vs+Qt+opencv+大恒相机开发(基础功能，适合初学者学习)

注：代码仅供参考，相互学习。
本意：帮助大家快速入手大恒相机，也留个记录后续优化。

配置环境：VS2019、OpenCV454、Qt5.14.2、大恒水星系列相机(gige)

优化：
2022/4/22
1、把.h文件中类成员的初始化写到构造函数中
2、重新整理相机类和主窗口类关系
2022/7/21（完）
1、基本上重写了一版，这次逻辑更加清晰，考虑更全面。
这次更新是为了这篇博客有始有终，优化到目前这个阶段对于初学者应该是够用了。

一、qt界面

二、ui框架

三、代码部分

（1）DH_MER.h

#pragma once#include <QtWidgets/QMainWindow>
#include "ui_DH_MER.h"
#include <opencv2/opencv.hpp>
#include <iostream>
#include "GalaxyIncludes.h"using namespace cv;
using namespace std;class DH_MER : public QMainWindow, public IDeviceOfflineEventHandler, public ICaptureEventHandler
{Q_OBJECTpublic:DH_MER(QWidget* parent = Q_NULLPTR);public:void DoOnImageCaptured(CImageDataPointer& objImageDataPointer, void* pUserParam);void DoOnDeviceOfflineEvent(void* pUserParam); //掉线事件回调函数
public:CGXDevicePointer m_objDevicePtr; //设备指针，指向打开的相机CGXFeatureControlPointer m_objRemoteFeatureControlPtr; //（远端）设备属性控制器指针CGXFeatureControlPointer m_objFeatureControlPtr; //本地和流属性控制器CGXStreamPointer m_objStreamPtr; //流指针，指向相机打开的流GX_DEVICE_OFFLINE_CALLBACK_HANDLE m_hDeviceOffline; //掉线事件GX_DEVICE_CLASS_LIST objDeviceClass;//设备类型CGXDeviceInfo m_deviceInfo;//设备信息QString m_firmName;//厂商名称QString m_modelName;//设备型号QString m_serialNumName;//序列号QString m_ipName;//ip地址QString m_maskName;//掩码QString m_macName;//MAC地址int64_t m_width;int64_t m_height;QString m_bitDepth;cv::Mat capturedImg; //相机采集的图片//相机状态判断bool isOpenCam; //相机是否打开bool isOpenStream; //相机流是否打开bool isOffline; //设备是否掉线bool isTrigger; //相机是否触发int exposeTime; //曝光时间QString m_triggerMode;QString m_triggerSource;private:Ui::DH_MERClass ui;public slots:void on_openDevice_clicked();void on_closeDevice_clicked();void on_startCapture_clicked();void on_stopCapture_clicked();void on_TriggerSoftware_clicked();void getExposeTime();
public:void showMatInLabel(Mat matImg);void updateUI();
};

