对视频中的画面进行截图

#include "viewer.h" #include <opencv/cv.h> #include <QPainter> Viewer::Viewer(QWidget *parent) : QWidget(parent) { m_imageBuf=NULL; resize(parent->width(), parent->height()); widthRatio=1.0*width()/OrinCamWidth; heighRatio=1.0*height()/OrinCamHeight; double minRatio=(widthRatio<heighRatio)?widthRatio:heighRatio; new_width=width()*minRatio; new_height=height()*minRatio; resize(new_width,new_height); std::cout<<"parent->width()="<<parent->width()<<" ,width()= "<<width()<<" ,new_width= "<< new_width<<std::endl; resizeImg = cvCreateImage(cvSize(new_width,new_height),IPL_DEPTH_8U, 3); dispImg=cvCreateImageHeader(cvSize(new_width,new_height), IPL_DEPTH_8U, 3); assert(dispImg); paintQImage=new QImage(new_width,new_height, QImage::Format_RGB888); currentSize = cvSize(new_width,new_height); dispImg->imageData=(char*)paintQImage->bits(); widthRatio=1.0*new_width/720; heighRatio=1.0*new_height/576; ratiow=1; ratioh=1; state=IDEL; objectSum=0; setMouseTracking(true); m_imageChanged=false; drawRect_isDown = false; crossline_enable=false; slitrect_enable= true; crosspoint.setX(width()/2); crosspoint.setY(height()/2); showcircle=false; } Viewer::~Viewer(){ cvReleaseImage(&resizeImg); cvReleaseImageHeader(&dispImg); } void Viewer::receive_image(const IplImage* img){ assert(img); assert(img->nChannels==3 && img->depth==IPL_DEPTH_8U); if(!m_imageBuf) m_imageBuf=cvCreateImage(cvGetSize(img), 8, 3); else if(m_imageBuf->width!=img->width || m_imageBuf->height!=img->height){ cvReleaseImage(&m_imageBuf); m_imageBuf=cvCreateImage(cvGetSize(img), 8, 3); widthRatio=1.0*img->width /640; heighRatio=1.0*img->height/480; } cvCopyImage(img, m_imageBuf); cvCvtColor(m_imageBuf,m_imageBuf,CV_BGR2RGB); if(resizeImg->width!=m_imageBuf->width || resizeImg->height!=m_imageBuf->height) cvResize(m_imageBuf, resizeImg); else cvCopy(m_imageBuf, resizeImg); if(m_imageBuf){ widthRatio=1.0*width()/m_imageBuf->width; heighRatio=1.0*height()/m_imageBuf->height; } // std::cout<<widthRatio<<heighRatio<<std::endl; m_imageChanged=true; update(); } void Viewer::paintEvent(QPaintEvent*){ if(m_imageChanged){ if(resizeImg->width!=new_width || resizeImg->height!=new_height){ cvReleaseImage(&resizeImg); cvReleaseImageHeader(&dispImg); delete paintQImage; resizeImg=cvCreateImage(cvSize(new_width,new_height), 8, 3); dispImg=cvCreateImageHeader(cvSize(new_width,new_height), 8, 3); paintQImage=new QImage(new_width,new_height, QImage::Format_RGB888); dispImg->imageData=(char*)paintQImage->bits(); } if(m_imageBuf){ cvResize(m_imageBuf, resizeImg, CV_INTER_NN); } m_imageChanged=false; } cvCopy(resizeImg,dispImg); // draw_frame(*paintQImage,patternCircleFrame, QPen(QColor(0,255,0))); draw_frame(*paintQImage,patternFrame, QPen(QColor(255,5,255))); if(crossline_enable) draw_cross_line(*paintQImage); QPainter painter(this); painter.drawImage(QPoint(0,0),*paintQImage); // if(slitrect_enable&&drawRect){ // painter.setPen(QPen(QColor(255, 0, 255))); // painter.drawRect(QRect(pt1,pt2)); //画矩形框 // //enable=true; // } // if(drawRect_isDown){ // // QPoint point1,point2; // //point1.setX(); // painter.setPen(QPen(QColor(255, 0, 255))); // painter.drawRect(QRect(Rect_start,Rect_stop)); // //enable=false; // } } void