图像处理/机器视觉领域+ROI交互控件+VS2015+Qt+Halcon12

/** @file CHalconLabel.cpp @brief 绑定Halcon的QLabel界面 用于Halocn图像的显示与ROI交互 @author ZHU @version V1.0 2023.10.15 @updateTime 2023.10.15 @modified by ZHU @modified content 增加鼠标拖动事件 */ #include "CHalconLabel.h" CHalconLabel::CHalconLabel(QWidget *parent) : QLabel(parent) , m_bIsMove(false) , m_bIsDrawROI(false) { //初始化图像 gen_empty_obj(&hCurrentImage); //初始化ROI区域 gen_empty_obj(&m_drawnRegion); //设置文本位置---居中且上方，设置文本颜色 this->setAlignment(Qt::AlignTop | Qt::AlignHCenter); this->setStyleSheet("color: red;"); } CHalconLabel::~CHalconLabel() { } //窗体重绘事件 void CHalconLabel::resizeEvent(QResizeEvent *ev) { if (m_hHalconID != NULL) { //防止窗口闪烁 set_system("flush_graphic", "false"); //重新显示 #if 0 //显示一,充满整个画幅 clear_window(m_hHalconID); detach_background_from_window(m_hHalconID); HTuple imgWidth, imgHeight; get_image_size(ho_Image, &imgWidth, &imgHeight); set_part(m_hHalconID, 0, 0, imgHeight - 1, imgWidth - 1); attach_background_to_window(ho_Image, m_hHalconID); #endif #if 1 //显示二，维持原有图像比例且居中显示 clear_window(m_hHalconID); detach_background_from_window(m_hHalconID); int labelWidth = this->width(); //窗口尺寸 int labelHeight = this->height(); HTuple imgWidth, imgHeight; //原图尺寸 HTuple m_scaledWidth, m_scaledHeight; //缩放后的尺寸 HTuple m_hvScaledRate; //缩放比例 get_image_size(hCurrentImage, &imgWidth, &imgHeight); //获取缩放系数 tuple_min2(1.0 * labelWidth / imgWidth, 1.0 * labelHeight / imgHeight, &m_hvScaledRate); //进行图像缩放 zoom_image_factor(hCurrentImage, &ho_ImageZoom, m_hvScaledRate, m_hvScaledRate, "constant"); get_image_size(ho_ImageZoom, &m_scaledWidth, &m_scaledHeight); if (1.0*labelWidth / imgWidth < 1.0*labelHeight / imgHeight) { set_window_extents(m_hHalconID, labelHeight / 2.0 - m_scaledHeight / 2.0, 0, labelWidth, m_scaledHeight); } else { set_window_extents(m_hHalconID, 0, labelWidth / 2.0 - m_scaledWidth / 2.0, m_scaledWidth, labelHeight); } set_part(m_hHalconID, 0, 0, imgHeight - 1, imgWidth - 1); attach_background_to_window(hCurrentImage, m_hHalconID); set_system("flush_graphic", "true"); detach_background_from_window(m_hHalconID); attach_background_to_window(hCurrentImage, m_hHalconID); disp_obj(hCurrentImage, m_hHalconID); #endif } } //显示界面---鼠标滚轮缩放事件 void CHalconLabel::wheelEvent(QWheelEvent* ev) { double Zoom; //放大或缩小倍率 HTuple mouseRow, mouseCol, Button; HTuple startRowBf, startColBf, endRowBf, endColBf, Ht, Wt, startRowAft, startColAft, endRowAft, endColAft; //滚轮前滑，放大 if (ev->delta()>0) { Zoom = 2.0;//单步放大倍率 } else//否则缩小 { Zoom = 1 / 2.0; } //获取光标在原图上的位置，注意是原图坐标，不是Label下的坐标 HTuple hv_Exception, hv_ErrMsg; try { get_mposition(m_hHalconID, &mouseRow, &mouseCol, &Button); } catch (HException& HDevExpDefaultException) { return; } //获取原图显示的部分，注意也是原图坐标 get_part(m_hHalconID, &startRowBf, &startColBf, &endRowBf, &endColBf); //缩放前显示的图像宽高 Ht = endRowBf - startRowBf; Wt = endColBf - startColBf; //普通版halcon能处理的图像最大尺寸是32K*32K。