\mode<presentation>

\setbeamertemplate{background}{
    \begin{tikzpicture}

    \end{tikzpicture}
}

\defbeamertemplate*{title page}{mum}[1][]
{
    \begin{beamercolorbox}[wd=\paperwidth,ht=1.2cm]{frametitle}
        \begin{tikzpicture}
            \node[anchor=west, mumbluefont, font=\large\bfseries](t) at (0.0, 0.61){\insertdate};
             \node[draw=none, fill=none, anchor=south east] (logo) at (\the\paperwidth,0.0){\includegraphics{mum-logo}};
             \draw[mumbluefont](t.east)--(logo);
        \end{tikzpicture}
    \end{beamercolorbox}
    \begin{beamercolorbox}[wd=\paperwidth, sep=8pt, #1,center]{title page header}
        \usebeamerfont{title}\inserttitle\par%
        \usebeamerfont{subtitle}\insertsubtitle\par%
    \end{beamercolorbox}
    \vskip0.2cm%
    \begin{beamercolorbox}[wd=\paperwidth,center,#1]{title page author}
        \usebeamerfont{author}\insertauthor%
    \end{beamercolorbox}
    \vskip0.2cm%
    \begin{beamercolorbox}[wd=\paperwidth,#1]{date}
        \usebeamerfont{author}\insertdate%
    \end{beamercolorbox}
    \begin{beamercolorbox}[wd=\paperwidth,center]{title page image}
        \includegraphics[width=0.65\paperwidth]{title-image-dull}
    \end{beamercolorbox}
    \vskip0.2cm%
    \begin{beamercolorbox}[wd=\paperwidth,center]{title page institute}
        \textcolor{mumbluefont}{
        \normalsize
        Institute of Mechanics and Ocean Engineering\\
        Hamburg University of Technology%
    }
    \end{beamercolorbox}
}

\mode<all>