No beamer, como cancelar temporariamente o frametitle

Question

Tenho uma imagem neste quadro e quero mostrá-la sem nenhum outro item. Assim como abaixo.

E meu MWE é

\documentclass[14pt]{beamer}% http://ctan.org/pkg/beamer
\let\Tiny\tiny% http://tex.stackexchange.com/q/58087/5764
\usetheme{Berkeley}
\makeatletter
\beamer@headheight=1.5\baselineskip
\makeatother
\setbeamercolor{normal text}{bg=black!10}
\title[Title]{My title}
\subtitle{Subtitle}
\author{Author}
\institute[Institute]{My institute}
\date[Date]{My date}
\logo{\color{blue!50}\scalebox{2}{\TeX}} % you can % it
\begin{document}

\begin{frame}
  \titlepage
\end{frame}

\section{A section}
\subsection{A subsection}
\begin{frame}
  \frametitle{Frame title}
  \framesubtitle{frame subtitle}
  Some text
\end{frame}

\begin{frame}
  Some more text
\end{frame}

\section{Another section}
\subsection{Another subsection}
\begin{frame}
  picture
\end{frame}
\end{document} 

Answer 1

Use a plainopção para o quadro:

\begin{frame}[plain]
  picture
\end{frame}

Um exemplo completo:

\documentclass[14pt]{beamer}% http://ctan.org/pkg/beamer
\let\Tiny\tiny% http://tex.stackexchange.com/q/58087/5764
\usetheme{Berkeley}
\makeatletter
\beamer@headheight=1.5\baselineskip
\makeatother
\setbeamercolor{normal text}{bg=black!10}
\title[Title]{My title}
\subtitle{Subtitle}
\author{Author}
\institute[Institute]{My institute}
\date[Date]{My date}
\logo{\color{blue!50}\scalebox{2}{\TeX}} % you can % it
\begin{document}

\begin{frame}
  \titlepage
\end{frame}

\section{A section}
\subsection{A subsection}
\begin{frame}
  \frametitle{Frame title}
  \framesubtitle{frame subtitle}
  Some text
\end{frame}

\begin{frame}
  Some more text
\end{frame}

\section{Another section}
\subsection{Another subsection}
\begin{frame}[plain]
  picture
\end{frame}
\end{document} 

Como você pode ver na imagem acima, isso aniquila os elementos decorativos, mas a largura da barra lateral ainda é preservada, então você vai precisar de um negativo \hspace:

\documentclass[14pt]{beamer}% http://ctan.org/pkg/beamer
\let\Tiny\tiny% http://tex.stackexchange.com/q/58087/5764
\usetheme{Berkeley}
\makeatletter
\beamer@headheight=1.5\baselineskip
\makeatother
\setbeamercolor{normal text}{bg=black!10}
\title[Title]{My title}
\subtitle{Subtitle}
\author{Author}
\institute[Institute]{My institute}
\date[Date]{My date}
\logo{\color{blue!50}\scalebox{2}{\TeX}} % you can % it
\begin{document}

\begin{frame}
  \titlepage
\end{frame}

\section{A section}
\subsection{A subsection}
\begin{frame}
  \frametitle{Frame title}
  \framesubtitle{frame subtitle}
  Some text
\end{frame}

\begin{frame}
  Some more text
\end{frame}

\section{Another section}
\subsection{Another subsection}
\setbeamertemplate{sidebar}{}
\begin{frame}[plain]
  \hspace*{-2.7cm}\includegraphics[height=\paperheight,width=\paperwidth]{ctanlion}
\end{frame}
\end{document} 

_{Desenho do leão CTAN por Duane Bibby.}