（二）Qt多线程实现海康工业相机图像实时采集
系列文章目录
提示：这里是该系列文章的所有文章的目录
第一章： （一）Qt+OpenCV调用海康工业相机SDK示例开发
第二章： （二）Qt多线程实现海康工业相机图像实时采集
文章目录
- 系列文章目录
- 前言
- 一、项目结构
- 二、初始化相机
- 三、图像保存
- 四、示例完整代码
- 五、下载链接
- 总结
前言
本文主要讲述了使用Qt多线程实现海康工业相机图像的采集，并在界面上将两个相机采集到的图像信息同时显示出来，在本系列文章中的第一篇的基础上，优化了保存图片的功能，这里将示例展示出来，以便大家学习，如有错误之处，欢迎大家批评指正。
项目效果
提示：以下是本篇文章正文内容，下面案例可供参考
一、项目结构
下面是我的示例的源代码文件目录，为了让项目结构看起来更整洁，在这里使用了pri子模块的方式，
MyCamera2.pro中增加了下列内容
#包含子模块
include (./HikSdk/HikSdk.pri) #海康SDK
（这是一个小记录：如果将Qt的MinGW项目转为MSVC项目，需要进行字符的设置）
#设置字符
QMAKE_CXXFLAGS += -execution-charset:utf-8
QMAKE_CXXFLAGS += -source-charset:utf-8
QMAKE_CXXFLAGS_WARN_ON += -wd4819
二、初始化相机
我的示例是在构造函数中进行了相机的初始化，完成了相机的打开工作，这样可以避免在开始采集时出现卡顿（相机打开比较耗时，少量相机打开可能体会不到，如果相机数增多，会有很明显的等待时长），另外本示例中使用的两个相机型号是一样的，所以不能通过这个来区分，而是在初始化时进行了相机号的设置，获取相机型号的代码可见第一篇文章中的代码。
//初始化相机
memset(&m_stDevList,0,sizeof(MV_CC_DEVICE_INFO_LIST));
//枚举子网内所有设备
int nRet = CMvCamera::EnumDevices(MV_GIGE_DEVICE | MV_USB_DEVICE,&m_stDevList);
if(MV_OK != nRet)
{
return;
}
m_deviceNum = m_stDevList.nDeviceNum;
if(m_deviceNum != 2)
{
QMessageBox::warning(this,"警告","请检查相机是否正常连接！");
return;
}
for(int i=0;i<m_deviceNum;i++)
{
MV_CC_DEVICE_INFO *pDeviceInfo = m_stDevList.pDeviceInfo[i];
int nRet = m_pcMyCamera[i]->Open(pDeviceInfo); //打开相机
if(MV_OK != nRet)
{
delete m_pcMyCamera[i];
m_pcMyCamera[i] = NULL;
QMessageBox::warning(this,"警告","打开设备失败！");
return;
}
m_pcMyCamera[i]->SetEnumValue("TriggerMode",1); //设置为触发模式
m_pcMyCamera[i]->SetEnumValue("TriggerSource",7); //设置触发源为软触发
m_pcMyCamera[i]->SetFloatValue("ExposureTime",5000); //设置曝光时间
m_cameraThread[i]->setCameraPtr(m_pcMyCamera[i]);
m_cameraThread[i]->setImagePtr(m_myImage[i]);
m_cameraThread[i]->setCameraIndex(i);
}
三、图像保存
在第一篇文章中，图像保存使用了qt中的QPixmap方法，但是如果需要实时进行图像的保存，使用这种方法会出现界面卡顿的情况，所以在本文中对保存图像的方式进行了改进，使用的是海康sdk中的保存函数，并且在线程中进行实现，完整代码见后文：
//这里进行了保存图像名的组装，并readBuffer中将保存标志置为true
//format: .bmp .tif .png .jpg
QString saveNameOne = m_cameraOnePath + "Grab_" + curTime + "." + format;
m_pcMyCamera[0]->CommandExecute("TriggerSoftware");
int readFlag = m_pcMyCamera[0]->ReadBuffer(image,true,saveNameOne.toUtf8());
//读取相机中的图像
//将saveFlag置为true，并提供保存图像名，即可实现图像的保存
int CMvCamera::ReadBuffer(cv::Mat &image,bool saveFlag,QByteArray imageName)
{
unsigned int nRecvBufSize = 0;
MVCC_INTVALUE stParam;
memset(&stParam, 0, sizeof(MVCC_INTVALUE));
int tempValue = MV_CC_GetIntValue(m_hDevHandle, "PayloadSize", &stParam);
if (tempValue != 0)
{
return -1;
}
nRecvBufSize = stParam.nCurValue;
unsigned char* pDate;
pDate=(unsigned char *)malloc(nRecvBufSize);
MV_FRAME_OUT_INFO_EX stImageInfo;
memset(&stImageInfo,0,sizeof(MV_FRAME_OUT_INFO));
tempValue= MV_CC_GetOneFrameTimeout(m_hDevHandle, pDate, nRecvBufSize, &stImageInfo, 700);
if(tempValue!=0)
{
return -1;
}
m_nBufSizeForSaveImage = stImageInfo.nWidth * stImageInfo.nHeight * 3 + 2048;
unsigned char* m_pBufForSaveImage;