（2）DH_MER.cpp

#pragma once#include "DH_MER.h"
#include<QWidget>DH_MER::DH_MER(QWidget *parent): QMainWindow(parent)
{ui.setupUi(this);isOpenCam = false;isOpenStream = false;isOffline = false;isTrigger = false;exposeTime = 30000;m_hDeviceOffline = NULL;m_firmName = "";m_modelName = "";m_serialNumName = "";m_ipName = "";m_maskName = "";m_macName = "";m_width = 0;m_height = 0;m_bitDepth = "";m_triggerMode = "";m_triggerSource = "";//曝光时间connect(ui.exposeTime,&QLineEdit::editingFinished, this, &DH_MER::getExposeTime);//初始化库try{IGXFactory::GetInstance().Init();//GxIAPICPPEx库在使用之前必须执行初始化}catch (CGalaxyException& e){cout << "错误码: " << e.GetErrorCode() << endl;cout << "错误描述信息: " << e.what() << endl;}ui.TriggerMode->setEnabled(false);ui.TriggerSource->setEnabled(false);ui.TriggerSoftware->setEnabled(false);ui.comboBox_3->setEnabled(false);
}
void DH_MER::on_openDevice_clicked()
{try{if (!isOpenCam){//初始化IGXFactory::GetInstance().Init();//枚举设备gxdeviceinfo_vector vectorDeviceInfo;IGXFactory::GetInstance().UpdateDeviceList(1000, vectorDeviceInfo);if (0 == vectorDeviceInfo.size()){cout << "无可用设备!" << endl;return;}cout << vectorDeviceInfo.size() << endl;//打开第一台设备m_objDevicePtr = IGXFactory::GetInstance().OpenDeviceBySN(vectorDeviceInfo[0].GetSN(), GX_ACCESS_EXCLUSIVE);isOpenCam = true;m_objRemoteFeatureControlPtr = m_objDevicePtr->GetRemoteFeatureControl();m_objFeatureControlPtr = m_objDevicePtr->GetFeatureControl();/*设备信息获取*/m_deviceInfo = m_objDevicePtr->GetDeviceInfo();m_firmName = m_deviceInfo.GetVendorName();m_modelName = m_deviceInfo.GetModelName();m_serialNumName = m_deviceInfo.GetSN();m_ipName = m_deviceInfo.GetIP();m_maskName = m_deviceInfo.GetSubnetMask();m_macName = m_deviceInfo.GetMAC();m_width = m_objRemoteFeatureControlPtr->GetIntFeature("Width")->GetValue();m_height = m_objRemoteFeatureControlPtr->GetIntFeature("Height")->GetValue();m_bitDepth = m_objRemoteFeatureControlPtr->GetEnumFeature("PixelSize")->GetValue();
#ifdef _DEBUG//设置心跳超时时间 6sm_objRemoteFeatureControlPtr->GetIntFeature("GevHeartbeatTimeout")->SetValue(6000);
#endif/*设备初始设置*///千兆网系列相机设置objDeviceClass = m_objDevicePtr->GetDeviceInfo().GetDeviceClass();if (objDeviceClass == GX_DEVICE_CLASS_GEV){//提高网络相机的采集性if (true == m_objFeatureControlPtr->IsImplemented("GevSCPSPacketSize"))        //判断设备是否支持流通道数据包功能{//获取当前网络环境的最优包长值int nPacketSize = m_objStreamPtr->GetOptimalPacketSize();//将最优包长值设置为当前设备的流通道包长值m_objRemoteFeatureControlPtr->GetIntFeature("GevSCPSPacketSize")->SetValue(nPacketSize);}//注册掉线事件m_hDeviceOffline = m_objDevicePtr->RegisterDeviceOfflineCallback(this, NULL);}//曝光时间if (exposeTime > 0 && exposeTime < 200000)m_objRemoteFeatureControlPtr->GetFloatFeature("ExposureTime")->SetValue(exposeTime);elseexposeTime = 30000;//采集模式m_objRemoteFeatureControlPtr->GetEnumFeature("AcquisitionMode")->SetValue("Continuous");//触发模式m_objRemoteFeatureControlPtr->GetEnumFeature("TriggerSelector")->SetValue("FrameStart");m_objRemoteFeatureControlPtr->GetEnumFeature("TriggerMode")->SetValue("Off");//自动曝光m_objRemoteFeatureControlPtr->GetEnumFeature("ExposureAuto")->SetValue("Off");ui.TriggerMode->setEnabled(true);ui.TriggerSource->setEnabled(true);ui.TriggerSoftware->setEnabled(true);ui.comboBox_3->setEnabled(true);}}catch (CGalaxyException& e){cout << "错误码: " << e.GetErrorCode() << endl;cout << "错误描述信息: " << e.what() << endl;}catch (std::exception& e){cout << "错误描述信息: " << e.what() << endl;}
