海康威视相机控制进阶

准备工作：
1、安装软件
下载并安装OpenCV库：登录Releases - OpenCV并下载OpenCV-4.6.0，完成后按提示安装即可。

2、相关配置
2.1、OpenCV库的相关配置
2.1.1、配置Windows系统环境变量
此电脑->属性->高级系统设置->高级->环境变量->系统变量->Path，在OpenCV的默认安装路径找到C:\opencv\build\x64\vc15\bin并将该路径添加到Path中然后单击确定。




2.1.2配置VS C++控制台项目属性

项目->属性->配置属性->VC++目录->可执行文件目录，添加OpenCV的安装路径：
C:\opencv\build\x64\vc15\bin

项目->属性->配置属性->VC++目录->包含目录，添加OpenCV的安装路径：
C:\Users\wenxi\opencv\build\include\opencv2
C:\Users\wenxi\opencv\build\include\opencv
C:\Users\wenxi\opencv\build\include

项目->属性->配置属性->VC++目录->库目录，添加OpenCV的安装路径：
C:\opencv\build\x64\vc15\lib

项目->属性->配置属性->链接器->输入->附加依赖项，添加C:\opencv\build\x64\vc15\lib中的opencv_world451d.lib文件。

2.2、配置MVS软件SDK
2.2.1、配置VS C++控制台项目属性

项目->属性->配置属性->链接器->常规->附加库目录，添加SDK的安装目录：
C:\Program Files (x86)\Softwares\MVS\Development\Libraries\win64，
C:\Program Files (x86)\Softwares\MVS\Development\Includes


项目->属性->配置属性->链接器->输入->附加依赖项，添加SDK的文件：MvCameraControl.lib


该文件在C:\Program Files (x86)\MVS\Development\Libraries\win64路径下：

参考文档：
海康威视工业相机SDK二次开发（VS+Opencv+QT+海康SDK+C++）（一）
海康工业相机SDK+OpenCV实例(1)：海康SDK和OPENCV的安装与编译
OpenCV (一)—安装与配置 VS2019和OpenCV4.5.1
解决方案-Visual Studio设置通用配置（包含路径+依赖库）

开始编程与调试
安装好MVS后，在安装路径C:\Program Files (x86)\MVS\Development\Documentations可以找到官方SDK的使用说明，打开工业相机SDK开发指南V4.0.0（C）可以查看海康威视相机二次开发教程：

