三通道图像转换为一维数组(以及PBYTE * 转Mat)

最新推荐文章于 2023-06-12 22:22:56 发布

猪八戒吃花生

最新推荐文章于 2023-06-12 22:22:56 发布

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本文链接：https://blog.youkuaiyun.com/u010185765/article/details/94568783

版权

//cv::Mat转char

方法1

cv::Mat img = cv::imread("E:\\Data\\2.bmp", 1);
cv::imshow("1", img);
char* imgdata = new char[1024 * 2048*3];

   for (int i = 0; i < img.rows; i++)
   {
       unsigned char *data = img.ptr<unsigned char>(i);
       for (int j = 0; j < img.cols * 3; j++)
       {
           imgdata[i * img.cols * 3 + j] = data[j];
           //std::cout << (int)data[j] << " ";
       }
   }
   cv::Mat Image(1024, 2048, CV_8UC3, imgdata);

方法2 （耗时最短，200us）

//单通道

cv::Mat Image = cv::imread("E:\\Data\\2.bmp", 1);

char * pBuffet = new char[Image.cols * Image.rows];
   if (Image.isContinuous())
   {
       memcpy(pBuffet, Image.data, Image.cols*Image.rows);
   }
   else
   {
       for (int i = 0; i < Image.rows; ++i)
       {
           memcpy(pBuffet, Image.ptr<uchar>(i), Image.cols);
       }
   }

//三通道

cv::Mat Image = cv::imread("E:\\Data\\2.bmp", 1);

char * pBuffet = new char[Image.cols * Image.rows*3];
   if (Image.isContinuous())
   {
       memcpy(pBuffet, Image.data, Image.cols*Image.rows*3);
   }
   else
   {
       for (int i = 0; i < Image.rows; ++i)
       {
           memcpy(pBuffet, Image.ptr<uchar>(i), Image.cols*3);
       }
   }

//Byte *转Mat图像

BYTE* pImageRGBInfo = new BYTE[BUFF_SIZE_IMAG + 1];

cv::Mat Image = cv::Mat(480, 640, CV_8UC3, pImageRGBInfo);

CV_8U转换成CV_16U

float_image.convertTo(integer_image, CV_16U, 1.0);