}
void DH_MER::on_closeDevice_clicked()
{if (isOpenCam){if (isOpenStream){//发送停采命令m_objRemoteFeatureControlPtr->GetCommandFeature("AcquisitionStop")->Execute();m_objStreamPtr->StopGrab();ui.TriggerMode->setEnabled(true);ui.TriggerSource->setEnabled(true);ui.TriggerSoftware->setEnabled(true);ui.comboBox_3->setEnabled(true);m_objStreamPtr->UnregisterCaptureCallback();//注销采集回调m_objStreamPtr->Close(); //关闭相机流isOpenStream = false;}if (objDeviceClass == GX_DEVICE_CLASS_GEV){//注销掉线回调事件m_objDevicePtr->UnregisterDeviceOfflineCallback(m_hDeviceOffline);}m_objDevicePtr->Close(); //关闭相机，释放相机资源IGXFactory::GetInstance().Uninit(); //释放GxIAPICPPEx申请的所有资源isOpenCam = false;}
}
void DH_MER::on_startCapture_clicked()
{if (isOpenCam){uint32_t nStreamNum = m_objDevicePtr->GetStreamCount();if ((nStreamNum > 0) && (!isOpenStream)){m_objStreamPtr = m_objDevicePtr->OpenStream(0);isOpenStream = true;}m_objStreamPtr->RegisterCaptureCallback(this, NULL);m_objStreamPtr->StartGrab();m_objRemoteFeatureControlPtr->GetCommandFeature("AcquisitionStart")->Execute();}ui.TriggerMode->setEnabled(false);ui.TriggerSource->setEnabled(false);ui.TriggerSoftware->setEnabled(false);ui.comboBox_3->setEnabled(false);
}
void DH_MER::on_stopCapture_clicked()
{if (isOpenStream){//发送停采命令m_objRemoteFeatureControlPtr->GetCommandFeature("AcquisitionStop")->Execute();m_objStreamPtr->StopGrab();isOpenStream = false;}ui.TriggerMode->setEnabled(true);ui.TriggerSource->setEnabled(true);ui.TriggerSoftware->setEnabled(true);ui.comboBox_3->setEnabled(true);
}
void DH_MER::on_TriggerSoftware_clicked()
{try{do{m_triggerMode = ui.TriggerMode->currentText();m_triggerSource = ui.TriggerSource->currentText();if ((m_triggerMode =="on") && (m_triggerSource == "Software")){uint32_t nStreamNum = m_objDevicePtr->GetStreamCount();if ((nStreamNum > 0) && (!isOpenStream)){m_objStreamPtr = m_objDevicePtr->OpenStream(0);isOpenStream = true;}//发送开采命令m_objStreamPtr->StartGrab();m_objRemoteFeatureControlPtr->GetCommandFeature("AcquisitionStart")->Execute();CImageDataPointer objImageDataPtr = m_objStreamPtr->GetImage(500);//超时时间使用500ms，用户可以自行设定if (objImageDataPtr->GetStatus() == GX_FRAME_STATUS_SUCCESS){cout << "采集成功" << endl;void* pRGB24Buffer = NULL;//原始数据是 Mono8 图像if (objImageDataPointer->GetPixelFormat()==GX_PIXEL_FORMAT_MONO8){pRGB24Buffer = objImageDataPointer->ConvertToRaw8(GX_BIT_0_7);capturedImg = cv::Mat::zeros(cv::Size(m_width, m_height), CV_8UC1);memcpy(capturedImg.data, pRGB24Buffer, m_width * m_height);}if (objImageDataPointer->GetPixelFormat() == GX_PIXEL_FORMAT_MONO10){pRGB24Buffer = objImageDataPointer->ConvertToRGB24(GX_BIT_2_9, GX_RAW2RGB_NEIGHBOUR, true);capturedImg = cv::Mat::zeros(cv::Size(m_width, m_height), CV_8UC3);memcpy(capturedImg.data, pRGB24Buffer, m_width * m_height * 3);}//resize(img, img, Size(), 0.1, 0.1, CV_INTER_AREA);showMatInLabel(capturedImg);}m_objRemoteFeatureControlPtr->GetCommandFeature("AcquisitionStop")->Execute();m_objStreamPtr->StopGrab();}} while (0);}catch (CGalaxyException& e){cout << "错误码: " << e.GetErrorCode() << endl;cout << "错误描述信息: " << e.what() << endl;}
