海康工业相机 MVS 抓图并转为Mat格式，支持彩色相机

int CMyCamera::startGrabImage(Mat &image, string &info)
{

   unsigned int nRecvBufSize = 0;
   MVCC_INTVALUE stParam;
   memset(&stParam, 0, sizeof(MVCC_INTVALUE));
   int nRet = MV_CC_GetIntValue(m_hDevHandle, "PayloadSize", &stParam);
   if (nRet != 0)
   {
       return -1;
   }
   nRecvBufSize = stParam.nCurValue;
   m_pBufForDriver = (unsigned char *)malloc(nRecvBufSize);
   MV_FRAME_OUT_INFO_EX stImageInfo = { 0 };
   nRet = MV_CC_GetOneFrameTimeout(m_hDevHandle, m_pBufForDriver, nRecvBufSize, &stImageInfo, 1000);
   if (nRet != 0)
   {
       return -1;
   }
   m_nBufSizeForSaveImage = stImageInfo.nWidth * stImageInfo.nHeight * 3 + 2048;
   m_pBufForSaveImage = (unsigned char*)malloc(m_nBufSizeForSaveImage);

   bool isMono;//判断是否为黑白图像
   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;
   }

   if (isMono)
   {
       image = Mat(stImageInfo.nHeight, stImageInfo.nWidth, CV_8UC1, m_pBufForDriver);
   }
   else
   {
       //转换图像格式为BGR8
       MV_CC_PIXEL_CONVERT_PARAM stConvertParam = { 0 };
       memset(&stConvertParam, 0, sizeof(MV_CC_PIXEL_CONVERT_PARAM));
       stConvertParam.nWidth = stImageInfo.nWidth;
       stConvertParam.nHeight = stImageInfo.nHeight;
       stConvertParam.pSrcData = m_pBufForDriver;
       stConvertParam.nSrcDataLen = stImageInfo.nFrameLen;
       stConvertParam.enSrcPixelType = stImageInfo.enPixelType;
       stConvertParam.enDstPixelType = PixelType_Gvsp_BGR8_Packed;
       //stConvertParam.enDstPixelType = PixelType_Gvsp_RGB8_Packed;
       stConvertParam.pDstBuffer = m_pBufForSaveImage;
       stConvertParam.nDstBufferSize = m_nBufSizeForSaveImage;
       MV_CC_ConvertPixelType(m_hDevHandle, &stConvertParam);
       image = Mat(stImageInfo.nHeight, stImageInfo.nWidth, CV_8UC3, m_pBufForSaveImage);
       return MV_OK;
   }
   return MY_FAIL;
}

来源：https://www.cnblogs.com/chenhuanting/p/11678685.html

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