m_pBufForSaveImage = (unsigned char*)malloc(m_nBufSizeForSaveImage);
bool isMono;
switch (stImageInfo.enPixelType)
{
case PixelType_Gvsp_Mono8:
case PixelType_Gvsp_Mono10:
case PixelType_Gvsp_Mono10_Packed:
case PixelType_Gvsp_Mono12:
case PixelType_Gvsp_Mono12_Packed:
isMono=true;
break;
default:
isMono=false;
break;
}
cv::Mat getImage;
if(isMono)
{
getImage = cv::Mat(stImageInfo.nHeight,stImageInfo.nWidth,CV_8UC1,pDate);
if(saveFlag)
{
MV_SAVE_IMG_TO_FILE_PARAM stSaveFileParam;
memset(&stSaveFileParam, 0, sizeof(MV_SAVE_IMG_TO_FILE_PARAM));
stSaveFileParam.enImageType = MV_Image_Bmp; // ch:需要保存的图像类型 | en:Image format to save
stSaveFileParam.enPixelType = stImageInfo.enPixelType; // ch:相机对应的像素格式 | en:Camera pixel type
stSaveFileParam.nWidth = stImageInfo.nWidth; // ch:相机对应的宽 | en:Width
stSaveFileParam.nHeight = stImageInfo.nHeight; // ch:相机对应的高 | en:Height
stSaveFileParam.nDataLen = stImageInfo.nFrameLen;
stSaveFileParam.pData = pDate;
stSaveFileParam.iMethodValue = 0;
sprintf_s(stSaveFileParam.pImagePath,256,imageName.data());
//qDebug()<<"pImagePath:"<
int nRet = SaveImageToFile(&stSaveFileParam);
if(MV_OK != nRet)
{
//qDebug()<<"nRet:"<
}
}
}
getImage.copyTo(image);
getImage.release();
free(pDate);
free(m_pBufForSaveImage);
return 0;
}
四、示例完整代码
1.MyCamera2.pro
QT += core gui
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
CONFIG += c++11
DEFINES += QT_DEPRECATED_WARNINGS
#设置字符
QMAKE_CXXFLAGS += -execution-charset:utf-8
QMAKE_CXXFLAGS += -source-charset:utf-8
QMAKE_CXXFLAGS_WARN_ON += -wd4819
#包含子模块
include (./HikSdk/HikSdk.pri) #海康SDK
SOURCES += \
main.cpp \
mainwindow.cpp \
HEADERS += \
mainwindow.h \
FORMS += \
mainwindow.ui
# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target
2.HikSdk.pri
HEADERS += \
$$PWD/camerathread.h \
$$PWD/cmvcamera.h
SOURCES += \
$$PWD/camerathread.cpp \
$$PWD/cmvcamera.cpp
msvc:
{
#OpenCV
LIBS += -L$$PWD/OpenCV/OpenCV_Msvc/lib/ -lopencv_world451d
INCLUDEPATH += $$PWD/OpenCV/OpenCV_Msvc/Includes
DEPENDPATH += $$PWD/OpenCV/OpenCV_Msvc/Includes
#SDK
LIBS += -L$$PWD/SDK/Lib/ -lMvCameraControl
INCLUDEPATH += $$PWD/SDK/Includes
DEPENDPATH += $$PWD/SDK/Includes
}
#mingw:
#{
# #OpenCV
# LIBS += -L $$PWD/OpenCV/OpenCV_MinGw/Lib/libopencv_*.a
# INCLUDEPATH += $$PWD/OpenCV/OpenCV_MinGw/Includes
#
# #SDK
# LIBS += -L$$PWD/SDK/Lib/MvCameraControl.lib
# INCLUDEPATH += $$PWD/SDK/Includes
# DEPENDPATH += $$PWD/SDK/Includes
#}
3.cmvcamera.h(直接从海康提供的SDK中复制，此处进行了修改)
/************************************************************************/
/* 以C++接口为基础，对常用函数进行二次封装，方便用户使用 */
/************************************************************************/
#ifndef _MV_CAMERA_H_
#define _MV_CAMERA_H_
#include 4.cmvcamera.cpp
#include "cmvcamera.h"
CMvCamera::CMvCamera()
{
m_hDevHandle = MV_NULL;
}
CMvCamera::~CMvCamera()
{
if (m_hDevHandle)
{
MV_CC_DestroyHandle(m_hDevHandle);
m_hDevHandle = MV_NULL;
