海康相机GrabImage

#include <stdio.h>
#include <Windows.h>
#include <process.h>
#include <conio.h>
#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();
}

//相机参数
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};

MV_DISPLAY_FRAME_INFO stDisplayInfo = { 0 };


MV_DISPLAY_FRAME_INFO 成员变量
//void *  hWnd  //窗口句柄
//unsigned char *  pData //显示的数据 
//unsigned int  nDataLen//数据长度 
//unsigned short  nWidth//图像宽 
//unsigned short  nHeight//图像高 
//enum MvGvspPixelType  enPixelType//像素格式
//unsigned int  nRes[4]//保留 




HWND g_hwnd = GetForegroundWindow();//获取当前DOS窗口句柄


    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);

//将图片显示在DOS窗口上
if (g_hwnd)
{
stDisplayInfo.hWnd = g_hwnd;
stDisplayInfo.pData = stOutFrame.pBufAddr;// 指向图像数据的指针
stDisplayInfo.nDataLen = stOutFrame.stFrameInfo.nFrameLen;//数据长度 
stDisplayInfo.nWidth = stOutFrame.stFrameInfo.nWidth;   // 图像的宽度（像素）
stDisplayInfo.nHeight = stOutFrame.stFrameInfo.nHeight; // 图像的高度（像素）
stDisplayInfo.enPixelType = stOutFrame.stFrameInfo.enPixelType;  // 像素类型，如黑白、RGB、Bayer等

MV_CC_DisplayOneFrame(pUser, &stDisplayInfo);
}





            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: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;
        }
//在C/C++编程中，_beginthreadex 是一个用于在Microsoft Visual Studio环境下创建线程的函数。
//这个函数定义在<process.h>头文件中，它允许你在一个独立的线程中启动一个新的执行路径。下面是对给定代码行的解释：
//NULL：这是线程属性指针，通常设置为NULL表示使用默认属性。
//0：这是线程堆栈大小。如果设置为0，那么系统会根据默认值或编译器设置来决定堆栈大小。
//WorkThread：这是指向线程函数的指针，当线程开始运行时，将从这里开始执行。
//handle：这是传递给WorkThread函数的参数。当WorkThread被调用时，它的第一个参数将接收这个值。
//0：这是线程的优先级增量。通常设置为0，意味着线程将具有默认的优先级。
//&nThreadID：这是一个指向整型变量的指针，_beginthreadex函数将返回创建的新线程的ID到这个变量中。



        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;
}

本代码将会把工业相机拍摄图像显示在DOS窗体上

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原文地址：https://blog.csdn.net/weixin_45794330/article/details/140405201

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