\documentclass[a4paper]{article}
\usepackage{geometry}
\geometry{left=2.5cm,right=2.5cm,top=2.5cm,bottom=2.5cm}
\usepackage{endfloat}
\usepackage{graphicx}

\begin{document}

There are four results, and the first three are unsupervised decomposition, and the last is image-guided decomposition, as following.

Figure.1 Black background.

Figure.2 White background.

Figure.3 White background with Summer color.

Figure.4 Result of the IE logo image.

\begin{figure*}[htbp]
\centering
\includegraphics[width=15cm]{black.eps}
\caption{ Black background.}
\end{figure*}

\begin{figure*}[htbp]
\centering
\includegraphics[width=15cm]{white108.eps}
\caption{ White background.}
\end{figure*}

\begin{figure*}[htbp]
\centering
\includegraphics[width=15cm]{white108summer.eps}
\caption{ White background with Summer color.}
\end{figure*}

\begin{figure*}[htbp]
\centering
\includegraphics[width=15cm]{IEresult.eps}
\caption{ Result of the IE logo image.}
\end{figure*}

\end{document}