}
}
// ch:获取SDK版本号 | en:Get SDK Version
int CMvCamera::GetSDKVersion()
{
return MV_CC_GetSDKVersion();
}
// ch:枚举设备 | en:Enumerate Device
int CMvCamera::EnumDevices(unsigned int nTLayerType, MV_CC_DEVICE_INFO_LIST* pstDevList)
{
return MV_CC_EnumDevices(nTLayerType, pstDevList);
}
// ch:判断设备是否可达 | en:Is the device accessible
bool CMvCamera::IsDeviceAccessible(MV_CC_DEVICE_INFO* pstDevInfo, unsigned int nAccessMode)
{
return MV_CC_IsDeviceAccessible(pstDevInfo, nAccessMode);
}
// ch:打开设备 | en:Open Device
int CMvCamera::Open(MV_CC_DEVICE_INFO* pstDeviceInfo)
{
if (MV_NULL == pstDeviceInfo)
{
return MV_E_PARAMETER;
}
if (m_hDevHandle)
{
return MV_E_CALLORDER;
}
int nRet = MV_CC_CreateHandle(&m_hDevHandle, pstDeviceInfo);
if (MV_OK != nRet)
{
return nRet;
}
nRet = MV_CC_OpenDevice(m_hDevHandle);
if (MV_OK != nRet)
{
MV_CC_DestroyHandle(m_hDevHandle);
m_hDevHandle = MV_NULL;
}
return nRet;
}
// ch:关闭设备 | en:Close Device
int CMvCamera::Close()
{
if (MV_NULL == m_hDevHandle)
{
return MV_E_HANDLE;
}
MV_CC_CloseDevice(m_hDevHandle);
int nRet = MV_CC_DestroyHandle(m_hDevHandle);
m_hDevHandle = MV_NULL;
return nRet;
}
// ch:判断相机是否处于连接状态 | en:Is The Device Connected
bool CMvCamera::IsDeviceConnected()
{
return MV_CC_IsDeviceConnected(m_hDevHandle);
}
// ch:注册图像数据回调 | en:Register Image Data CallBack
int CMvCamera::RegisterImageCallBack(void(__stdcall* cbOutput)(unsigned char * pData, MV_FRAME_OUT_INFO_EX* pFrameInfo, void* pUser), void* pUser)
{
return MV_CC_RegisterImageCallBackEx(m_hDevHandle, cbOutput, pUser);
}
// ch:开启抓图 | en:Start Grabbing
int CMvCamera::StartGrabbing()
{
return MV_CC_StartGrabbing(m_hDevHandle);
}
// ch:停止抓图 | en:Stop Grabbing
int CMvCamera::StopGrabbing()
{
return MV_CC_StopGrabbing(m_hDevHandle);
}
// ch:主动获取一帧图像数据 | en:Get one frame initiatively
int CMvCamera::GetImageBuffer(MV_FRAME_OUT* pFrame, int nMsec)
{
return MV_CC_GetImageBuffer(m_hDevHandle, pFrame, nMsec);
}
// ch:释放图像缓存 | en:Free image buffer
int CMvCamera::FreeImageBuffer(MV_FRAME_OUT* pFrame)
{
return MV_CC_FreeImageBuffer(m_hDevHandle, pFrame);
}
// ch:设置显示窗口句柄 | en:Set Display Window Handle
int CMvCamera::DisplayOneFrame(MV_DISPLAY_FRAME_INFO* pDisplayInfo)
{
return MV_CC_DisplayOneFrame(m_hDevHandle, pDisplayInfo);
}
// ch:设置SDK内部图像缓存节点个数 | en:Set the number of the internal image cache nodes in SDK
int CMvCamera::SetImageNodeNum(unsigned int nNum)
{
return MV_CC_SetImageNodeNum(m_hDevHandle, nNum);
}
// ch:获取设备信息 | en:Get device information
int CMvCamera::GetDeviceInfo(MV_CC_DEVICE_INFO* pstDevInfo)
{
return MV_CC_GetDeviceInfo(m_hDevHandle, pstDevInfo);
}
// ch:获取GEV相机的统计信息 | en:Get detect info of GEV camera
int CMvCamera::GetGevAllMatchInfo(MV_MATCH_INFO_NET_DETECT* pMatchInfoNetDetect)
{
if (MV_NULL == pMatchInfoNetDetect)
{
return MV_E_PARAMETER;
}
MV_CC_DEVICE_INFO stDevInfo = {0};
GetDeviceInfo(&stDevInfo);
