\documentclass{standalone}
\input{./tikzpreamble}
\begin{document}
   \begin{tikzpicture}
        \node[anchor=south west,inner sep=0] (image) at (0,0) {\includegraphics[width=\textwidth]{../pics/setup_pw_2.png}};
        \begin{scope}[x={(image.south east)},y={(image.north west)}]
            \draw[black, fill=white] (.65, .53) node {\Large 1} circle (.3cm);

            \draw[black, fill=white] (.9, .25) node {\Large 2} circle (.3cm);
            \draw[black, fill=white] (.3, .85) node {\Large 2} circle (.3cm);

            \draw[black, fill=white] (.66, .8) node {\Large 3} circle (.3cm);
            \draw[black, fill=white] (.68, .22) node {\Large 3} circle (.3cm);

            \draw[black, fill=white] (.35, .53) node {\Large 4} circle (.3cm);
            \draw[black, fill=white] (.3, .3) node {\Large 5} circle (.3cm);
        \end{scope}
   \end{tikzpicture} 
\end{document}