If you need only the images in the center of the page, just loop:
\documentclass{article}
\usepackage[a4paper,margin=0pt]{geometry}
\usepackage[demo]{graphicx}
\pagestyle{empty}
\newcounter{image}
\newcommand{\placeimages}[2]{%
\setcounter{image}{#1}\addtocounter{image}{-1}%
\loop\ifnum\value{image}<#2\relax
\stepcounter{image}%
\vspace*{\fill}
\edef\current{\threedigits{image}}%
\includegraphics{\current}%
\\[12pt]\texttt{\current.png} % comment if you don't want the file name here
\vfill
\newpage
\repeat
}
\newcommand{\threedigits}[1]{%
\ifnum\value{#1}<100 0\fi\ifnum\value{#1}<10 0\fi\arabic{#1}%
}
\begin{document}
\centering
\placeimages{1}{123}
\end{document}
I used the demo
option for graphicx
just to avoid the need to populate my folder with mock images.