if (stDevInfo.nTLayerType != MV_GIGE_DEVICE)
{
return MV_E_SUPPORT;
}
MV_ALL_MATCH_INFO struMatchInfo = {0};
struMatchInfo.nType = MV_MATCH_TYPE_NET_DETECT;
struMatchInfo.pInfo = pMatchInfoNetDetect;
struMatchInfo.nInfoSize = sizeof(MV_MATCH_INFO_NET_DETECT);
memset(struMatchInfo.pInfo, 0, sizeof(MV_MATCH_INFO_NET_DETECT));
return MV_CC_GetAllMatchInfo(m_hDevHandle, &struMatchInfo);
}
// ch:获取U3V相机的统计信息 | en:Get detect info of U3V camera
int CMvCamera::GetU3VAllMatchInfo(MV_MATCH_INFO_USB_DETECT* pMatchInfoUSBDetect)
{
if (MV_NULL == pMatchInfoUSBDetect)
{
return MV_E_PARAMETER;
}
MV_CC_DEVICE_INFO stDevInfo = {0};
GetDeviceInfo(&stDevInfo);
if (stDevInfo.nTLayerType != MV_USB_DEVICE)
{
return MV_E_SUPPORT;
}
MV_ALL_MATCH_INFO struMatchInfo = {0};
struMatchInfo.nType = MV_MATCH_TYPE_USB_DETECT;
struMatchInfo.pInfo = pMatchInfoUSBDetect;
struMatchInfo.nInfoSize = sizeof(MV_MATCH_INFO_USB_DETECT);
memset(struMatchInfo.pInfo, 0, sizeof(MV_MATCH_INFO_USB_DETECT));
return MV_CC_GetAllMatchInfo(m_hDevHandle, &struMatchInfo);
}
// ch:获取和设置Int型参数，如 Width和Height，详细内容参考SDK安装目录下的 MvCameraNode.xlsx 文件
// en:Get Int type parameters, such as Width and Height, for details please refer to MvCameraNode.xlsx file under SDK installation directory
int CMvCamera::GetIntValue(IN const char* strKey, OUT MVCC_INTVALUE_EX *pIntValue)
{
return MV_CC_GetIntValueEx(m_hDevHandle, strKey, pIntValue);
}
int CMvCamera::SetIntValue(IN const char* strKey, IN int64_t nValue)
{
return MV_CC_SetIntValueEx(m_hDevHandle, strKey, nValue);
}
// ch:获取和设置Enum型参数，如 PixelFormat，详细内容参考SDK安装目录下的 MvCameraNode.xlsx 文件
// en:Get Enum type parameters, such as PixelFormat, for details please refer to MvCameraNode.xlsx file under SDK installation directory
int CMvCamera::GetEnumValue(IN const char* strKey, OUT MVCC_ENUMVALUE *pEnumValue)
{
return MV_CC_GetEnumValue(m_hDevHandle, strKey, pEnumValue);
}
int CMvCamera::SetEnumValue(IN const char* strKey, IN unsigned int nValue)
{
return MV_CC_SetEnumValue(m_hDevHandle, strKey, nValue);
}
int CMvCamera::SetEnumValueByString(IN const char* strKey, IN const char* sValue)
{
return MV_CC_SetEnumValueByString(m_hDevHandle, strKey, sValue);
}
int CMvCamera::GetEnumEntrySymbolic(IN const char* strKey, IN MVCC_ENUMENTRY* pstEnumEntry)
{
return MV_CC_GetEnumEntrySymbolic(m_hDevHandle, strKey, pstEnumEntry);
}
// ch:获取和设置Float型参数，如 ExposureTime和Gain，详细内容参考SDK安装目录下的 MvCameraNode.xlsx 文件
// en:Get Float type parameters, such as ExposureTime and Gain, for details please refer to MvCameraNode.xlsx file under SDK installation directory
int CMvCamera::GetFloatValue(IN const char* strKey, OUT MVCC_FLOATVALUE *pFloatValue)
{
return MV_CC_GetFloatValue(m_hDevHandle, strKey, pFloatValue);
}
int CMvCamera::SetFloatValue(IN const char* strKey, IN float fValue)
{
return MV_CC_SetFloatValue(m_hDevHandle, strKey, fValue);