此处选择GrabImage.cpp进行调试：

#include 
#include 
#include 
#include 
#include "MvCameraControl.h"
bool g_bExit = false;
// ch:等待按键输入 | en:Wait for key press
void WaitForKeyPress(void)
{
    while(!_kbhit())
    {
        Sleep(10);
    }
    _getch();
}
bool PrintDeviceInfo(MV_CC_DEVICE_INFO* pstMVDevInfo)
{
    if (NULL == pstMVDevInfo)
    {
        printf("The Pointer of pstMVDevInfo is NULL!\n");
        return false;
    }
    if (pstMVDevInfo->nTLayerType == MV_GIGE_DEVICE)
    {
        int nIp1 = ((pstMVDevInfo->SpecialInfo.stGigEInfo.nCurrentIp & 0xff000000) >> 24);
        int nIp2 = ((pstMVDevInfo->SpecialInfo.stGigEInfo.nCurrentIp & 0x00ff0000) >> 16);
        int nIp3 = ((pstMVDevInfo->SpecialInfo.stGigEInfo.nCurrentIp & 0x0000ff00) >> 8);
        int nIp4 = (pstMVDevInfo->SpecialInfo.stGigEInfo.nCurrentIp & 0x000000ff);
        // ch:打印当前相机ip和用户自定义名字 | en:print current ip and user defined name
        printf("CurrentIp: %d.%d.%d.%d\n" , nIp1, nIp2, nIp3, nIp4);
        printf("UserDefinedName: %s\n\n" , pstMVDevInfo->SpecialInfo.stGigEInfo.chUserDefinedName);
    }
    else if (pstMVDevInfo->nTLayerType == MV_USB_DEVICE)
    {
        printf("UserDefinedName: %s\n", pstMVDevInfo->SpecialInfo.stUsb3VInfo.chUserDefinedName);
        printf("Serial Number: %s\n", pstMVDevInfo->SpecialInfo.stUsb3VInfo.chSerialNumber);
        printf("Device Number: %d\n\n", pstMVDevInfo->SpecialInfo.stUsb3VInfo.nDeviceNumber);
    }
    else
    {
        printf("Not support.\n");
    }
    return true;
}
static  unsigned int __stdcall WorkThread(void* pUser)
{
    int nRet = MV_OK;
    MV_FRAME_OUT stOutFrame = {0};
    while(true)
    {
        nRet = MV_CC_GetImageBuffer(pUser, &stOutFrame, 1000);
        if (nRet == MV_OK)
        {
            printf("Get Image Buffer: Width[%d], Height[%d], FrameNum[%d]\n",
                stOutFrame.stFrameInfo.nWidth, stOutFrame.stFrameInfo.nHeight, stOutFrame.stFrameInfo.nFrameNum);
            nRet = MV_CC_FreeImageBuffer(pUser, &stOutFrame);
            if(nRet != MV_OK)
            {
                printf("Free Image Buffer fail! nRet [0x%x]\n", nRet);
            }
        }
        else
        {
            printf("Get Image fail! nRet [0x%x]\n", nRet);
        }
        if(g_bExit)
        {
            break;
        }
    }
    return 0;
}
int main()
{
    int nRet = MV_OK;
    void* handle = NULL;
    do 
    {
        // ch:枚举设备 | en:Enum device
        MV_CC_DEVICE_INFO_LIST stDeviceList;
        memset(&stDeviceList, 0, sizeof(MV_CC_DEVICE_INFO_LIST));
        nRet = MV_CC_EnumDevices(MV_GIGE_DEVICE | MV_USB_DEVICE, &stDeviceList);
        if (MV_OK != nRet)
        {
            printf("Enum Devices fail! nRet [0x%x]\n", nRet);
            break;
        }
        if (stDeviceList.nDeviceNum > 0)
        {
            for (unsigned int i = 0; i < stDeviceList.nDeviceNum; i++)
            {
                printf("[device %d]:\n", i);
                MV_CC_DEVICE_INFO* pDeviceInfo = stDeviceList.pDeviceInfo[i];
                if (NULL == pDeviceInfo)
                {
                    break;
                } 
                PrintDeviceInfo(pDeviceInfo);            
            }  
        } 
        else
        {
            printf("Find No Devices!\n");
            break;
        }
        printf("Please Input camera index(0-%d):", stDeviceList.nDeviceNum-1);
        unsigned int nIndex = 0;
        scanf_s("%d", &nIndex);
        if (nIndex >= stDeviceList.nDeviceNum)
        {
            printf("Input error!\n");
            break;
        }
        // ch:选择设备并创建句柄 | en:Select device and create handle
        nRet = MV_CC_CreateHandle(&handle, stDeviceList.pDeviceInfo[nIndex]);
        if (MV_OK != nRet)
        {
