latex图片居中代码示例：

\begin{figure*}[!t]
\centering
\centerline{\includegraphics[width=3.3in]{Medical Image Steganography by Lossless Soft Compression and Adaptive n-LSB/images/figure5.pdf}}
\caption{Simulation result of the embedding and extracting processes for color images in different datasets.}
\label{fig: embedding and extracting}
\end{figure*}