Viewer::draw_cross_line(QImage& qImage){ QPainter painter(&qImage); QPen pen(QColor(0,0,255)); pen.setStyle(Qt::DashLine); painter.setPen(pen); painter.drawLine(0, crosspoint.y(), qImage.width(), crosspoint.y()); painter.drawLine(crosspoint.x(), 0, crosspoint.x(), qImage.height()); } void Viewer::draw_ponit(QImage& qImage){ QPainter painter(&qImage); QPen pen(QColor(0,255,0)); //pen.setStyle(Qt::DashLine); painter.setPen(pen); painter.drawLine(0,0,232,232); //painter.drawLine(p1.x(),p1.y(),p3.x(),p3.y()); } void Viewer::mousePressEvent(QMouseEvent *event){ if(event->button()==Qt::RightButton){ cursorx=event->pos().x(); cursory=event->pos().y(); //std::cout<<"right_press_point"<<cursorx<<" "<<cursory<<std::endl; // emit left_press(cursorx, cursory); event->accept(); } else if(event->button()==Qt::LeftButton){ if(state==READY){ cursorx=event->pos().x(); cursory=event->pos().y(); //std::cout<<cursorx<<" "<<cursory<<std::endl; state=CHANGING; event->accept(); } else { drawRect_isDown = true; drawRect=false; Rect_start = event->pos(); Rect_stop = event->pos(); //std::cout<<Rect_start.x()<<" "<<Rect_start.y()<<std::endl; } } } void Viewer::mouseReleaseEvent(QMouseEvent *event){ if(event->button()==Qt::RightButton){ if(state==CHANGING) state=READY; } if(event->button()==Qt::LeftButton){ if(state==CHANGING) state=READY; else if(drawRect_isDown){ if(Rect_stop.x()!=Rect_start.x()||Rect_stop.y()!=Rect_start.y()){ pt1.setX(crosspoint.x()-abs(Rect_start.x()-Rect_stop.x())*0.5); pt1.setY(crosspoint.y()-abs(Rect_start.y()-Rect_stop.y())*0.5); pt2.setX(crosspoint.x()+abs(Rect_start.x()-Rect_stop.x())*0.5); pt2.setY(crosspoint.y()+abs(Rect_start.y()-Rect_stop.y())*0.5); // emit rect_press(abs(Rect_stop.x()-Rect_start.x())/2+qMin(Rect_stop.x(),Rect_start.x()), abs(Rect_stop.y()-Rect_start.y())/2+qMin(Rect_stop.y(),Rect_start.y()),abs(Rect_stop.x()-Rect_start.x()),abs(Rect_stop.y()-Rect_start.y())); //std::cout<<(abs(Rect_stop.x()-Rect_start.x())/2+qMin(Rect_stop.x(),Rect_start.x()))<<" "<<(abs(Rect_stop.y()-Rect_start.y())/2+qMin(Rect_stop.y(),Rect_start.y()))<<std::endl; } drawRect=true; drawRect_isDown=false; } } } void Viewer::mouseMoveEvent(QMouseEvent *event){ // enum{IDEL, READY, CHANGING}state; //std::cout<<"state is "<<state<<std::endl; static RectangleFrame::ChangeType oldChangeType=RectangleFrame::nochange; static CircleFrame::ChangeType oldCircleChangeType=CircleFrame::nochange; QPoint pos= event->pos(); int x=pos.x(); int y=pos.y(); if(x<0 ||y<0 ||x>=width() ||y>=height()){ event->accept(); return; } if(state==READY){ RectangleFrame::ChangeType changeType; CircleFrame::ChangeType changeCircleType; if(showcircle){ changeCircleType=patternCircleFrame.get_ready_change_type(x,y,sensitiveRange); //change the cursor shape if(changeCircleType!=oldCircleChangeType){ oldCircleChangeType=changeCircleType; switch(changeCircleType){ case CircleFrame::MOVE: setCursor(Qt::SizeAllCursor); break; case CircleFrame::top: case CircleFrame::bottom: setCursor(Qt::SizeVerCursor); break; case CircleFrame::left: case CircleFrame::right: setCursor(Qt::SizeHorCursor); break; default: setCursor(Qt::ArrowCursor); } } } else{