}
// ch:获取和设置Bool型参数，如 ReverseX，详细内容参考SDK安装目录下的 MvCameraNode.xlsx 文件
// en:Get Bool type parameters, such as ReverseX, for details please refer to MvCameraNode.xlsx file under SDK installation directory
int CMvCamera::GetBoolValue(IN const char* strKey, OUT bool *pbValue)
{
return MV_CC_GetBoolValue(m_hDevHandle, strKey, pbValue);
}
int CMvCamera::SetBoolValue(IN const char* strKey, IN bool bValue)
{
return MV_CC_SetBoolValue(m_hDevHandle, strKey, bValue);
}
// ch:获取和设置String型参数，如 DeviceUserID，详细内容参考SDK安装目录下的 MvCameraNode.xlsx 文件UserSetSave
// en:Get String type parameters, such as DeviceUserID, for details please refer to MvCameraNode.xlsx file under SDK installation directory
int CMvCamera::GetStringValue(IN const char* strKey, MVCC_STRINGVALUE *pStringValue)
{
return MV_CC_GetStringValue(m_hDevHandle, strKey, pStringValue);
}
int CMvCamera::SetStringValue(IN const char* strKey, IN const char* strValue)
{
return MV_CC_SetStringValue(m_hDevHandle, strKey, strValue);
}
// ch:执行一次Command型命令，如 UserSetSave，详细内容参考SDK安装目录下的 MvCameraNode.xlsx 文件
// en:Execute Command once, such as UserSetSave, for details please refer to MvCameraNode.xlsx file under SDK installation directory
int CMvCamera::CommandExecute(IN const char* strKey)
{
return MV_CC_SetCommandValue(m_hDevHandle, strKey);
}
// ch:探测网络最佳包大小(只对GigE相机有效) | en:Detection network optimal package size(It only works for the GigE camera)
int CMvCamera::GetOptimalPacketSize(unsigned int* pOptimalPacketSize)
{
if (MV_NULL == pOptimalPacketSize)
{
return MV_E_PARAMETER;
}
int nRet = MV_CC_GetOptimalPacketSize(m_hDevHandle);
if (nRet < MV_OK)
{
return nRet;
}
*pOptimalPacketSize = (unsigned int)nRet;
return MV_OK;
}
// ch:注册消息异常回调 | en:Register Message Exception CallBack
int CMvCamera::RegisterExceptionCallBack(void(__stdcall* cbException)(unsigned int nMsgType, void* pUser),void* pUser)
{
return MV_CC_RegisterExceptionCallBack(m_hDevHandle, cbException, pUser);
}
// ch:注册单个事件回调 | en:Register Event CallBack
int CMvCamera::RegisterEventCallBack(const char* pEventName, void(__stdcall* cbEvent)(MV_EVENT_OUT_INFO * pEventInfo, void* pUser), void* pUser)
{
return MV_CC_RegisterEventCallBackEx(m_hDevHandle, pEventName, cbEvent, pUser);
}
// ch:强制IP | en:Force IP
int CMvCamera::ForceIp(unsigned int nIP, unsigned int nSubNetMask, unsigned int nDefaultGateWay)
{
return MV_GIGE_ForceIpEx(m_hDevHandle, nIP, nSubNetMask, nDefaultGateWay);
}
// ch:配置IP方式 | en:IP configuration method
int CMvCamera::SetIpConfig(unsigned int nType)
{
return MV_GIGE_SetIpConfig(m_hDevHandle, nType);
}
// ch:设置网络传输模式 | en:Set Net Transfer Mode
int CMvCamera::SetNetTransMode(unsigned int nType)
{
return MV_GIGE_SetNetTransMode(m_hDevHandle, nType);
}
// ch:像素格式转换 | en:Pixel format conversion
int CMvCamera::ConvertPixelType(MV_CC_PIXEL_CONVERT_PARAM* pstCvtParam)
{
