# OpenCV_Qt

**Repository Path**: zhangja0713/OpenCV_Qt

## Basic Information

- **Project Name**: OpenCV_Qt
- **Description**: Qt是一个1991年由Qt Company开发的跨平台C++图形用户界面应用程序开发框架；此处凭借QT 环境进行OpenCVの应用开发。
- **Primary Language**: C++
- **License**: 0BSD
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2020-06-30
- **Last Updated**: 2020-12-19

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# 1. Environment
- Windows10 64
- cmake-3.18.0
- Qt 5.12.9
- OpenCV 4.2.0
# 2. Software installed
- [Qt 5.12.9 for Windows (3.7 GB) ](http://download.qt.io/official_releases/qt/5.12/5.12.9/qt-opensource-windows-x86-5.12.9.exe)
- [cmake-3.18.0-rc2-win64-x64.msi](https://github.com/Kitware/CMake/releases/download/v3.18.0-rc2/cmake-3.18.0-rc2-win64-x64.msi)
- [OpenCV – 4.2.0](https://sourceforge.net/projects/opencvlibrary/files/4.2.0/opencv-4.2.0-vc14_vc15.exe/download)


# 3. Add Windows environment variables path: 
```
D:\Qt\Qt5.12.9\5.12.9\mingw73_64\bin ①
D:\Qt\Qt5.12.9\Tools\mingw730_64\bin ②
```

# 4. Cmake:
1. where is the source code=`D:/OpenCV4.2.0/opencv/sources`
2. where is build the binaries=`D:/OpenCV4.2.0/opencv/release`
3. Click  Configure->MinGW Makefiles/Specify native compilers->C=`D:\Qt\Qt5.12.9\Tools\mingw730_64\bin\gcc`  && C++= `D:\Qt\Qt5.12.9\Tools\mingw730_64\bin\g++`
4. waiting...........

>............
Install to:                    C:/OpenCV4.2.0/release/install
————————————————————————
Configuring done

5. search:
```
with_OPENGL(√)
with_OPENMP(√)
ENABLE_PRECOMPILED_HEADERS(√)
build_opencv_world(√)
with_IPP()
with_OPENCL_D3D11_NV()
WITH_QT(√)
```
6. **Configure**
7. waitting........

>Warning: `C:\OpenCV4.2.0\opencv\sources\.cache\ffmpeg `有三个文件需要外网（翻墙），故需要预先下载好放置此处即可

8. **Configure**->直到发现红色区域变白->点击**Generate**

> ............
Install to:                    C:/OpenCV4.2.0/release/install
> ————————————————————————
Configuring done
Generating done


# 5. Add Windows environment variables path: 
```
D:\OpenCV4.2.0\opencv\release\bin   ③
D:\Qt\Qt5.12.9\Tools\QtCreator\bin  ④
```

D:\OpenCV4.2.0\QT-Cmake\install\x64\mingw\bin

# 6. 在release文件下：`shift+右击 `运行`Windows PowerShell`：
```
PS D:\OpenCV4.2.0\opencv\release> mingw32-make -j 8              //my CPU=8'Cores
PS D:\OpenCV4.2.0\opencv\release> mingw32-make install
```

# 7. QT Created
1. QT->QT Widgets App->Desktop Qt MinGW 32bit
2. 右击项目->添加外部库->库文件：`C:\OpenCV4.2.0\release\install\x64\mingw\lib\libopencv_world420.dll.a` && 包含路径=`C:\OpenCV4.2.0\release\install\include`
为debug版本添加‘d’作为后缀(×);

```
win32:CONFIG(release, debug|release): LIBS += -LD:/OpenCV4.2.0/opencv/release/install/x64/mingw/lib/ -llibopencv_world420.dll
else:win32:CONFIG(debug, debug|release): LIBS += -LD:/OpenCV4.2.0/opencv/release/install/x64/mingw/lib/ -llibopencv_world420.dll

INCLUDEPATH += D:/OpenCV4.2.0/opencv/release/install/include
DEPENDPATH += D:/OpenCV4.2.0/opencv/release/install/include
```


3. Source/main.cpp:

```
#include <opencv2/opencv.hpp>

using namespace std;
using namespace cv;
int main()
{
    Mat image;
    char keyPress;
    cout<<"Welcome to Qt\n";
    image=imread("C:/Users/Administrator/Pictures/lena.jpg",IMREAD_COLOR);
    imshow("Opnecv && QT",image);
    while (1) {
        keyPress=waitKey();
        if(keyPress=='q')
        {
            destroyAllWindows();
            break;
        }
    }
    return 0;
}
```

# 8. QT release for exe in other Windows

>准备工具：
1. QT5自带的windeployqt
2. [Engima Virtual Box](http://enigmaprotector.com/en/downloads.html)

1. 打开一个QT程序，以release方式运行一次
2. 在相应目录下会生成一个关于release的文件夹
3. 将文件下的`xxx.exe`程序拷贝出来，创建一个单独的文件夹`demo`中
4. 打开`Qt 5.12.9（MinGW 7.3.0 32-bit）`即`D:\Qt\Qt5.12.9\5.12.9\mingw73_32>`
`D:\Qt\Qt5.12.9\5.12.9\mingw73_32>`
5. `cd`至`demo`文件下，并输入如下命令行：`windeployqt xxx.exe` 敲击回车。这一步操作是将所需的库文件全都拷贝到exe程序的当前文件：
- `D:\Qt\Qt5.12.9\5.12.9\mingw73_32>  cd /d C:\Users\Administrator\Documents\demoPack`
- `C:\Users\Administrator\Documents\demoPack>  windeployqt CV_Qtdemo.exe`
![packet](_v_images/20200630091619468_24292.png =459x)

6. 将`demo`文件下这一堆文件进行打包：
- 打开运行**Enigma Virtual Box**
- Enter input file name:        Enter output file name:
- 将包内所有文件后，直接拖入`VIRTUAL BOX Files `框内，选择【Files Options】->Compress File(√)压缩文件
- 点击Protect即可

7. Enjoy youself!!