如果无限缩小原图像，导致显示的图像超出限制，则会造成程序崩溃 if (Ht*Wt<20000 * 20000 || Zoom == 2.0) { //计算缩放后的图像区域 startRowAft = mouseRow - ((mouseRow - startRowBf) / Zoom); startColAft = mouseCol - ((mouseCol - startColBf) / Zoom); endRowAft = startRowAft + (Ht / Zoom); endColAft = startColAft + (Wt / Zoom); //如果放大过大，则返回 if (endRowAft - startRowAft < 2) { return; } if (m_hHalconID != NULL) { //如果有图像，则先清空图像 detach_background_from_window(m_hHalconID); } set_part(m_hHalconID, startRowAft, startColAft, endRowAft, endColAft); attach_background_to_window(hCurrentImage, m_hHalconID); } } //显示界面---鼠标按下事件 void CHalconLabel::mousePressEvent(QMouseEvent* ev) { HTuple mouseRow, mouseCol, Button; try { get_mposition(m_hHalconID, &mouseRow, &mouseCol, &Button); } catch (HException) { return; } //鼠标按下时的行列坐标 m_tMouseDownRow = mouseRow; m_tMouseDownCol = mouseCol; m_bIsMove = true; } //显示界面---鼠标释放事件 void CHalconLabel::mouseReleaseEvent(QMouseEvent* ev) { m_bIsMove = false; } //显示界面---鼠标移动事件(有三种情况) void CHalconLabel::mouseMoveEvent(QMouseEvent* ev) { //情况一:鼠标绘制ROI区域时，不响应鼠标移动事件 if (m_bIsDrawROI) { this->setCursor(Qt::ArrowCursor); //指针设置为普通类型 return; } //情况二：鼠标按下并移动时，只移动图像 HTuple startRowBf, startColBf, endRowBf, endColBf, mouseRow, mouseCol, Button; try { set_check("~give_error"); //不要报错 Herror ret0 = get_mposition(m_hHalconID, &mouseRow, &mouseCol, &Button); if (ret0 != H_MSG_TRUE) { return; } if (mouseCol.Num() <= 0 || mouseRow.Num() < 0) { return; } set_check("give_error"); } catch (HException) { return; } if (m_bIsMove) { this->setCursor(Qt::PointingHandCursor); //设置鼠标样式为手型指针 //计算移动值 double RowMove = mouseRow[0].D() - m_tMouseDownRow[0].D(); double ColMove = mouseCol[0].D() - m_tMouseDownCol[0].D(); //得到当前的窗口坐标 get_part(m_hHalconID, &startRowBf, &startColBf, &endRowBf, &endColBf); //移动图像 if (m_hHalconID != NULL) { //如果有图像，则先清空图像 detach_background_from_window(m_hHalconID); } set_part(m_hHalconID, startRowBf - RowMove, startColBf - ColMove, endRowBf - RowMove, endColBf - ColMove); set_check("~give_error"); Herror ret1 = attach_background_to_window(hCurrentImage, m_hHalconID); //当光标不在Halcon窗口内时返回，否则会报错 if (ret1 != H_MSG_TRUE) return; set_check("give_error"); } //情况三：鼠标未按下移动时，实时获取当前图像坐标 else { this->setCursor(Qt::ArrowCursor); //指针设置为普通类型 HTuple pointGray; try { set_check("~give_error"); //不要报错 Herror ret2 = get_grayval(hCurrentImage, mouseRow, mouseCol, &pointGray); //当光标不在Halcon窗口内时返回，否则会报错 if (ret2 != H_MSG_TRUE) { return; } if (mouseCol.Num() <= 0 || pointGray[0].D() < 0) { return; } set_check("give_error"); //不要报错 } catch (HException) { // 设置文本的颜色为红色 // this->setText(QString("X坐标：- Y坐标：- 灰度值：-")); return; } //在绘图显示界面上显示坐标 // this->setText(QString("X坐标：%1 Y坐标：%2 灰度值：%3").arg(mouseCol[0].D()).arg(mouseRow[0].D()).arg(pointGray[0].D())); } } //异步设置ID与显示，最好不要在qt的构造函数执行 void CHalconLabel::SetID() { if (m_hHalconID == NULL) { set_window_attr("background_color", "black"); //设置背景色 m_hLabelID = (Hlong)this->winId(); open_window(0, 0, this->width(), this->height(), m_hLabelID, "visible", "", &m_hHalconID); } } void CHalconLabel::SetPixelTracke(bool ret) { //设置鼠标追踪，可以实时响应鼠标移动事件 this->setMouseTracking(ret); } //设置显示图像 void CHalconLabel::DisplayImage(Hobject hDisplayImage) { //隔离数据 copy_image(hDisplayImage, &hCurrentImage); #if 0 //显示一,充满整个画幅 clear_window(m_hHalconID); detach_background_from_window(m_hHalconID); HTuple imgWidth, imgHeight; get_image_size(ho_Image, &imgWidth, &imgHeight); set_part(m_hHalconID, 0, 0, imgHeight - 1, imgWidth - 1); attach_background_to_window(ho_Image, m_hHalconID); #endif #if 1 //显示二，维持原有图像比例且居中显示 clear_window(m_hHalconID); detach_background_from_window(m_hHalconID); int labelWidth = this->width(); //窗口尺寸 int labelHeight = this->height(); HTuple im