return MV_CC_ConvertPixelType(m_hDevHandle, pstCvtParam);
}
// ch:保存图片 | en:save image
int CMvCamera::SaveImage(MV_SAVE_IMAGE_PARAM_EX* pstParam)
{
return MV_CC_SaveImageEx2(m_hDevHandle, pstParam);
}
// ch:保存图片为文件 | en:Save the image as a file
int CMvCamera::SaveImageToFile(MV_SAVE_IMG_TO_FILE_PARAM* pstSaveFileParam)
{
return MV_CC_SaveImageToFile(m_hDevHandle, pstSaveFileParam);
}
// ch:绘制圆形辅助线 | en:Draw circle auxiliary line
int CMvCamera::DrawCircle(MVCC_CIRCLE_INFO* pCircleInfo)
{
return MV_CC_DrawCircle(m_hDevHandle, pCircleInfo);
}
// ch:绘制线形辅助线 | en:Draw lines auxiliary line
int CMvCamera::DrawLines(MVCC_LINES_INFO* pLinesInfo)
{
return MV_CC_DrawLines(m_hDevHandle, pLinesInfo);
}
//读取相机中的图像
int CMvCamera::ReadBuffer(cv::Mat &image,bool saveFlag,QByteArray imageName)
{
unsigned int nRecvBufSize = 0;
MVCC_INTVALUE stParam;
memset(&stParam, 0, sizeof(MVCC_INTVALUE));
int tempValue = MV_CC_GetIntValue(m_hDevHandle, "PayloadSize", &stParam);
if (tempValue != 0)
{
return -1;
}
nRecvBufSize = stParam.nCurValue;
unsigned char* pDate;
pDate=(unsigned char *)malloc(nRecvBufSize);
MV_FRAME_OUT_INFO_EX stImageInfo;
memset(&stImageInfo,0,sizeof(MV_FRAME_OUT_INFO));
tempValue= MV_CC_GetOneFrameTimeout(m_hDevHandle, pDate, nRecvBufSize, &stImageInfo, 700);
if(tempValue!=0)
{
return -1;
}
m_nBufSizeForSaveImage = stImageInfo.nWidth * stImageInfo.nHeight * 3 + 2048;
unsigned char* m_pBufForSaveImage;
m_pBufForSaveImage = (unsigned char*)malloc(m_nBufSizeForSaveImage);
bool isMono;
switch (stImageInfo.enPixelType)
{
case PixelType_Gvsp_Mono8:
case PixelType_Gvsp_Mono10:
case PixelType_Gvsp_Mono10_Packed:
case PixelType_Gvsp_Mono12:
case PixelType_Gvsp_Mono12_Packed:
isMono=true;
break;
default:
isMono=false;
break;
}
cv::Mat getImage;
if(isMono)
{
getImage = cv::Mat(stImageInfo.nHeight,stImageInfo.nWidth,CV_8UC1,pDate);
if(saveFlag)
{
MV_SAVE_IMG_TO_FILE_PARAM stSaveFileParam;
memset(&stSaveFileParam, 0, sizeof(MV_SAVE_IMG_TO_FILE_PARAM));
stSaveFileParam.enImageType = MV_Image_Bmp; // ch:需要保存的图像类型 | en:Image format to save
stSaveFileParam.enPixelType = stImageInfo.enPixelType; // ch:相机对应的像素格式 | en:Camera pixel type
stSaveFileParam.nWidth = stImageInfo.nWidth; // ch:相机对应的宽 | en:Width
stSaveFileParam.nHeight = stImageInfo.nHeight; // ch:相机对应的高 | en:Height
stSaveFileParam.nDataLen = stImageInfo.nFrameLen;
stSaveFileParam.pData = pDate;
stSaveFileParam.iMethodValue = 0;
sprintf_s(stSaveFileParam.pImagePath,256,imageName.data());
//qDebug()<<"pImagePath:"<
int nRet = SaveImageToFile(&stSaveFileParam);
if(MV_OK != nRet)
{
//qDebug()<<"nRet:"<
}
}
}
getImage.copyTo(image);
getImage.release();
free(pDate);
free(m_pBufForSaveImage);
return 0;
}
5.camerathread.h
#ifndef MYTHREAD_H
#define MYTHREAD_H
#include 6.camerathread.cpp
#include "camerathread.h"
CameraThread::CameraThread(QObject *parent)
: QThread{parent}
{
this->initThread();
