多种GUI对图像进行简单操作（qt【linux和win7环境】、MFC、MATLAB）

环境：linux+qtcreator2.3+opencv2.31

1.配置好Creator环境

2.新建工程

3.配置pro文件，将opencv库路径添加到pro中

4.编辑ui界面文件，绘制2个按钮和2个label，保存文件

右键添加槽函数

实现：

void MainWindow::on_openPushButton_clicked(){    QString filename = QFileDialog::getOpenFileName(this,tr("Open Image"),"",tr("Image File(*.bmp *.jpg *.jpeg *.png *.ico)"));    QTextCodec *code = QTextCodec::codecForName("gb18030");    std::string name = code->fromUnicode(filename).data();    cout<<name<<endl;     origin_image= cv::imread(name,1);     if(!origin_image.data)    {        QMessageBox msgBox;        msgBox.setText(tr("image data is null"));        msgBox.exec();    }    else    {        int hight =ui->label->height();        int width =ui->label->width();        cout<<"hight is "<<hight<<" width is"<<width<<endl;        cv::resize(origin_image,processed_image,cv::Size(width,hight));        cv::cvtColor(processed_image,processed_image,CV_BGR2RGB);        cv::imshow("origin_image",origin_image);         cv::imshow("processed_image",processed_image);        img = QImage((const unsigned char*)(processed_image.data),processed_image.cols,processed_image.rows,QImage::Format_RGB888);        ui->label->clear();        ui->label->setPixmap(QPixmap::fromImage(img));        ui->processPushButton->setEnabled(true);       // ui->label->resize(ui->label->pixmap()->size());    }}void MainWindow::on_processPushButton_clicked(){    //cv::Sobel(processed_image,processed_image,CV_8U,1,0);    cv::flip(processed_image,processed_image,1);    //cv::cvtColor(processed_image,processed_image,CV_BGR2RGB);    img = QImage((const unsigned char*)(processed_image.data),processed_image.cols,processed_image.rows,QImage::Format_RGB888);    ui->label2->clear();    ui->label2->setPixmap(QPixmap::fromImage(img));    ui->processPushButton->setEnabled(true);    //ui->label2->resize(ui->label->pixmap()->size());    ui->label2->setPixmap(QPixmap::fromImage(img));}

QT文件选择对话框获取文件名

    QString filename = QFileDialog::getOpenFileName(this,tr("Open Image"),"",tr("Image File(*.bmp *.jpg *.jpeg *.png *.ico)"));    QTextCodec *code = QTextCodec::codecForName("gb18030");    std::string name = code->fromUnicode(filename).data();

4、实现效果：

    发现有些图显示正常，而有些图和原图对比失真严重

  原因在于图像在存储数据时的方式：opencv在存储图像宽度不是4的倍数时，对图像行进行了填补格式，以4补齐。这样如果Qimage的宽度不是4的倍数时会造成图像显示不正常。将Qimage宽度调整为4的倍数即可显示正常，这里对原图像进行了缩放，将其缩放成lable的大小，使label的宽度为4的倍数即可。另外QImage是RGB排列，而Mat 是 BGR，在显示时需要进行转换。

cv::cvtColor(processed_image,processed_image,CV_BGR2RGB);img = QImage((const unsigned char*)(processed_image.data),processed_image.cols,processed_image.rows,QImage::Format_RGB888);

