Est-il possible de créer le thème beamer correspondant à un canevas PowerPoint ?

\setbeamertemplate{navigation symbols}{}

\setbeamercolor{title}{fg=white}
\setbeamercolor{subtitle}{fg=white}
\setbeamerfont{title}{size=\Large,series=\bfseries}
\setbeamerfont{subtitle}{size=\Large,series=\mdseries}
\setbeamercolor{structure}{fg=orange}
\setbeamerfont{frametitle}{series=\bfseries,size=\large}
\setbeamerfont{section in toc}{series=\bfseries}
\setbeamerfont{subsection in toc}{size=\footnotesize}
\setbeamercolor{section page}{fg=white}
\setbeamerfont{section page}{size=\Large,series=\bfseries}
\setbeamercolor{frametitle}{fg=black}
\setbeamercolor{title in head/foot}{fg=gray}

\setbeamertemplate{section in toc}[sections numbered]
\setbeamertemplate{subsection in toc}[subsections numbered]

\setbeamertemplate{background canvas}{\includegraphics[width=\paperwidth]{slide}}

\newcommand{\IMTtitlepage}{
  \begingroup
  \setbeamertemplate{background canvas}{\includegraphics[width=\paperwidth]{title}}
    \begin{frame}[plain,c]
    \hfill
    \begin{minipage}{.5\textwidth}
      \flushright%
      {%
        \usebeamerfont{title}%
        \usebeamercolor[fg]{title}%
        \ifx\inserttitle\empty\else\inserttitle\par\fi
      }%
      {%
        \usebeamerfont{subtitle}%
        \usebeamercolor[fg]{title}%
        \ifx\insertsubtitle\empty\else\insertsubtitle\par\fi
      }
    \end{minipage}
  \end{frame}   
  \endgroup
}

\newcommand{\IMTtableofcontents}{
  \begingroup
  \setbeamertemplate{background canvas}{\includegraphics[width=\paperwidth]{toc}}
    \begin{frame}[plain,t]
    \vspace*{1cm}
    \begin{columns}[onlytextwidth,t]
      \begin{column}{.6\textwidth}
        \usebeamerfont{frametitle}%
        \color{white}%
        Sommaire
      \end{column}
      \begin{column}{.4\textwidth}
        \tableofcontents
      \end{column}
    \end{columns}
  \end{frame}   
  \endgroup
}

\AtBeginSection{%
  \begingroup
  \setbeamertemplate{background canvas}{\includegraphics[width=\paperwidth]{section}}
    \begin{frame}[plain,c]
    \hfill
    \begin{minipage}{.5\textwidth}
      \flushright%
      {%
        \usebeamerfont{section page}%
        \usebeamercolor[fg]{section page}%
        \insertsection\par
      }%
    \end{minipage}
  \end{frame}   
  \endgroup
}

\setbeamertemplate{frametitle}{%
  \ifbeamercolorempty[bg]{frametitle}{}{\nointerlineskip}%
  \hskip-0.3cm%
  \begin{beamercolorbox}[sep=0.3cm,wd=.8\textwidth]{frametitle}
    \usebeamerfont{frametitle}%
    \vbox{}\vskip-1ex%
    \strut\insertframetitle\strut\par%
    {%
      \ifx\insertframesubtitle\@empty%
      \else%
      {\usebeamerfont{framesubtitle}\usebeamercolor[fg]{framesubtitle}\strut\insertframesubtitle\strut\par}%
      \fi
    }%
    \vskip-1ex%
  \end{beamercolorbox}%
  \hfill
  \begin{beamercolorbox}[sep=0.3cm,wd=.2\textwidth]{frametitle}
    \usebeamerfont{frametitle}%
    \vbox{}
    \strut\hfill\structure{\insertframenumber}\strut\par%
  \end{beamercolorbox}%  
}

\setbeamertemplate{footline}{%
  \leavevmode%
  \hbox{%
  \begin{beamercolorbox}[wd=.2\paperwidth,ht=2.25ex,dp=1ex,center]{author in head/foot}%
  \end{beamercolorbox}%
  \begin{beamercolorbox}[wd=.6\paperwidth,ht=2.25ex,dp=1ex,center]{title in head/foot}%
    \usebeamerfont{title in head/foot}\insertshorttitle
  \end{beamercolorbox}%
  \begin{beamercolorbox}[wd=.2\paperwidth,ht=2.25ex,dp=1ex,right]{date in head/foot}%
  \end{beamercolorbox}}%
  \vskip10pt%
}