QT与OpenCV编写摄像头图像处理程序

#include "navideo.h" #include "ui_navideo.h" navideo::navideo(QWidget *parent) : QMainWindow(parent), ui(new Ui::navideo) { ui->setupUi(this); MaxMin = false; isDrawing = false; VideoOpen = false; RectDraw = false; RMax = 256; RMin = 256; GMax = 256; GMin = 256; BMax = 256; BMin = 256; SizeValue = 50; BrigValue = 50; AreaValue = 50; LineColor = Qt::green; BrushColor = Qt::yellow; FrameColor = Qt::red; LabX = ui->lab_video->x(); LabY = ui->lab_video->y(); LineX = ui->lab_line->x(); LineY = ui->lab_line->y(); BrushX = ui->lab_brush->x(); BrushY = ui->lab_brush->y(); FrameX = ui->lab_frame->x(); FrameY = ui->lab_frame->y(); LabWidth = ui->lab_video->width(); LabHeight = ui->lab_video->height(); LineWidth = ui->lab_line->width(); LineHeight = ui->lab_line->height(); BrushWidth = ui->lab_brush->width(); BrushHeight = ui->lab_brush->height(); FrameWidth = ui->lab_frame->width(); FrameHeight = ui->lab_frame->height(); timer = new QTimer(this); qCamera = new QImage(); connect(timer, SIGNAL(timeout()), SLOT(ReadFrame())); } navideo::~navideo() { delete ui; } void navideo::on_btn_camera_clicked() { if(!VideoOpen) { ui->btn_camera->setText("Camera CLOSE"); pCapture = cvCreateCameraCapture(0); timer->start(VIDEORATE); VideoOpen = true; } else { timer->stop(); ui->btn_camera->setText("Camera OPEN"); cvReleaseCapture(&pCapture); cvReleaseImage(&pCameraReshape); ui->lab_video->clear(); VideoOpen = false; ui->lab_infoR->setText("null"); ui->lab_infoG->setText("null"); ui->lab_infoB->setText("null"); ui->lab_infoUD->setText("null"); ui->lab_infoLR->setText("null"); ui->lab_infoCE->setText("null"); } } void navideo::ReadFrame() { pCamera = cvQueryFrame(pCapture); TarPic.width = pCamera->width * SizeValue/100; TarPic.height = pCamera->height * SizeValue/100; int DeltaI = (TarPic.width - LabWidth)/2; int DeltaJ = (TarPic.height - LabHeight)/2; int GrayMax = qRound(RMax * 0.299 + GMax * 0.587 + BMax * 0.114); int GrayMin = qRound(RMin * 0.299 + GMin * 0.587 + BMin * 0.114); if(SizeValue <= 50) { DeltaI = 0;DeltaJ = 0; int DeltaX = LabWidth - TarPic.width; int DeltaY = LabHeight - TarPic.height; LabWidth = TarPic.width; LabHeight = TarPic.height; LabX = LabX + DeltaX/2; LabY = LabY + DeltaY/2; ui->lab_video->resize(LabWidth, LabHeight); ui->lab_video->move(LabX, LabY); } pStorage = cvCreateMemStorage(0); pContourImage = cvCreateImage(TarPic, pCamera->depth, 3); pCameraReshape = cvCreateImage(TarPic, pCamera->depth, 3); pCameraContour = cvCreateImage(TarPic, pCamera->depth, 1); cvResize(pCamera, pCameraReshape, CV_INTER_AREA); cvCvtColor(pCameraReshape, pCameraReshape, CV_BGR2YUV); LUTMat = cvCreateMatHeader(1, 256, CV_8UC3);//change YUV Channels values cvSetData(LUTMat, LUTPara, 0); for(int ki = 0; ki < 256; ki++) { BrigPara = ki + 5 * (BrigValue - 50); if(BrigPara > 255){BrigPara = 255;} else if(BrigPara < 0){BrigPara = 0;} LUTPara[ki][0] = (uchar)BrigPara; LUTPara[ki][1] = (uchar)ki; LUTPara[ki][2] = (uchar)ki; } cvLUT(pCameraReshape, pCameraReshape, LUTMat); cvCvtColor(pCameraReshape, pCameraReshape, CV_YUV2RGB); cvCvtColor(pCameraReshape, pCameraContour, CV_RGB2GRAY); cvThreshold(pCameraContour, pCameraContour, GrayMin, 