}
CameraThread::~CameraThread()
{
delete myImage;
if(cameraPtr == NULL)
{
delete cameraPtr;
}
if(imagePtr == NULL)
{
delete imagePtr;
}
}
void CameraThread::initThread()
{
startFlag = false;
myImage = new QImage();
}
void CameraThread::setCameraPtr(CMvCamera *camera)
{
cameraPtr = camera;
}
void CameraThread::setImagePtr(cv::Mat *image)
{
imagePtr = image;
}
void CameraThread::setCameraIndex(int index)
{
m_cameraIndex = index;
}
void CameraThread::setSwitchFlag(bool switchFlag)
{
startFlag = switchFlag;
}
void CameraThread::run()
{
if(cameraPtr == NULL)
{
return;
}
if(imagePtr == NULL)
{
return;
}
while(startFlag)
{
cameraPtr->CommandExecute("TriggerSoftware");
cameraPtr->ReadBuffer(*imagePtr,false,"");
//先处理好再发送
if(imagePtr->channels()>1)
{
*myImage = QImage((const unsigned char*)(imagePtr->data),imagePtr->cols,imagePtr->rows,QImage::Format_RGB888);
}
else
{
*myImage = QImage((const unsigned char*)(imagePtr->data),imagePtr->cols,imagePtr->rows,QImage::Format_Indexed8);
}
emit signal_messImage(*myImage,m_cameraIndex);
}
}
7.mainwindow.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include 8.mainwindow.cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
, ui(new Ui::MainWindow)
{
ui->setupUi(this);
this->initWidget();
}
MainWindow::~MainWindow()
{
for(int i=0;i<2;i++)
{
delete m_myImage[i];
if(m_pcMyCamera[i])
{
m_pcMyCamera[i]->Close();
delete m_pcMyCamera[i];
m_pcMyCamera[i] = NULL;
}
}
}
void MainWindow::initWidget()
{
//初始化变量
m_deviceNum = 0;
m_bOpenDevice = false;
m_savePath = "";
m_cameraOnePath = "";
m_cameraTwoPath = "";
//生成保存图片的文件夹
QString curDate = QDate::currentDate().toString("yyyy-MM-dd");
m_savePath = QDir::currentPath() + "/SaveImages/" + curDate + "/";
QDir saveDir(m_savePath);
if(!saveDir.exists())
{
if(!saveDir.mkpath(m_savePath))
{
qDebug()<<"创建文件夹失败！";
//return;
}
}
for(int i=0;i<2;i++)
{
//相机对象
m_pcMyCamera[i] = new CMvCamera;
//图像指针对象
m_myImage[i] = new cv::Mat();
//线程对象实例化
m_cameraThread[i] = new CameraThread();
connect(m_cameraThread[i],SIGNAL(signal_messImage(QImage,int)),this,SLOT(slot_displayImage(QImage,int)),Qt::BlockingQueuedConnection);
}
//初始化相机
memset(&m_stDevList,0,sizeof(MV_CC_DEVICE_INFO_LIST));
//枚举子网内所有设备
int nRet = CMvCamera::EnumDevices(MV_GIGE_DEVICE | MV_USB_DEVICE,&m_stDevList);
if(MV_OK != nRet)
{
return;
}
m_deviceNum = m_stDevList.nDeviceNum;
if(m_deviceNum != 2)
{
QMessageBox::warning(this,"警告","请检查相机是否正常连接！");
return;
}
for(int i=0;i<m_deviceNum;i++)
{
MV_CC_DEVICE_INFO *pDeviceInfo = m_stDevList.pDeviceInfo[i];
int nRet = m_pcMyCamera[i]->Open(pDeviceInfo); //打开相机
if(MV_OK != nRet)
{
delete m_pcMyCamera[i];
m_pcMyCamera[i] = NULL;
QMessageBox::warning(this,"警告","打开设备失败！");
return;
}
m_pcMyCamera[i]->SetEnumValue("TriggerMode",1); //设置为触发模式
m_pcMyCamera[i]->SetEnumValue("TriggerSource",7); //设置触发源为软触发
