Useful functions to get the depth or type of a cv::Mat

depth_type_cvmat.cpp

std::string GetMatDepth(const cv::Mat& mat)
{
    const int depth = mat.depth();

    switch (depth)
    {
    case CV_8U:  return "CV_8U";
    case CV_8S:  return "CV_8S";
    case CV_16U: return "CV_16U";
    case CV_16S: return "CV_16S";
    case CV_32S: return "CV_32S";
    case CV_32F: return "CV_32F";
    case CV_64F: return "CV_64F";
    default:
        return "Invalid depth type of matrix!";
    }
}

std::string GetMatType(const cv::Mat& mat)
{
    const int mtype = mat.type();

    switch (mtype)
    {
    case CV_8UC1:  return "CV_8UC1";
    case CV_8UC2:  return "CV_8UC2";
    case CV_8UC3:  return "CV_8UC3";
    case CV_8UC4:  return "CV_8UC4";

    case CV_8SC1:  return "CV_8SC1";
    case CV_8SC2:  return "CV_8SC2";
    case CV_8SC3:  return "CV_8SC3";
    case CV_8SC4:  return "CV_8SC4";

    case CV_16UC1: return "CV_16UC1";
    case CV_16UC2: return "CV_16UC2";
    case CV_16UC3: return "CV_16UC3";
    case CV_16UC4: return "CV_16UC4";

    case CV_16SC1: return "CV_16SC1";
    case CV_16SC2: return "CV_16SC2";
    case CV_16SC3: return "CV_16SC3";
    case CV_16SC4: return "CV_16SC4";

    case CV_32SC1: return "CV_32SC1";
    case CV_32SC2: return "CV_32SC2";
    case CV_32SC3: return "CV_32SC3";
    case CV_32SC4: return "CV_32SC4";

    case CV_32FC1: return "CV_32FC1";
    case CV_32FC2: return "CV_32FC2";
    case CV_32FC3: return "CV_32FC3";
    case CV_32FC4: return "CV_32FC4";

    case CV_64FC1: return "CV_64FC1";
    case CV_64FC2: return "CV_64FC2";
    case CV_64FC3: return "CV_64FC3";
    case CV_64FC4: return "CV_64FC4";

    default:
        return "Invalid type of matrix!";
    }
}