Display figures at center in a two-column format document

Question

In my latex document no matter how much I change the width the images are not getting displayed at the center. Below is the output that I am getting using the following command. Most of my figures are either getting pushed towards the left end margin, or coming outside the 2 column like Fig5 or getting shrinked like Fig4. What should I do so that the image gets displayed in the center and is not shifted here and there.

Preamble

\RequirePackage{fix-cm}

\documentclass[twocolumn]{svjour3}          % twocolumn
%
\smartqed  % flush right qed marks, e.g. at end of proof
%
\usepackage{graphicx}
\usepackage{epstopdf}
 \usepackage{amsfonts}
\usepackage{amsmath}
\usepackage{bm}
\usepackage{hhline}
\usepackage{amssymb}

\begin{figure}
\centering
 \begin{adjustbox}{center}
\includegraphics[height=55mm,width=\columnwidth]{Fig5.eps}
 \end{adjustbox}
 \caption{test}
\end{figure}

Updated Images

Answer 1

Omitting the adjustbox wrappers should fix the issue you're experiencing.

If it doesn't, do check if the eps files' bounding boxes are set correctly, i.e., do check that there's no excess whitespace to the left and/or right of some of the graphs contained in the eps files.

\documentclass[twocolumn,demo]{svjour3} % omit 'demo' option in real doc.
\usepackage{graphicx} % for '\includegraphics' macro
%\usepackage{amsmath,amssymb,bm,hhline} % not needed for this example
\usepackage{lipsum} % filler text
\usepackage{microtype} % optional

\begin{document}
\addtocounter{figure}{3} % just for this example
\lipsum[2] % filler text
\begin{figure}[h]
   \includegraphics[height=65mm,width=\columnwidth]{Fig4.eps}
   \caption{A Test}
\end{figure}

\lipsum[1-4] % more filler text
\begin{figure}[h]
   \includegraphics[height=45mm,width=\columnwidth]{Fig5.eps}
   \caption{Another Test}
\end{figure}

\lipsum[2] % still more filler text
\end{document}

Answer 2

You are setting both height and width in includegraphics.

This causes the image aspect ratio to change.

Try setting either the height or the width, but not both. This worked for me (not having your source files I used one of mine)

\begin{figure}
\centering
\includegraphics[height=0.5\columnwidth]{test.png}
\includegraphics[width=\columnwidth]{test.png}
 \caption{test}
\end{figure}