Read OpenCV Mat from file

readmat.cpp

// refer to dumpMat gist regarding how to generate a file readable by this function
void readMatFromFile(std::string fileName, Mat& m) {
    std::ifstream file(fileName, std::ios::binary | std::ios::ate);
    std::streamsize size = file.tellg();
    if (size == 0) {
        std::cout << "File is empty or does not exist\n";
    }
    file.seekg(0, std::ios::beg);
    file.read((char*)m.data, MIN(size, m.total()*m.elemSize()));
    file.close();
}

Mat m(480, 640, CV_32F);
readMatFromFile("m_640x480_32FC1.bin", m);