            printf("Create Handle fail! nRet [0x%x]\n", nRet);
            break;
        }
        // ch:打开设备 | en:Open device
        nRet = MV_CC_OpenDevice(handle);
        if (MV_OK != nRet)
        {
            printf("Open Device fail! nRet [0x%x]\n", nRet);
            break;
        }
        // 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)
        if (stDeviceList.pDeviceInfo[nIndex]->nTLayerType == MV_GIGE_DEVICE)
        {
            int nPacketSize = MV_CC_GetOptimalPacketSize(handle);
            if (nPacketSize > 0)
            {
                nRet = MV_CC_SetIntValue(handle,"GevSCPSPacketSize",nPacketSize);
                if(nRet != MV_OK)
                {
                    printf("Warning: Set Packet Size fail nRet [0x%x]!", nRet);
                }
            }
            else
            {
                printf("Warning: Get Packet Size fail nRet [0x%x]!", nPacketSize);
            }
        }
        // ch:设置触发模式为off | en:Set trigger mode as off
        nRet = MV_CC_SetEnumValue(handle, "TriggerMode", 0);
        if (MV_OK != nRet)
        {
            printf("Set Trigger Mode fail! nRet [0x%x]\n", nRet);
            break;
        }
        //ch:获取Enum型节点指定值的符号 | en:Get the symbol of the specified value of the Enum type node
        MVCC_ENUMVALUE stEnumValue = {0};
        MVCC_ENUMENTRY stEnumEntry = {0};
        nRet = MV_CC_GetEnumValue(handle, "PixelFormat", &stEnumValue);
        if (MV_OK != nRet)
        {
            printf("Get PixelFormat's value fail! nRet [0x%x]\n", nRet);
            break;
        }
        stEnumEntry.nValue = stEnumValue.nCurValue;
        nRet = MV_CC_GetEnumEntrySymbolic(handle, "PixelFormat", &stEnumEntry);
        if (MV_OK != nRet)
        {
            printf("Get PixelFormat's symbol fail! nRet [0x%x]\n", nRet);
            break;
        }
        else
        {
            printf("PixelFormat:%s\n", stEnumEntry.chSymbolic);
        }
        // ch:开始取流 | en:Start grab image
        nRet = MV_CC_StartGrabbing(handle);
        if (MV_OK != nRet)
        {
            printf("Start Grabbing fail! nRet [0x%x]\n", nRet);
            break;
        }
        unsigned int nThreadID = 0;
        void* hThreadHandle = (void*) _beginthreadex( NULL , 0 , WorkThread , handle, 0 , &nThreadID );
        if (NULL == hThreadHandle)
        {
            break;
        }
        printf("Press a key to stop grabbing.\n");
        WaitForKeyPress();
        g_bExit = true;
        Sleep(1000);
        // ch:停止取流 | en:Stop grab image
        nRet = MV_CC_StopGrabbing(handle);
        if (MV_OK != nRet)
        {
            printf("Stop Grabbing fail! nRet [0x%x]\n", nRet);
            break;
        }
        // ch:关闭设备 | Close device
        nRet = MV_CC_CloseDevice(handle);
        if (MV_OK != nRet)
        {
            printf("ClosDevice fail! nRet [0x%x]\n", nRet);
            break;
        }
        // ch:销毁句柄 | Destroy handle
        nRet = MV_CC_DestroyHandle(handle);
        if (MV_OK != nRet)
        {
            printf("Destroy Handle fail! nRet [0x%x]\n", nRet);
            break;
        }
    } while (0);
    if (nRet != MV_OK)
    {
        if (handle != NULL)
        {
            MV_CC_DestroyHandle(handle);
            handle = NULL;
        }
    }
    printf("Press a key to exit.\n");
    WaitForKeyPress();
    return 0;
}

报错1：

没有将准备工作中的MVS SDK配置好，
项目->属性->配置属性->链接器->常规->附加库目录，添加SDK的安装目录：
C:\Program Files (x86)\Softwares\MVS\Development\Libraries\win64，
C:\Program Files (x86)\Softwares\MVS\Development\Includes
项目->属性->配置属性->链接器->输入->附加依赖项，添加SDK的文件：MvCameraControl.lib即可。

报错2：


项目->属性->配置属性->常规->公共语言运行时支持，选择无公共语言运行时支持即可。

参考文档：
海康威视相机MVS软件SDK文档
C++通过DLL调用C#代码
编译器警告（等级 1 和等级 3）C4793
链接器工具错误 LNK2019