using the \documentclass{llncs} instead of for example \documentclass{book} will not make the captions aligned together for the following example. How can I do to align them together:
\documentclass{llncs}
\usepackage{capt-of, showframe, blindtext}
\usepackage[demo]{graphicx}
\begin{document}
\blindtext
\begin{table}[t]\fbox{
\begin{minipage}[b]{.50\textwidth }%
\footnotesize
\begin{tabular}{ | c || c | c | c | c | } \hline
\textbf{ABC} & \textbf{KO} & \textbf{Ro} & \textbf{Ov} & \textbf{Params} \\ \hline
\multicolumn{5}{|c|}{\textbf{Well this is a text here}} \\ \hline
\textit{A1} & 123 & 123 & 123 & 123 \\ \hline
\textit{Z2} & 123 & 123 & 123 & 123 \\ \hline
\multicolumn{5}{|c|}{\textbf{Well this is another text here)}} \\ \hline
\textit{O1} & 123 & 123 & 123 & 123 \\ \hline
\textit{U9} & 123 & 123 & 123 & 123 \\ \hline
\end{tabular}%
\caption{results in this table}\label{validation}%
\end{minipage}}%
\fbox{\begin{minipage}[b]{.45\textwidth}%
\hspace*{0pt}\includegraphics[width=0.45\textwidth]{plot.pdf}%
\captionof{figure}{This is a figure not a table\label{x}}%
\end{minipage}}
\end{table}
\end{document}
