\begin{figure}[b!]
    \subfloat[title do a \label{fig1}]{%
        \includegraphics[width=0.45\columnwidth]{img/obrazeka.png}
    }
    \hfill
    \subfloat[titel do b\label{fig2}]{%
        \includegraphics[width=0.44\columnwidth]{./img/obrazekb.jpg}
    }
    \caption{tytul global}
    \label{fig}
\end{figure}