m_pcMyCamera[i]->SetFloatValue("ExposureTime",5000); //设置曝光时间
m_cameraThread[i]->setCameraPtr(m_pcMyCamera[i]);
m_cameraThread[i]->setImagePtr(m_myImage[i]);
m_cameraThread[i]->setCameraIndex(i);
}
}
void MainWindow::saveImage(QString format,int index)
{
cv::Mat image;
//当前时间
QString curTime = QTime::currentTime().toString("hhmmss");
if(index == 1)
{
//format: .bmp .tif .png .jpg
QString saveNameOne = m_cameraOnePath + "Grab_" + curTime + "." + format;
m_pcMyCamera[0]->CommandExecute("TriggerSoftware");
int readFlag = m_pcMyCamera[0]->ReadBuffer(image,true,saveNameOne.toUtf8());
if(MV_OK == readFlag)
{
qDebug()<<"相机一图像保存成功！";
}
else
{
qDebug()<<"相机一图像保存失败！";
}
}
else if(index == 2)
{
QString saveNameTwo = m_cameraTwoPath + "Grab_" + curTime + "." + format;
m_pcMyCamera[1]->CommandExecute("TriggerSoftware");
int readFlag = m_pcMyCamera[1]->ReadBuffer(image,true,saveNameTwo.toUtf8());
if(MV_OK == readFlag)
{
qDebug()<<"相机二图像保存成功！";
}
else
{
qDebug()<<"相机二图像保存失败！";
}
}
}
void MainWindow::slot_displayImage(QImage myImage,int index)
{
if(myImage.isNull())
{
//qDebug()<<"Image is a null image!";
return;
}
//显示图像
QPixmap myPixmap = QPixmap::fromImage(myImage).scaled(QSize(400,400),Qt::IgnoreAspectRatio,Qt::SmoothTransformation);
if(index == 0)
{
ui->lb_imageOne->setPixmap(myPixmap);
}
if(index == 1)
{
ui->lb_imageTwo->setPixmap(myPixmap);
}
}
void MainWindow::on_pb_start_clicked()
{
if(!m_bOpenDevice)
{
m_bOpenDevice = true;
}
for(int i=0;i<2;i++)
{
if(m_pcMyCamera[i]->IsDeviceConnected())
{
m_pcMyCamera[i]->StartGrabbing(); //开启相机采集
if(!m_cameraThread[i]->isRunning())
{
m_cameraThread[i]->setSwitchFlag(true);
m_cameraThread[i]->start();
}
}
}
}
void MainWindow::on_pb_stop_clicked()
{
if(m_bOpenDevice)
{
m_bOpenDevice = false;
}
for(int i=0;i<2;i++)
{
m_pcMyCamera[i]->StopGrabbing(); //关闭相机采集
if(!m_cameraThread[i]->isRunning())
{
m_cameraThread[i]->setSwitchFlag(false);
}
}
}
void MainWindow::on_pb_saveOne_clicked()
{
if(!m_bOpenDevice)
{
QMessageBox::warning(this,"警告","请开启相机采集！");
}
m_cameraOnePath = m_savePath + "Camera1/";
QDir dstDir(m_cameraOnePath);
if(!dstDir.exists())
{
if(!dstDir.mkpath(m_cameraOnePath))
{
qDebug()<<"创建Camera1文件夹失败！";
//return;
}
}
saveImage("bmp",1);
}
void MainWindow::on_pb_saveTwo_clicked()
{
if(!m_bOpenDevice)
{
QMessageBox::warning(this,"警告","请开启相机采集！");
}
m_cameraTwoPath = m_savePath + "Camera2/";
QDir dstDir(m_cameraTwoPath);
if(!dstDir.exists())
{
if(!dstDir.mkpath(m_cameraTwoPath))
{
qDebug()<<"创建Camera2文件夹失败！";
//return;
}
}
saveImage("bmp",2);
}
9.mainwindow.ui
五、下载链接
我的示例百度网盘链接：https://pan.baidu.com/s/12z0t66qWDpoDUhSufXJwjw
提取码：xxcj
总结
本文使用了重写QThread的run函数来实现多线程，并通过设置标志位来控制图像采集的开始与停止，也是比较简单的方式。示例中实现了两个相机的图像采集，使用该方式也是没有出现卡顿等问题，但是在更多个相机的情况下（我同时连接过12个相机），会出现界面卡顿，我的解决方法是在线程run函数中的while循环内增加了一个10ms的延时（QThread::msleep(10);），也算暂时解决了该问题，但是如果有更好的方式，也希望得到大家的解答~
hello：
共同学习，共同进步，如果还有相关问题，可在评论区留言进行讨论。