c++ opencv mat写入二进制文件bin，bin二进制文件读取为mat

1.写入：opencv mat（float型）存为bin

	std::ofstream fout1("E:/data/flowu_2486x1856.bin", std::ios::binary | std::ios::trunc);
    Mat flowU = Mat::zeros(2486, 1856, CV_32FC1);
    for (int i = 0; i < flowU.h; i++)
	{
		for (int j = 0; j < flowU.w; j++)
		{
			fout1.write(reinterpret_cast(&flowU.at(i, j)), sizeof(float));
		}
	}
	fout1.close();

2.读取bin到opencv mat（float型）中

    FILE* fp = fopen("E:/data/flowu_2486x1856.bin", "rb");
    Mat flowU = Mat::zeros(2486, 1856, CV_32FC1);
    for (int i = 0; i < 1856; i++)
    {
        for (int j = 0; j < 2486; j++)
        {
            fread(&flowU.at(i, j), 1, sizeof(float), fp);
        }
    }
    fclose(fp);
    fp = NULL;