0, CV_THRESH_TOZERO); cvThreshold(pCameraContour, pCameraContour, GrayMax, 0, CV_THRESH_TOZERO_INV); cvMorphologyEx(pCameraContour, pCameraContour, NULL, NULL, CV_MOP_OPEN, 2); cvFindContours(pCameraContour, pStorage, &FirstContour, sizeof(CvContour), CV_RETR_LIST); double ThresholdLow = (0.02 * AreaValue - AREAFIXED) * PixArea; double ThresholdHigh = (0.02 * AreaValue + AREAFIXED) * PixArea; if(ui->check_single->isChecked()) { if(PixArea < LabWidth * LabHeight/9) { ThresholdHigh = THRESHOLDPARA * ThresholdHigh; } else if(PixArea > 4 * LabWidth * LabHeight/9) { ThresholdLow = ThresholdLow/THRESHOLDPARA; } else { ThresholdLow = 2 * ThresholdLow/THRESHOLDPARA; ThresholdHigh = THRESHOLDPARA * ThresholdHigh/2; } } for (GetContourTag = FirstContour; GetContourTag != NULL; GetContourTag = GetContourTag->h_next) { ContourArea = fabs(cvContourArea(GetContourTag, CV_WHOLE_SEQ)); if((ContourArea > ThresholdLow)&(ContourArea < ThresholdHigh)) { TargetRect = cvBoundingRect(GetContourTag); LeftBou = TargetRect.x - DeltaI; RightBou = TargetRect.x + TargetRect.width - DeltaI; UpBou = TargetRect.y - DeltaJ; DownBou = TargetRect.y + TargetRect.height - DeltaJ; if(UpBou < 1){UpBou = 1;} else if(UpBou > LabHeight - 1){UpBou = LabHeight - 1;} if(DownBou < 1){DownBou = 1;} else if(DownBou > LabHeight - 1){DownBou = LabHeight - 1;} if(LeftBou < 1){LeftBou = 1;} else if(LeftBou > LabWidth - 1){LeftBou = LabWidth - 1;} if(RightBou < 1){RightBou = 1;} else if(RightBou > LabWidth - 1){RightBou = LabWidth - 1;} CenterX = (LeftBou + RightBou)/2; CenterY = (UpBou + DownBou)/2; PicRGB = cvGet2D(pCameraReshape, CenterY + DeltaJ, CenterX + DeltaI); if((PicRGB.val[0] >= RMin)&&(PicRGB.val[0] <= RMax)&&(PicRGB.val[1] >= GMin)&& (PicRGB.val[1] <= GMax)&&(PicRGB.val[2] >= BMin)&&(PicRGB.val[2] <= BMax)) { RectDraw = true; ui->lab_infoUD->setText(tr("%1,%2").arg(UpBou).arg(DownBou)); ui->lab_infoLR->setText(tr("%1,%2").arg(LeftBou).arg(RightBou)); ui->lab_infoCE->setText(tr("%1,%2").arg(CenterX).arg(CenterY)); break; } } if(GetContourTag->h_next == NULL) { ui->lab_infoUD->setText("null"); ui->lab_infoLR->setText("null"); ui->lab_infoCE->setText("null"); } } for(int i = 0; i < LabWidth; i++)//change RGB Channels values { for(int j = 0; j < LabHeight; j++) { PicRGB = cvGet2D(pCameraReshape, j + DeltaJ, i + DeltaI); if(isDrawing) { if((i > XStartSave)&&(i < XEndSave)&&(j > YStartSave)&&(j < YEndSave)) { if(MaxMin) { RMaxSave = PicRGB.val[0]; RMinSave = PicRGB.val[0]; GMaxSave = PicRGB.val[1]; GMinSave = PicRGB.val[1]; BMaxSave = PicRGB.val[2]; BMinSave = PicRGB.val[2]; MaxMin = false; } else { RMaxSave = qMax((int)PicRGB.val[0], RMaxSave); RMinSave = qMin((int)PicRGB.val[0], RMinSave); GMaxSave = qMax((int)PicRGB.val[1], GMaxSave); GMinSave = qMin((int)PicRGB.val[1], GMinSave); BMaxSave = qMax((int)PicRGB.val[2], BMaxSave); BMinSave = qMin((int)PicRGB.val[2], BMinSave); } } } if((PicRGB.val[0] >= RMin)&&(PicRGB.val[0] <= RMax)&&(PicRGB.val[1] >= GMin)&& (PicRGB.val[1] <= GMax)&&(PicRGB.val[2] >= BMin)&&(PicRGB.val