}
void DH_MER::showMatInLabel(Mat matImg)
{Mat src = matImg.clone();QImage imgForDisplay;if (matImg.channels() == 3)//RGB Img{cv::cvtColor(src, src, cv::COLOR_BGR2RGB);//颜色空间转换imgForDisplay = QImage((const uchar*)(src.data), src.cols, src.rows, src.cols * src.channels(), QImage::Format_RGB888);}else//Gray Img{imgForDisplay = QImage((const uchar*)(src.data), src.cols, src.rows, src.cols * src.channels(), QImage::Format_Indexed8);}ui.label_Img->setPixmap(QPixmap::fromImage(imgForDisplay));
}
void DH_MER::getExposeTime()
{try{exposeTime = ui.exposeTime->text().toInt();if (exposeTime >= 31){m_objRemoteFeatureControlPtr->GetFloatFeature("ExposureTime")->SetValue(exposeTime);}}catch (CGalaxyException& e){cout << "错误码: " << e.GetErrorCode() << endl;cout << "错误描述信息: " << e.what() << endl;}catch (std::exception& e){cout << "错误描述信息: " << e.what() << endl;}
}
void DH_MER::updateUI()
{ui.width->setText(QString::number(m_width));ui.height->setText(QString::number(m_height));ui.factoryName->setText(m_firmName);ui.basicModel->setText(m_modelName);
}
void DH_MER::DoOnDeviceOfflineEvent(void* pUserParam)
{isOffline = true;IGXFactory::GetInstance().Uninit(); //释放GxIAPICPPEx申请的所有资源cout << "设备掉线，请检查并重新连接。" << endl;
}
void DH_MER::DoOnImageCaptured(CImageDataPointer& objImageDataPointer, void* pUserParam)
{//判断图像是否为完整帧if (GX_FRAME_STATUS_SUCCESS == objImageDataPointer->GetStatus()){//图像获取为完整帧，可以读取图像宽、高、数据格式等uint64_t m_width = objImageDataPointer->GetWidth();uint64_t m_height = objImageDataPointer->GetHeight();//GX_PIXEL_FORMAT_ENTRY emPixelFormat =objImageDataPointer->GetPixelFormat();void* pRGB24Buffer = NULL;//原始数据是 Mono8 图像if (objImageDataPointer->GetPixelFormat()==GX_PIXEL_FORMAT_MONO8){pRGB24Buffer = objImageDataPointer->ConvertToRaw8(GX_BIT_0_7);capturedImg = cv::Mat::zeros(cv::Size(m_width, m_height), CV_8UC1);memcpy(capturedImg.data, pRGB24Buffer, m_width * m_height);}if (objImageDataPointer->GetPixelFormat() == GX_PIXEL_FORMAT_MONO10){pRGB24Buffer = objImageDataPointer->ConvertToRGB24(GX_BIT_2_9, GX_RAW2RGB_NEIGHBOUR, true);capturedImg = cv::Mat::zeros(cv::Size(m_width, m_height), CV_8UC3);memcpy(capturedImg.data, pRGB24Buffer, m_width * m_height * 3);}if (!capturedImg.empty()){double d = m_objRemoteFeatureControlPtr->GetFloatFeature("ExposureTime")->GetValue();exposeTime = int(d);emit sendCapturedMat(capturedImg,n);}showMatInLabel(capturedImg);updateUI();}
}

（3）main.cpp

#include "DH_MER.h"
#include <QtWidgets/QApplication>int main(int argc, char *argv[])
{QApplication a(argc, argv);qRegisterMetaType<cv::Mat>("cv::Mat");DH_MER w;w.show();return a.exec();
}

四、其他资源

大恒软件以及开发文档传送
完整项目链接（有兴趣可以自己重新配置一下环境）：
https://pan.baidu.com/s/10AJiTQC9rrZNe2HTPyO8kg
提取码：vh0i

注：相机开发存在错误和不完善的地方，仅供参考。无私分享，如有帮助，不妨收藏点赞。

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