Adding image in table

\begin{table}[ht]

\caption{A table arranging images}
\centering
\begin{tabular}{cc}
\includegraphics[scale=1]{graphic1}&\includegraphics[scale=1]{graphic2}\\
\newline
\includegraphics[scale=1]{graphic3}&\includegraphics[scale=1]{graphic4}\\
\end{tabular}
\label{tab:gt}

\end{table}
Reference