一、下载
- cmake 3.17.1
- opencv 4.2.0
- qt 5.12.2
- mingw 7.3.0 (64bit)
二、编译Opencv
- 创建一个newbuild文件夹
- 选定sources文件夹和newbuild文件夹所在位置
- 勾选WITH_QT的选项和QT安装的位置（位置建议手动设置，如果有多个版本的QT可能会出问题）
- 点击configure，设置编译器为本地的Mingw
Detected processor: AMD64
AVX_512F is not supported by C++ compiler
AVX512_COMMON is not supported by C++ compiler
AVX512_SKX is not supported by C++ compiler
Dispatch optimization AVX512_SKX is not available, skipped
libjpeg-turbo: VERSION = 2.0.2, BUILD = opencv-4.2.0-libjpeg-turbo
Could not find OpenBLAS include. Turning OpenBLAS_FOUND off
Could not find OpenBLAS lib. Turning OpenBLAS_FOUND off
Could NOT find BLAS (missing: BLAS_LIBRARIES)
LAPACK requires BLAS
A library with LAPACK API not found. Please specify library location.
VTK is not found. Please set -DVTK_DIR in CMake to VTK build directory, or to VTK install subdirectory with VTKConfig.cmake file
OpenCV Python: during development append to PYTHONPATH: D:/Software/opencv2/opencv/newbuild/python_loader
Excluding from source files list: <BUILD>/modules/core/test/test_intrin128.avx512_skx.cpp
Excluding from source files list: <BUILD>/modules/core/test/test_intrin256.avx512_skx.cpp
Excluding from source files list: <BUILD>/modules/core/test/test_intrin512.avx512_skx.cpp
Excluding from source files list: modules/imgproc/src/sumpixels.avx512_skx.cpp
Registering hook 'INIT_MODULE_SOURCES_opencv_dnn': D:/Software/opencv2/opencv/sources/modules/dnn/cmake/hooks/INIT_MODULE_SOURCES_opencv_dnn.cmake
opencv_dnn: filter out cuda4dnn source code
Excluding from source files list: <BUILD>/modules/dnn/layers/layers_common.avx512_skx.cpp
General configuration for OpenCV 4.2.0 =====================================
Version control: unknown
Platform:
Timestamp: 2021-05-18T15:58:23Z
Host: Windows 10.0.18363 AMD64
CMake: 3.17.1
CMake generator: MinGW Makefiles
CMake build tool: D:/Software/QT/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 (16 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 (29 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2
C/C++:
Built as dynamic libs?: YES
C++ Compiler: D:/Software/QT/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: D:/Software/QT/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:
3rdparty dependencies:
OpenCV modules:
To be built: calib3d core dnn features2d flann gapi highgui imgcodecs imgproc ml objdetect photo python3 stitching ts video videoio
Disabled: world
Disabled by dependency: -
Unavailable: java js python2
Applications: tests perf_tests apps
Documentation: NO
Non-free algorithms: NO
Windows RT support: NO
GUI:
QT: YES (ver 5.12.2)
QT OpenGL support: NO
Win32 UI: YES
VTK support: NO
Media I/O:
ZLib: build (ver 1.2.11)
JPEG: build-libjpeg-turbo (ver 2.0.2-62)
WEBP: build (ver encoder: 0x020e)
PNG: build (ver 1.6.37)
TIFF: build (ver 42 - 4.0.10)
JPEG 2000: build (ver 1.900.1)
OpenEXR: build (ver 2.3.0)
HDR: YES
SUNRASTER: YES
PXM: YES
PFM: YES
Video I/O:
DC1394: NO
FFMPEG: YES (prebuilt binaries)
avcodec: YES (58.54.100)
avformat: YES (58.29.100)
avutil: YES (56.31.100)
swscale: YES (5.5.100)
avresample: YES (4.0.0)
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:/Software/opencv2/opencv/sources/3rdparty/include/opencl/1.2
Link libraries: Dynamic load
Python 3:
Interpreter: C:/Users/Rwz/AppData/Local/Programs/Python/Python36/python.exe (ver 3.6.4)
Libraries: C:/Users/Rwz/AppData/Local/Programs/Python/Python36/libs/libpython36.a (ver 3.6.4rc1)
numpy: C:/Users/Rwz/AppData/Local/Programs/Python/Python36/lib/site-packages/numpy/core/include (ver 1.19.2)
install path: C:/Users/Rwz/AppData/Local/Programs/Python/Python36/Lib/site-packages/cv2/python-3.6
Python (for build): C:/Users/Rwz/AppData/Local/Programs/Python/Python36/python.exe
Install to: D:/Software/opencv2/opencv/newbuild/install
-----------------------------------------------------------------
Configuring done
FFMPEG配置时容易下载失败。失败会生成一个CMakeDownloadLog.txt，在里面找到网址自己手动下载。然后放在CMakeDownloadLog.txt中说明的下载的位置。
- 点击generate,在newbuild目录下打开cmd，输入命令mingw32-make j4
- 编译完成，输出mingw32-make install
- 在newbuild目录下会生成一个install目录。将其拷贝到一个工作目录中，就可以在QT中引用opencv了。
三、QT中使用Opencv
- 将上一步生成的install目录下bin目录添加进环境变量：（工作目录）installx64mingwin
- 将install目录下include问价和lib下的库加到QT的链接库中,在qt的pro文件中添加如下代码，需要自行修改install所在目录。
INCLUDEPATH+=D:/Rwz/opencv_420_use_dir/install/include
LIBS += -L D:/Rwz/opencv_420_use_dir/install/x64/mingw/lib/libopencv_*.a
- 使用opencv
#include "opencv2/opencv.hpp"
int main(int argc, char *argv[])
{
cv::Mat m = cv::imread("R:/123.jpg");
cv::imshow("title",m);
cv::waitKey(0);
return 0;
}
结果为：
