Determine the type of cv::Mat

cv_mat_type.cpp

// previously defined
cv::Mat cv_matrix;

std::string r;
int type = cv_matrix.type();

uchar depth = type & CV_MAT_DEPTH_MASK;
uchar chans = 1 + (type >> CV_CN_SHIFT);

switch ( depth ) {
  case CV_8U:  r = "8U"; break;
  case CV_8S:  r = "8S"; break;
  case CV_16U: r = "16U"; break;
  case CV_16S: r = "16S"; break;
  case CV_32S: r = "32S"; break;
  case CV_32F: r = "32F"; break;
  case CV_64F: r = "64F"; break;
  default:     r = "User"; break;
}
r += "C";
r += (chans+'0');

// display result
std::cout << "type: " << r.c_str() << std::endl;