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#include "mainwidget.h" #include <QDebug> MainWidget::MainWidget(QWidget *parent)     : QWidget(parent) {     this->m_vLayout=new QVBoxLayout;     this->m_hLayout=new QHBoxLayout;     this->m_btnRGB=new QToolButton;     this->m_btnRGB->setText(tr("RGB"));     connect(this->m_btnRGB,SIGNAL(clicked()),this,SLOT(ZSlot2RGB()));     this->m_btnGray=new QToolButton;     this->m_btnGray->setText(tr("Gray"));     connect(this->m_btnGray,SIGNAL(clicked()),this,SLOT(ZSlot2Gray()));     this->m_btnFindCircle=new QToolButton;     this->m_btnFindCircle->setText(tr("Recognize"));     connect(this->m_btnFindCircle,SIGNAL(clicked()),this,SLOT(ZSlotFindCircle()));     this->m_hLayout->addWidget(this->m_btnRGB);     this->m_hLayout->addWidget(this->m_btnGray);     this->m_hLayout->addWidget(this->m_btnFindCircle);     this->m_vLayout->addStretch(1);     this->m_vLayout->addLayout(this->m_hLayout);     this->setLayout(this->m_vLayout);     this->m_srcImg=cvLoadImage("/home/shell.albert/opencvtest/2.png");     if(this->m_srcImg)     {         //cvCvtColor(this->m_srcImg,this->m_srcImg,CV_BGR2RGB);         this->resize(this->m_srcImg->width+20,this->m_srcImg->height+20);         this->m_dstImg=cvCreateImage(cvGetSize(this->m_srcImg),IPL_DEPTH_8U,1);     }     this->m_imgAction=IMG_SHOW_RGB; } MainWidget::~MainWidget() {     delete this->m_btnGray;     delete this->m_btnRGB;     delete this->m_btnFindCircle;     delete this->m_hLayout;     delete this->m_vLayout;     if(this->m_srcImg)     {         cvReleaseImage(&this->m_srcImg);     }     if(this->m_dstImg)     {         cvReleaseImage(&this->m_dstImg);     } } void MainWidget::paintEvent(QPaintEvent *event) {     QPainter tPainter(this);     switch(this->m_imgAction)     {     case IMG_SHOW_RGB:     {         cvCvtColor(this->m_srcImg,this->m_srcImg,CV_BGR2RGB);         uchar *imgData=(uchar*)this->m_srcImg->imageData;         QImage tImage(imgData,this->m_srcImg->width,this->m_srcImg->height,this->m_srcImg->widthStep,QImage::Format_RGB888);         tPainter.drawImage(10,10,tImage);         cvCvtColor(this->m_srcImg,this->m_srcImg,CV_RGB2BGR);     }         break;     case IMG_SHOW_GRAY:     { #if 0         cvCvtColor(this->m_srcImg,this->m_dstImg,CV_BGR2GRAY);         uchar *imgData=(uchar*)this->m_dstImg->imageData;         QImage tImage(imgData,this->m_dstImg->width,this->m_dstImg->height,this->m_dstImg->widthStep,QImage::Format_Indexed8);         QVector<QRgb> colorTable;         for(qint32 i=0;i<256;i++)         {             colorTable.append(qRgb(i,i,i));         }         tImage.setColorTable(colorTable);         tImage.setColorCount(255);         tPainter.drawImage(10,10,tImage); #endif         IplImage *tDstImg=cvCreateImage(cvGetSize(this->m_srcImg),IPL_DEPTH_8U,1);         IplImage *tImg=cvCreateImage(cvGetSize(this->m_srcImg),IPL_DEPTH_8U,1);         cvCvtColor(this->m_srcImg,tDstImg,CV_BGR2GRAY);         cvCanny(tDstImg,tImg,50,150,3);         uchar *imgData=(uchar*)tImg->imageData;         QImage tImage(imgData,tImg->width,tImg->height,tImg->widthStep,QImage::Format_Indexed8);         QVector<QRgb> colorTable;         for(qint32 i=0;i<256;i++)         {             colorTable.append(qRgb(i,i,i));         }         tImage.setColorTable(colorTable);         tImage.setColorCount(255);         tPainter.drawImage(10,10,tImage);         cvReleaseImage(&tDstImg);         cvReleaseImage(&tImg);     }         break;     case IMG_FIND_CIRCLE:     {         //step 1:BGR to Gray.         cvCvtColor(this->m_srcImg,this->m_dstImg,CV_BGR2GRAY);         CvMemStorage *storage=cvCreateMemStorage(0);         //cvSmooth(dstImg,dstImg,CV_GAUSSIAN,5,5);         CvSeq *circles=cvHoughCircles(this->m_dstImg,storage,CV_HOUGH_GRADIENT,2,this->m_dstImg->width/3,300,100,0,200);         IplImage *color=cvCreateImage(cvGetSize(this->m_dstImg),IPL_DEPTH_8U,3);         cvCvtColor(this->m_dstImg,color,CV_GRAY2RGB);         printf("circle total=%d\n",circles->total);         for(int i=0;i<circles->total;i++)         {             float *p=(float*)cvGetSeqElem(circles,i);             float tX=p[0];             float tY=p[1];             float tRadius=p[2];             //the destination is on the right side             //so here we ignore the left.             if(tX<this->m_srcImg->width/2)             {                 qDebug()<<"bypass left side";                 continue;             }             //draw a circle to wrap it.             CvPoint pt=cvPoint(cvRound(p[0]),cvRound(p[1]));             cvCircle(color,pt,cvRound(p[2]),CV_RGB(255,0,0),3,8,0);             //draw a 10x10 rectangle aroud circle center.             CvPoint pt1=pt;             CvPoint pt2=pt;             pt1.x-=5;             pt1.y-=5;             pt2.x+=5;             pt2.y+=5;             cvRectangle(color,pt1,pt2,cvScalar(255,0,0,0),3);             //draw text.             CvPoint txtPt=pt;             txtPt.y-=40;             txtPt.x-=60;             const char *txtInfo="fint it!";             CvFont tFont=cvFont(3.0,3);             cvPutText(color,txtInfo,txtPt,&tFont,cvScalar(255,255,0));         }         //step3.display it.         uchar *imgData=(uchar*)color->imageData;         QImage tImage(imgData,color->width,color->height,color->widthStep,QImage::Format_RGB888);         tPainter.drawImage(10,10,tImage);         cvReleaseImage(&color);     }         break;     default:         break;     } } void MainWidget::ZSlot2RGB() {     this->m_imgAction=IMG_SHOW_RGB;     this->update(); } void MainWidget::ZSlot2Gray() {     this->m_imgAction=IMG_SHOW_GRAY;     this->update(); } void MainWidget::ZSlotFindCircle() {     this->m_imgAction=IMG_FIND_CIRCLE;     this->update(); }

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