  路径包含中文时，无法读取图像。

环境：win7+qt5.51+opencv2.4.10

与linux下基本一样，将pro文件配置好即可。 

QT       += core guigreaterThan(QT_MAJOR_VERSION, 4): QT += widgetsTARGET = cvshowTEMPLATE = appSOURCES += main.cpp\        mainwindow.cppHEADERS  += mainwindow.hFORMS    += mainwindow.uiINCLUDEPATH += G:\opencv2410\build\includeCONFIG(release,debug|release){    LIBS += G:\opencv2410\build\x86\vc10\lib\opencv_calib3d2410.lib \            G:\opencv2410\build\x86\vc10\lib\opencv_contrib2410.lib \            G:\opencv2410\build\x86\vc10\lib\opencv_core2410.lib \            G:\opencv2410\build\x86\vc10\lib\opencv_features2d2410.lib \            G:\opencv2410\build\x86\vc10\lib\opencv_flann2410.lib \            G:\opencv2410\build\x86\vc10\lib\opencv_gpu2410.lib \            G:\opencv2410\build\x86\vc10\lib\opencv_highgui2410.lib \            G:\opencv2410\build\x86\vc10\lib\opencv_imgproc2410.lib \            G:\opencv2410\build\x86\vc10\lib\opencv_legacy2410.lib \            G:\opencv2410\build\x86\vc10\lib\opencv_ml2410.lib \            G:\opencv2410\build\x86\vc10\lib\opencv_nonfree2410.lib \            G:\opencv2410\build\x86\vc10\lib\opencv_objdetect2410.lib \            G:\opencv2410\build\x86\vc10\lib\opencv_photo2410.lib \            G:\opencv2410\build\x86\vc10\lib\opencv_stitching2410.lib \            G:\opencv2410\build\x86\vc10\lib\opencv_video2410.lib \            G:\opencv2410\build\x86\vc10\lib\opencv_videostab2410.lib \}CONFIG(debug,debug|release){    LIBS += G:\opencv2410\build\x86\vc10\lib\opencv_calib3d2410d.lib \            G:\opencv2410\build\x86\vc10\lib\opencv_contrib2410d.lib \            G:\opencv2410\build\x86\vc10\lib\opencv_core2410d.lib \            G:\opencv2410\build\x86\vc10\lib\opencv_features2d2410d.lib \            G:\opencv2410\build\x86\vc10\lib\opencv_flann2410d.lib \            G:\opencv2410\build\x86\vc10\lib\opencv_gpu2410d.lib \            G:\opencv2410\build\x86\vc10\lib\opencv_highgui2410d.lib \            G:\opencv2410\build\x86\vc10\lib\opencv_imgproc2410d.lib \            G:\opencv2410\build\x86\vc10\lib\opencv_legacy2410d.lib \            G:\opencv2410\build\x86\vc10\lib\opencv_ml2410d.lib \            G:\opencv2410\build\x86\vc10\lib\opencv_nonfree2410d.lib \            G:\opencv2410\build\x86\vc10\lib\opencv_objdetect2410d.lib \            G:\opencv2410\build\x86\vc10\lib\opencv_photo2410d.lib \            G:\opencv2410\build\x86\vc10\lib\opencv_stitching2410d.lib \            G:\opencv2410\build\x86\vc10\lib\opencv_ts2410d.lib \            G:\opencv2410\build\x86\vc10\lib\opencv_video2410d.lib \            G:\opencv2410\build\x86\vc10\lib\opencv_videostab2410d.lib \}

环境：Win7+VS2010+Opencv2.4.10

MFC：

  需要将图像转换成CvvImage格式

文件选择对话框

OPENFILENAME ofn ;// a another memory buffer to contain the file namechar szFile[100] ;

        // open a file nameTCHAR szFile[100] = {0};//GetWindowText(szFile, _countof(szFile));ZeroMemory( &ofn , sizeof( ofn));ofn.lStructSize = sizeof ( ofn );ofn.hwndOwner = NULL  ;ofn.lpstrFile = szFile ;ofn.lpstrFile[0] = '\0';ofn.nMaxFile = sizeof( szFile );ofn.lpstrFilter = "All\0*.*\0Text\0*.TXT\0";ofn.nFilterIndex =1;ofn.lpstrFileTitle = NULL ;ofn.nMaxFileTitle = 0 ;ofn.lpstrInitialDir=NULL ;ofn.Flags = OFN_PATHMUSTEXIST|OFN_FILEMUSTEXIST ;GetOpenFileName( &ofn );   // Now simpley display the file name//MessageBox ( NULL , ofn.lpstrFile , "File Name" , MB_OK);std::cout<<ofn.lpstrFile<<std::endl;TRACE( "图片路径：%s\n",ofn.lpstrFile); //MFC程序不存在控制台,需要用TRACE输出cv::Mat image =cv::imread(ofn.lpstrFile);

打开/保存文件对话框:CFileDialog

MATLAB+GUI

   打开文件对话框：uigetfile

[filename,pathname]=uigetfile({'*.*';'*.jpg';'*.bmp';'*.gif'},'选择图片');if isequal(filename,0)    disp('Users Selected Canceled');elsestr=[pathname filename];im = imread(str);imshow(im);