Windows
- OpenCV使用CMake和MinGW的编译安装及其在Qt配置运行 https://blog.csdn.net/huihut/article/details/78701814
- https://blog.csdn.net/nohopenolove/article/details/106411477