center an image latex code example

Example 1: figure centering latex

\begin{figure}
\centering
... (Code for pictures, captions) ...
\end{figure}

Example 2: center image latex

\begin{center}
    \includegraphics{yourimage}
\end{center}

Example 3: Start Image from top of page Latex

I assume you issue a \clearpage (or something similar) just before using \begin{figure}...\end{figure}, right? If this is the case, add \mbox{} (or \null) after the figure environment before starting a new \chapter and your alignment should be fixed. Since there's nothing else on the page, LaTeX centres it, since that would be the best way to present the information.