private void handleBtn_auto()
    {
        string point = DropDown_point.GetComponent <Dropdown>().captionText.text;
        string args  = "-a " + point;

        txtA.GetComponent <Text>().text = "Command args: " + args;

        StartProcess(exe_filepath, args);
    }
    private void handleBtnB()
    {
        string camera1 = DropDown_cameraA.GetComponent <Dropdown>().captionText.text;
        string camera2 = DropDown_cameraB.GetComponent <Dropdown>().captionText.text;
        string point   = DropDown_point.GetComponent <Dropdown>().captionText.text;
        string args    = "-p " + camera1 + " " + camera2 + " " + point + " False" + " False";

        txtA.GetComponent <Text>().text = "Command args: " + args;

        StartProcess(exe_filepath, args);
    }