海康工业相机二次开发获取温度

如果想要通过海康工业相机二次开发获取温度，需要使用支持温度测量功能的海康相机，并使用对应的SDK进行开发。以下是一个简单的获取海康相机温度的C++示例代码：

#include <iostream>
#include "HCNetSDK.h"

using namespace std;

void CALLBACK fRealDataCallBack(LONG lRealHandle, DWORD dwDataType, BYTE* pBuffer, DWORD dwBufSize, void* pUser)
{
    // 处理图像数据
}

int main()
{
    NET_DVR_Init();

    // 登录相机
    LONG lUserID = NET_DVR_Login_V30("192.168.1.100", 8000, "admin", "password", NULL);
    if (lUserID < 0)
    {
        cout << "Login failed, error code: " << NET_DVR_GetLastError() << endl;
        NET_DVR_Cleanup();
        return 0;
    }

    // 启用温度测量功能
    NET_DVR_THERMOMETRY_COND struCond = {0};
    struCond.dwSize = sizeof(NET_DVR_THERMOMETRY_COND);
    struCond.byMode = THERMOMETRY_MODE_PLANAR;
    struCond.struPoint.byThermometryUnit = 1;
    struCond.struPoint.byEnableAlarmTemp = 1;
    struCond.struPoint.fAlarmTemp = 30.0;
    struCond.struPoint.struPoint.fX = 0.5;
    struCond.struPoint.struPoint.fY = 0.5;
    LONG lHandle = NET_DVR_StartRemoteConfig(lUserID, NET_DVR_SET_THERMOMETRY_COND, &struCond, sizeof(NET_DVR_THERMOMETRY_COND), NULL, NULL);
    if (lHandle < 0)
    {
        cout << "StartRemoteConfig failed, error code: " << NET_DVR_GetLastError() << endl;
        NET_DVR_Logout(lUserID);
        NET_DVR_Cleanup();
        return 0;
    }

    DWORD dwRetLen = 0;
    NET_DVR_THERMOMETRY_COND struCondRet = {0};
    if (!NET_DVR_GetNextRemoteConfig(lHandle, &struCondRet, sizeof(NET_DVR_THERMOMETRY_COND), &dwRetLen))
    {
        cout << "GetNextRemoteConfig failed, error code: " << NET_DVR_GetLastError() << endl;
        NET_DVR_StopRemoteConfig(lHandle);
        NET_DVR_Logout(lUserID);
        NET_DVR_Cleanup();
        return 0;
    }

    // 开始实时预览
    NET_DVR_PREVIEWINFO struPreviewInfo = {0};
    struPreviewInfo.hPlayWnd = NULL;
    struPreviewInfo.lChannel = 1;
    struPreviewInfo.dwStreamType = 0;
    struPreviewInfo.dwLinkMode = 0;
    LONG lRealHandle = NET_DVR_RealPlay_V40(lUserID, &struPreviewInfo, fRealDataCallBack, NULL);
    if (lRealHandle < 0)
    {
        cout << "RealPlay failed, error code: " << NET_DVR_GetLastError() << endl;
        NET_DVR_StopRemoteConfig(lHandle);
        NET_DVR_Logout(lUserID);
        NET_DVR_Cleanup();
        return 0;
    }

    // 获取温度
    NET_DVR_THERMOMETRY_ALARM struAlarm = {0};
    if (NET_DVR_GetTempAlarm(lRealHandle, &struAlarm))
    {
        float fTemp = struAlarm.struPoint.fTempValue;
        cout << "Temperature: " << fTemp << endl;
    }
    else
    {
        cout << "GetTempAlarm failed, error code: " << NET_DVR_GetLastError() << endl;
    }

    // 停止实时预览
    NET_DVR_StopRealPlay(lRealHandle);

    // 停用温度测量功能
    NET_DVR_StopRemoteConfig(lHandle);

    // 注销相机
    NET_DVR_Logout(lUserID);

    NET_DVR_Cleanup();

    return 0;
}

需要注意的是，以上代码仅供参考，实际开发中需要根据具体情况进行修改和优化。同时，使用海康相机进行温度测量需要满足一定的硬件和环境条件，否则可能会影响测量结果的准确性和稳定性。